August 2008 Purchase this issue

Four-Channel A/V Selector
Select one of four S-Video or composite video sources plus audio

Temperature Switch
A cheap general-purpose design that can work up to 245 deg C

Mains Monitor
Keep track of electricity in your home

July 2008 Purchase this issue

Universal High-Energy LED Lighting System - Part 2
An incredibly versatile Luxeon LED lighting system - easy dimming, flashing and automatic switch-on

Galactic Voice
Develop an instant rapport with Droids, Cyclons, Klingons and Daleke

COOLMASTER
Turn a fridge into a wine cooler or a freezer into a fridge

June 2008 Purchase this issue

Universal High-Energy LED Lighting System - Part 1
An incredibly versatile Luxeon LED lighting system - easy dimming, flashing and automatic switch-on

Monopoly Money
See if you can do a better job than Wall Street

Mini Theremin - Part 2
A unique and versatile electronic musical instrument

May 2008 Purchase this issue

A PC-Controlled Burglar Alarm System - Part 2
Fancy a full-featured alarm control panel with dialer capabilities?

Studio Series Preamplifier - Installing the Modules
How to assemble the modules into a quality case

Mini Theremin - Part 1
A unique and versatile electronic musical instrument

Electric Mobility Buggy Monitor
Adds speed and distance monitoring to wheeled vehicles

April 2008 Purchase this issue

A PC-Controlled Burglar Alarm System - Part 1
Fancy a full-featured alarm control panel with dialer capabilities?

Studio Series - Remote Control Module
If you’ve built our preamp described in February 2008, then this
project is a must-have addition.

PIC In-Circuit Programming Add-On
Does your PIC programmer have provision for in-circuit programming?

MIDI Activity Detector
If you build, repair or regularly set up MIDI (Musical Instrument Digital Interface) systems, you need this easy-to-use, ‘quick-check’ gadget!

Teach-In 2008 - Part 6:
24-Hour clock, frequency generation and data EEPROM

March 2008 Purchase this issue

Studio Series - Stereo Headphone Amplifier:
A top-class headphone amp that can drive high or low impedance ‘phones to full power levels, with very low noise and distortion

Flourescent Tube Driver:
Provides fluorescent lighting from a 6V rechargeable battery. Ideal for emergency, camping and no-mains lighting applications

Multi Throttle Control for PC Flight Simulators:
Build this simple controller and start flying with the big boys

MIDI Drum Kit- Part 4:
The software...and driving it!

Teach-In 2008 - Part 5:
Introduction to timers, BCD counting and equality checking

Electrosmog Sniffer:
Read Most EMFs

Studio Series - Stereo Preamplifier:
A Superb Preamplifier For The Audio Enthusiast!

Low-Cost intercooler Water Spray Controller:
A cheap but sophisticated way of controlling a turbo car intercooler water spray

MIDI Drum Kit- Part 3:
Building the sensors and stand

Teach-In 2008 - Part 4:
Using Alphanumeric LCDs under PIC Control

PIC n Mix - Feb. 08:
Static LCDs and PICs

Serial I/O Controller & Analogue Sampler:
Looking for an easy-to-drive I/O controller?

PIC Carillon:
Ding-Dong Merrily on High, or Lower!

Phone/Fax Missed Call Alert:
A device that detects incoming calls on your phone or fax

MIDI Drum Kit- Part 2:
Puting it all together

Teach-In 2008 - Part 3:
Using PIC Microcontrollers – More PIC Control Concepts Plus Multiplexing

MIDI Drum Kit- Part 1:
Drums without the skins

PIC Speech Synthesiser:
PIC-generated speech for PIC projects

Teach-In 2008 - Part 2:
Using PIC Microcontrollers – Programme basic commands, plus simple LED control

Build a charger for your iPOD or MP3 player :
Charge from a mains plug-pack or a car battery

AVR ISP SocketBoard:
Supports dual-in-line AVR micros

Vehicle Multi-Voltage Monitor:
Monitors voltages and sensor signals in a car

Experimenter's Audio System:
Audio preamp, filters, power amp and PSU for radio experiments

The Power of Mechatronics - Part 6:
A simple approach to RF networking

Teach-In 2008 - Part 1:
Using PIC Microcontrollers – Introduction

USB Electrocardiograph:
Displays ECG on a PC

Inductance & Q-Factor Meter Part 2:
A wide range multi-frequency inductance and Q-factor meter

V8 Doorbell:
Sounds like a real V8 engine

Inductance & Q-Factor Meter:
A wide range multi-frequency inductance and Q-factor meter

Standby Power Saver:
Remotely turns off appliances in standby mode

Build Your Own Siesmograph:
Display ‘tremors’on a PC

The Power of Mechatronics - Part 5:
A New Dimension

V2 PC Scope – Part 2:
A PIC and PC controlled hobbyist oscilloscope

Pocket TENS:
Pain relief without drugs

Flexitimer:
Multipurpose easy-to-programme timer

USB Breakout Box:
Check you are not overloading the USB port

The Power of Mechatronics - Part 4:
Adding Speech To Your Application

V2 PC Scope – Part 1:
A PIC and PC controlled hobbyist oscilloscope

RFID Security Module:
Contactless ‘key’ system

TwinTen Stereo Amplifier:
Easy-to-build, with surprising performance

Printer Port Hardware Simulator:
Tests printers and other peripherals without a PC

The Power of Mechatronics - Part 3:
Stepping up a Gear

Lead-Acid Battery Zapper:
Extend the working life of liquid-electrolyte lead-acid batteries

Video Reading Aid:
Displays enlarged text on a TV or video monitor

MiniCal 5V Meter Calibration Standard :
Control your power costs

A Poor Man's Q-Meter:
How accurate is your digital multimeter? Plus a frequency reference

3V to 9V DC-DC Converter:
Never buy another 9V battery

Bat Sonar:
Listen to the sounds of bats, plus an ultrasonic sonar

Energy Meter – Part 2:
Control your power costs

A Poor Man's Q-Meter:
Simple circuit to measure inductance and 'Q'

SMS Controller – Add-ons:
Three external circuits for the SMS Controller: Test jig; PIR sensor and a low battery alarm

Bass Extender:
Pump up the bass response of your speakers

Energy Meter – Part 1:
Control your power costs

Caravan Lights:
Are your trailer lights working?

SMS Controller – Pt. 2:
Control equipment from anywhere using SMS and an old Nokia mobile phone

PIC Polyphonium – Pt. 2:
A polyphonic musical design that’s PC linked, with on-screen musical score (LED display interface)

Students’ Amp:
Great sound, inexpensive, easy to build 20W module

Star Power:
Luxeon Star LED supply that runs off 12V DC, ideal for cars, caravans and boats

SMS Controller – Pt. 1:
Control equipment from anywhere using SMS and an old Nokia mobile phone

PIC Polyphonium:
A polyphonic musical design that’s PC linked, with on-screen musical score

A Lap Counter for Swimming Pools:
If you swim to keep in shape this project will count the lengths

IR Remote Checker:
Test your remote controls with this simple project

PIC Digital Geiger Counter:
With LCD readout and USB interface

Courtesy Light Delay:
Universal circuit fits all vehicles

Programmable Robot:
Bump and respond; random motion; programmable sound; light sensing

Charger for Deep-cycle 12V Batteries – Part 2:
A 16A, 3-step PIC controlled design

Balances Microphone Preamp:
Suitable for PA, Karaoke and many other applications

Jumping Spider:
Easy-to-build fun project

High-efficiency Power supply for 1w Luxeon Star LEDs:
Uses a pair of D cells and includes a brightness control

Charger for deep-cycle 12v batteries - Part 1:
A 16A, 3-step PIC controlled design

USB Power Injector:
Feeds extra power into the USB line

RGB TO Component Video Converter:
For home cinema set-ups

Lapel Microphone Adaptor for PA Systems:
Allows electret microphones to be used with PA systems

Mind Trainer:
A logic game to exercise your grey cells

Studio 350 Power Amplifier Module - Part 2:
A really quiet, low distortion power amp with some real grunt

Giant LED Message Display:
Get your message across in lights!

Quick Brake:
Reduces brake light turn-on time by 200ms

Micropower Battery Protector:
Protect your expensive batteries with this electronic cut-out

Studio 350 Power Amplifier Module - Part 1:
A really quiet, low distortion power amp with some real grunt

Fridge Door-Open Alarm:
Don’t lose that chill!

Through-Glass Alarm:
Triggered by a hand against the glass of a door or window

Linear Supply for 1W Star LEDs:
Run and dim one or more Luxeon 1W Star LEDs from 12V DC September 2006 Purchase this issue

A Low-cost 50MHz Frequency Meter:
An accurate autoranging design

A Smart Mixture Display for your Car:
Track your car’s fuel mixtures in real time

Human-powered LED Torches:
Deceptively simple with quite amazing output

Water Level Gauge:
How much water is in your garden butt

Loudspeaker Level Meter:
For home theatre and PA set-up

Telephone Dialer for Burgler Alarms:
Dials a preprogrammed number when triggered

Adjustable DC-DC Converter for Cars:
Run electronic equipment in your car

High Intensity Torch:
PIC controlled LED torch

PIC Sudoku Unit:
Hand-held game player and PC puzzle solving software

Digital Instrument Display for Cars - Part 2:
Calibration and connection of the unit

A Dirt Cheap High Current Bench Supply:
Modify that old PC PSU to give 13·5V at up to 17A

PC Power Monitor:
Monitors the main DC power rails in your PC

Poor Man's Metal Detector:
Just five components give surprisingly good results.

Digital Instrument Display for Cars - Part 1:
Convert analogue instruments to a digital display.

Widgy Box Distortion Effects for Your Guitar:
Great sounds – cheap and easy to build.

Phone Ring and Test:
UK, US and European ring tones, plus a basic test.

Digital Reaction Timer:
Test your reaction times using a digital multimeter

Nail Sniffer & Volts Hound:
Two monitors to help you do DIY safely!

LED Lighting for Your Car:
Replace your car’s filament lamps with LEDs for improved safety

Smart Card Reader and Programmer:
Reads and programmes smart cards

A Programmable Continuity Tester:
An ideal go/no go tester

Omni Pendulum:
A fun design to entertain you

The Portapal Public Address Amplifier – Part 2:
Building our state of the art design

‘Smart’ Slave Flash Trigger:
Works with multiple flash “red-eye reduction” cameras

The Portapal Public Address Amplifier – Part 1:
A state of the art 33W RMS design

Telescope Interface:
Link your Meade telescope with your handheld GPS receiver

Power Up:
Turns peripherals on automatically

Video-Audio Booster for Home Theatre:
Boosts composite, S-Video or component video plus audio signals

A Highly Flexible Keypad Alarm:
A stand-alone system for home, office, car etc

An Active 3-Way Crossover for Loudspeaker Systems:
For those that want the very best from their loudspeaker systems

Status Monitor:
Is your boiler or freezer still on – remotely monitor them

Jazzy Heart:
A flashing piece of jewellery for the love of your life

A "Tiptronic-style" Gear Indicator:
Car and motorbike digital indicator

Sunset Switch:
On at dusk off when you want

PIC Ambilux:
Colour changes to ambient temperature

Current Clamp Adaptor for Multimeters:
Looking for a current clam⠼ĺme￿￿r ��at��ont break the bank?

Vehicle Frost Box Mk2:
With winter approaching again, give yourself extra warning of treacherous road conditions

Propeller Monitor:
Know the power and revolution rate developed by your propeller or motorised model

Solid-State Hammond:
Add moving spatial ambience to your stereo recordings

Solid-State Valve Power Supply:
A low voltage converter for powering your prized valve equipment, including vintage radios and amplifiers etc. Can supply up to 200V at 100mA plus 6V at 1A

Speed Camera Watch Mk2:
An enhanced version of a sophisticated unit to improve your road safety when driving.

Multi-Function R/C Switch:
A single channel radio controlled transceiver can control four peripheral functions

Back to Basics - Part 8 - Noughts and Crosses Enigma and Weather Vane:
Continuing our series of simple, easy-to-build circuits based on one or two CMOS logic chips

PIC Chromatone:
Be entertained by a light controlled musical novelty

Halloween Howler:
Fun project; the sound comes from WAV files stored in EEPROM

PIC-based USB Interface:
USB the easy way with a PIC18F2455 microcontroller

Photic Phone:
Communicate digitally over a light beam

Back to Basics - Part 7 - Parking Radar and Telephone Switcher:
Continuing our series of simple, easy-to-build circuits based on one or two CMOS logic chips

All-Band Radio:
No-frills, low-budget, easy-build, sensitive radio with excellent reception

Multicore Cable Tester:
How to conveniently check lengthy multicore cables

Snooker and Darts Scoreboard:
Readily display all the scores at your snooker and darts matches

Controlling Model Railway Signals:
Using stepper motors to control the semaphore signals used with model railways

Back to Basics - Part 6 - Daily Reminder and Whistle Switch:
Continuing our series of simple, easy-to-build circuits based on one or two CMOS logic chips

Audio Systems - Communications:
A preamp with a.g.c. and a power amp with switched filtering for communications and surveillance

Motor Amplifier:
The power with which this unit can drive a heavy-duty motor is astonishing!

PIC-based Pain Monitor:
A patient welfare logger that also has other event logging applications as in sailing, golfing or wildlife watching, for example

Back to Basics - Part 5 - Kitchen Timer and Room Thermometer:
Continuing our series of simple, easy-to-build circuits based on one or two CMOS logic chips

PIC-based Cybervox:
How to linguistically challenge those evil Daleks in their own dialect

LF and VLF Converter:
Circuits for exploring the lower reaches of the electromagnetic spectrum

Mult-clap Switch:
A far more controllable and responsive unit than conventional designs

Back to Basics - Part 4 - Doorchime; Electronic Dice:
Continuing our series of simple, easy-to-build circuits based on one or two CMOS logic chips

Super-ear Audio Telescope:
Listen more clearly to those distant sounds

PIC-based Radio Control Model Switcher:
A radio-controlled power switch for models and other devuces

PIC-based Ultrasonic Radar:
Let your mobile robot "listen" to the landscape with thsi experimental system

Back to Basics - Part 3 - Scarecrow; Digital Lock:
Continuing our series of simple, easy-to-build circuits based on one or two CMOS logic chips

PIC-based Crossword Solver:
Even The Times could become a doddle!

20W Amplifier Module:
Low-cost, single-chip, 20W wide-band low distortion mono/stereo amplifier module

DAB Radio Aerial:
A loft-mounted quarter-wave ground plane antenna for digital radio reception

Back to Basics - Part 2 - Water Level Detector; Burglar Alarm:
Continuing our series of simple, easy-to-build circuits based on one or two CMOS logic chips

PIC-based Smart Kart Robot Buggy - Part 8:
Discussing the final software routines for our mobile buggy

Safety Interface:
A flexible safety interface for a PIC/Logic/PC to mains power controller

Spontaflex 550 kHz to 30 MHz Radio Receiver:
A modern-day update of Sir Douglas Hall’s famous Spontaflex circuit

Back to Basics - Part 1 - Introduction; Fridge/Freezer Door Alarm:
A new series of simple, easy-to-build circuits based on one or two CMOS logic chips

PIC-based Smart Kart Robot Buggy - Part 7:
Our buggy metamorphs and PICs up the art of cybernetic singing and dancing!

Cat Flap:
Electronically deter stray moggies from invading your cat’s private door

Stereo Headphone Monitor:
Usable as an add-on for last month’s Sound Card Mixer or as a stand-alone unit

PIC Electric MK2 - Part 2:
Monitor the cost of running your mains electrical appliances

PIC-based Bingo Box:
PIC those random numbers without a traditional bag!

PIC-based Smart Kart Robot Buggy - Part 6:
Discussing the third set of software routines for our PIC-based buggy

PIC Electric MK2 - Part 1:
Monitor the cost of running your mains electrical appliances

PIC-based Sneaky:
A covert communication system for magicians and spies!

Sound Card Mixer:
Bring “life” to your computerised live recordings

PIC-based Smart Kart Robot Buggy - Part 5:
Our mobile robot morphs into SK-3 and gains a "grabber" and "pusher"

PIC-based Speed Camera Watch:
Be forewarned about known hazards while you're driving

Light Detector:
An unusual design which uses an LED both as the light sensor and indicator

Gate Alarm:
Baffle callers to your home with this low-cost, delayed action versatile alarm

PIC-based Smart Kart Robot Buggy - Part 4:
Discussing the second set of software routines for our PIC-based buggy

Super Vibration Switch:
So sensitive that even dropping a pin can trigger it!

Versatile PIC Flasher MK2:
Place your favorite flasher under environmental control

Wind Direction Indicator:
Simple mechanical monitoring of relative wind direction through 16-segments

PIC-based Smart Kart Robot Buggy - Part 3:
Adding three levels of extra sensory perception to your mobile buggy!

Thunderstorm Monitor:
An early warning monitor of pending thunderstorms

Logic Probe:
A handy tool for the tri-state monitoring of logic circuits

M.W. Ampliture Modulator:
Enjoy your listening as you used to through your radios of bygone eras

PIC-based Smart Kart Robot Buggy - Part 2:
Discussing the first software routines for our PIC-based mobile buggy

PIC-based Moon and Tide Clock Calendar:
A pictorial guide to tracking lunar and tidal states throughout the year!

Volts Checker:
A handy tester suitable for universal AC and DC supplies!

EPE Theremin:
Create "handsfree" weird and wonderful music!

PIC-based Smart Kart Robot Buggy - Part 1:
Commencing construction of a PIC-based mobile buggy with various sensors and actuators. Suitable of tailoring to your needs.

PIC-based Rainbow Lighting Controller:
Brighten up your garden's night-time color scheme!

PIC-based Radio Control Failsafe:
How to keep your RC models safely controlled and prevent mayhem!

EPE Wart Remover:
Exterminate those unwanted warts!

PIC-based Alphamouse Game:
Let that mouse sort out those shifty characters!

EPE PIC-based Scorer:
Score with the technological solution for quizmasters and sportsmasters!

Keyring LED Torch (Flashlight):
An "easy-build" totch that will give many hours of pleasure

EPE PIC Magnetometry Logger - Part 2:
Logging your search for magnetic fields that might reveal hidden artifacts

Simple FM Radio:
An out-of-the-rut domestic receiver

Portable Mini Alarm:
Covertly monitor your property and distinguish between loiterers and passers-by

PIC-based Bongo Box:
PIC up the rhythm with our MIDI finger drum!

EPE PIC Magnetometry Logger - Part 1:
Logging your search for magnetic fields that might reveal hidden artifacts

Hard Drive Warbler:
Monitor your PC’s hard drive activity from a distance

PIC Quickstep:
A simple and versatile stepper motor driver and controller

Body Detector MkII:
Create your own invisible defense shield!

PIC-based MIDI Synchronome:
Improve your musical time-keeping when recording MIDI instruments.

Low Frequency Wien Oscillator:
A simple low-cost sinusoidal signal generator for you workshop.

In-Car Laptop PSU:
Laptop operation for the outwardly bound

Beat Balance Metal Detector:
A new genre of detector that is inexpensive and easy to build.

EPE PIC-based Seismograph Logger - Part 2:
Discussing the software and use of our long-term data logger.

EPE PIC-based Seismograph Logger - Part 1:
Long-term data recording of the earth's rock-and roll events

PIC- Based Moon Clock:
A Timely display for romantics and werewolves

Loft Light Alarm:
Darken your lightness! A Low cost energy-saving versitile lights-on reminder

Infra-Guard Monitor:
In-Car Protection for young children

Bat-Band Converter:
Listen-in the world of bats with this low-cost b.f.o. detector

Emergency Stand-By Light:
A 12V battery-powered home emergency light using a low-energy mains lamp

PIC-based MIDI Health Check:
Check out your MIDI home studio with this transmitter-reciever pair

PIC-based Mixer For RC Planes:
A flight command mixer for delta and V-tail radio-controlled model planes

PIC LCF meter:
Simple monitoring of inductance, capacitance and frequency values

Sonic Ice Warning:
Don’t let the icy road catch you out!

Jazzy Necklace:
Be the light and soul of your party or disco!

PIC Tug-Of-War:
PIC up the battle rope without the brute force!

PIC-based Car Computer:
An aid for motorists who don’t live with a mechanic!

Top Tenners: Bedside Nightlight:
A two-in-one design that will bring comfort and joy to your youngster’s room.

PIC-based Watering Timer:
Keep your plants in pristine condition before you PIC them!

Practical Radio Circuits – Part 8:
The double-conversion Superhet (Prescaler, Mixers and Oscillators)

PIC NIM Machine:
Nimbly PIC a winning pile! Latest incarnation of the ancient Chinese game.

PIC Virus Zapper MK2:
An alternative method that could keep those bugs at bay!

Christmas Cheeks:
A novel technological way to decorate you for the festivities!

Practical Radio Circuits – Part 7:
The Superhet (Prescaler, Mixers and Oscillators)

PIC Random LED Flasher:
Enjoy the fun of an interesting and attractive pattern display.

Anyone At Home?:
Logically deter those shifty characters eyeing up your house!

Top Tenners: Cardboard Clock:
An intriguing and novel way in which you can tick-off time passing!

Practical Radio Circuits – Part 6:
Single-sideband and direct conversion.

RC Car Wars:
It’s a bit like Robot Wars without the expense or destruction!

Serial Interface for PICs & VB8:
Serial hardware plus standalone license-free OCX software.

Top Tenners: Spooky Bug:
Hocus-pocus, get your Halloween party off to a shriek!

Practical Radio Circuits – Part 5:
A highly sensitive receiving system and buffer amplifier.

PIC-A-Colour Game:
PIC your wits against a colourful code-setting mastermind!

Top Tenners: Vibration Alarm:
Guard your property by sounding an alarm whenever it is disturbed!

Top Tenners: Priority Referee:
Decide which of two players was really the first.

EPE PIC Met Office - Part 2:
Forget the seaweed and the proverbs, and let technology cater for your insatiable interest in the weather!

Practical Radio Circuits – Part 4:
Tuning systems, coils, and coil packs for general coverage and the amateur bands

Alarm System Fault Finder:
A low-cost fault finder that will find a faulty sensor without the alarm system going off incessantly!

EPE PIC Met Office - Part 1:
Forget the seaweed and the proverbs, and let technology cater for your insatiable interest in the weather!

Top Tenners: Master/Slave Intercom:
An intercom has many uses around the home and office, including acting as a baby alarm.

Top Tenners: Electronic Two-Up:
Chance your luck with this novel game!

Practical Radio Circuits – Part 3:
Dispelling the mysteries of radio. A new series featuring a variety of practical circuits for the set builder and experimenter. (Regeneration, Q-Multiplier, Reflex Radio, Speaker Amplifier)

EPE Mini Metal Detector:
Become the proud owner of a low-cost, wrist-band metal detector … plus a useful companion to your main "search tool."

Low Range Ohmmeter Adaptor MK2:
Improved accuracy when measuring low resistance

Practical Radio Circuits – Part 2:
Dispelling the mysteries of radio. A new series featuring a variety of practical circuits for the set builder and experimenter. (Regeneration, Q-Multiplier, Reflex Radio, Speaker Amplifier)

Top Tenners: Ultimate Egg Timer:
Our first project in this series is a handy device for timing eggs, telephone calls, player’s moves in games like chess, and for how long you brush your teeth!

PICronous LED Wall Clock – Part 2:
Ancient and modern techniques display timely brilliance on a grand scale!

PIC-based Fido Pedometer:
Keeping Track of How Far You’ve Walked!

Practical Radio Circuits - Part 1:
Dispelling the mysteries of radio. A new series featuring a variety of practical circuits for the set builder and experimenter. (Headphone Amplifier)

Back to Basics - Part 5:
Illustrating how transistors can create useful designs (this month’s designs are a Mini Theremin and a light-sensitive Twilight Switch).

PICronos LED Wall Clock - Part 1:
Ancient and modern techniques display timely brilliance on a grand scale!

Super Motion Sensor:
A highly responsive design that even detects a single finger moving at five metres!

Door Chime:
Give your front door that “ding-dong” appeal of yesteryear!

Back to Basics - Part 4:
Illustrating how transistors can create useful designs (this month’s designs are a Live Wire Detector and Medium Wave Radio).

PIC-based Earth Resistivity Logger - Part 2:
Help your local archaeological society to locate and reveal the hidden mysteries of our ancestors.

Atmospherics Monitor:
Tune in to the sounds of the heavens in turmoil!

PIC-based Intelligent Garden Lights Controller:
An easy-to-build lights controller that knows when it’s time to switch off.

Back to Basics - Part 3:
Illustrating how transistors can create useful designs (this month’s designs are a Touch Light and a Plant Watering Reminder).

PIC-based Earth Resistivity Logger:
Help your local archaeological society to locate and reveal the hidden mysteries of our ancestors.

Wind-up Torch (Flashlight) Mk II:
Wind-up Torch (Flashlight) Mk II

PIC-based Driver Alert:
A thinking time reaction tester – award-winning design in the Young Electronic Designer Awards 2002.

200 kHz Function Generator:
Versatile test gear that generates sine, square and triangle-wave outputs, with controllable amplitude.

Back to Basics - Part 2:
Illustrating how transistors can create useful designs (this month’s designs are a Metal Detector and a Simple Timer).

PIC-based Brainibot Buggy:
A low-cost, easy-build buggy that has a mind of its own!

PIC-based Wind Tunnel:
Scientifically investigate Nature’s second essential element.

Back to Basics - Part 1:
Illustrating how transistors can create useful designs Hearing Aid, Audio Power Amplifier.

Tesla High Voltage Transformer:
Spectacularly create your own sizzling DIY lightning!

EPE Minder:
Looks after your personal belongings – maybe even your children!

FM Frequency Surfer:
Trawl-in those unusual contacts on the 88MHz to 125MHz band.

PIC Wind Speed Meter:
Ultrasonic techniques replace mechanics and calibration.

PIC Chaser Lights:
The third part of a 3-part series using PICAXE devices.

Versatile PIC Flasher:
An attractive display to enhance your Christmas decorations or your child’s ceiling.

Door Defender:
Keep an armed guard on your door or valuables

PICAXE Projects - Part 2:
The second of a 3-part series using PICAXE devices - PIC microcontrollers that do not need specialist knowledge or programming equipment

EPE Hybrid Computer - Part 2:
Real-time computation of complex system behavior is greatly simplified by combining analogue and digital processing techniques

PIC-based Tuning Fork and Metronome:
Thrill everyone by at long last getting your instrument properly tuned!

Transient Tracker:
Solve a “spikey” problem with this easy-build mains transient detector

EPE Hybrid Computer - Part 1:
Real-time computation of complex system behavior is greatly simplified by combining analogue and digital processing techniques

PICAXE Projects - Part 1:
The first of a 3-part series using PICAXE devices - PIC microcontrollers that do not need specialist knowledge or programming equipment

EPE Bounty Treasure Hunter:
Inexpensive easy-build design that has good penetration and discrimination capabilities, helping you find the valuables, but not the iron and tin dross!

IC Tester:
Let a PIC and PC check the health of your digital logic chips!

Headset Communicator:
Ideal for directors who don't wish to shout - comprises master console and three slave units.

PIC Pocket Battleships:
Become a Sea Lord with our interpretation of the age-old pen and paper game!

Freebird Glider Control:
An automatic flight attitude control system for your free-flight model glider.

Portable Telephone Tester:
A useful tool for testing those bargain boot sale phones before you buy!

EPE Morse Code Reader:
Multi-function Morse code translation and learning aid; standalone plus optional PC interface.

Vinyl-to-CD Preamplifier:
Copy your old records to CD, and perhaps enhance their quality in the process!

Pickpocket Alarm:
Keep bags safe from the artful dodger!

PIC World Clock:
Graphically displays world map, calendar, clock and global time-zone data.

Big-Ears Buggy:
Sound-activated mobile "pet" buggy that follows your voice.

Simple Audio Circuits - Part 4 - Loudspeaker Enclosures, Tuning Oscillator and Resonance Detector:
A compendium of useful audio circuits for the experimenting constructor.

Infrared Autoswitch:
Keeps work-surface lights turned on only while you are near them.

EPE StyloPIC:
Have fun with a modern interpretation of a classic musical instrument!

Simple Audio Circuits - Part 3 - Power Supplies, Loudspeakers, Crossover Networks, and Filters:
A compendium of useful audio amplifier circuits for the experimenting constructor.

Rotary Combination Lock:
Pure logic and a "stack of cards" function enhance security.

BIOPIC Heartbeat Monitor:
Take a peek at the rhythmic waveforms that keep you ticking!

World Lamp:
Low cost lighting when there's no mains supply available.

Simple Audio Circuits - Part 2 - Preamps, Tone Controls, and Filters:
A compendium of useful audio amplifier circuits for the experimenting constructor.

Frequency Standard Generator:
High precision 1Hz to 100kHz frequency source, derived "off-air".

PIC-based Freezer Alarm:
How to prevent your food from defrosting unexpectedly.

PIC Big-Digit Display:
Control the giant ex-British Rail platform clock 7-segment digits that are now available on the surplus market.

Simple Audio Circuits - Part 1 - Power Amplifiers:
A compendium of useful audio amplifier circuits for the experimenting constructor.

Washing Ready Indicator:
Has the washing machine finished? - Avoid those washday blues.

Electric Guitar Tuner:
Six fixed frequencies and an l.e.d. help you to stay in tune.

PIC-Controller Intruder Alarm:
A sophisticated multi-zone intruder detection system that offers deluxe monitoring facilities.

Manual Stepper Motor Controller:
Illustrates how a 4-phase stepper motor can be controlled bi-directionally using a conventional rotary switch.

Solar Charge-and-Go:
Use solar power to charge your 2·4V or 3·4V NiCad and nickel metal hydride mobile phone batteries.

MK484 Shortwave Radio:
The MK484 is a replacement for the once-popular ZN414 radio receiver IC.

RH Meter:
How healthy is the moisture content in your home? By monitoring its relative Humidity you can then take steps to control it.

PIC Virus Zapper:
Can disease be cured electronically? Investigate this controversial subject for yourself!

PIC Mini-Enigma:
Share encrypted messages with your friends -- true spymaster entertainment!

Guitar Practice Amp:
A low-cost amplifier that will allow the budding guitarist to improve his/her playing technique, without annoying the household or neighbors!

HT Power Supply:
Power your favorite antique valve radio!

PIC Spectrum Analyzer:
PIC-controlled PC interface for analyzing analog waveforms and displaying their harmonic content.

Versatile Current Monitor:
Monitors equipment current flow and warns if it changes significantly.

PIC Magick Musick:
Conjure music from thin air at the mere untouching gesture of a fingertip.

Time Delay Touch Switch:
Automatically turns off lights after a preset period.

Versatile Bench Power Supply:
A well-proven power supply that provides 0V to 20V with current limiting in two ranges of 100mA and 1A.

Forever Flasher:
A novel flashing LED that could run for over 20 years on a 9V lithium battery or "forever" using the "free energy" from a TV aerial or similar.

Twinkling Lights:
A beautiful four-channel lighting effect for your Christmas tree or festive party.

Mains Failure Alarm:
Protect your freezer or fish tank contents, or monitor mains connections.

Ghost Buster:
Spooky feelings all around you? Track down their source!

PIC Polywhatsit:
A novel compendium of musical effects to delight the creative musician.

Capacitance Meter:
Allows any capacitor type to have it's true value readily measured.

Teach-In 2002 Power Supply:
Supplies +/-12V and +5V at 600mA.

Lights Needed Alert:
Ensure your car can be seen when driven in poor lighting conditions.

Pitch Switch:
A novel sound-operated switch with precise frequency response.

Camcorder Power Supply:
Battery replacement with a lot more bottle!

PIC Toolkit Mk3:
By popular demand - an enhanced PIC microcontroller programming development board.

2-Valve Shortwave Radio:
Designed for valve (vacuum tube) radio enthusiasts, or anyone who would like to try the nostalgic approach to shortwave listening.

Perpetual Projects - Part 4:
Three more solar-powered projects - Gate Sentinel, Bird Scarer, and In-Out Register.

Water Monitor:
How costly is it to keep your garden watered? Find out and control it.

LED Super Torches (Flashlights):
Two high-tech (one super-high-tech) designs to brighten your nights.

Perpetual Projects - Part 3 - Loop Alarm, Touch Switch, Rain Alarm:
Three more solar-powered projects - Loop Burglar Alarm, Touch-Switch Door-Light, Solar-Powered Rain Alarm - plus seven suggestions for variants.

Synchronous Clock Driver:
By popular request - a dual-frequency 50Hz/60Hz converter for mains-operated synchronous clocks.

Digitimer:
Enhance your ease of viewing - build an add-on VCR record timer unit for Sky TV.

Lead-acid battery charger:
Keep your 6V and 12V batteries in a properly charged condition.

Perpetual Projects - Part 2 - LED Flasher and Double-Doorbuzzer:
Two more perpetual projects for which you can be "eternally" grateful!

Compact Shortwave Loop Aerial:
This Q-multiplied loop amplifies signals and nulls out electrical interference. Four plug-in loops covering 1.5MHz to 30MHz

Stereo/Surround Sound Amplifier:
An easy-to-build design whose effect, considering its inexpensive cost, is convincing!

PIC to Printer Interface:
How to use dot-matrix printers as data loggers with PIC microcontrollers.

Perpetual Projects - Part 1 - Solar-Powered Power Supply and Voltage Regulator:
Free power for your projects! The first in a new series.

MSF Signal Repeater and Indicator:
How to receive MSF radio clock signals in a shielded building.

Magfield Monitor:
A sophisticated fluxgate sensor monitors static and alternating magnetic fields and outputs processed signals to a meter and headphones.

Dummy PIR Detector:
An extremely inexpensive way to fool would-be intruders.

Hosepipe Controller:
How to avoid wasting money when watering your garden.

In-Circuit Ohmmeter:
Our final Top-Tenner ("Beginners") project enables you to measure in-circuit resistance.

PIC Graphics LCD Scope:
Long awaited, a PIC and graphics LCD signal monitor for your workshop.

Camcorder Mixer:
Enhance the sound of your home video productions.

DC Motor Controller:
Simply and inexpensively control low-voltage motors or lamps with this month's "Top Tenner" (beginner's) project.

Intruder Alarm Control Panel - Part 2:
Concluding the 5-zone micro-controlled security system designed to meet British Standards specification BS4737.

Wave Sound Effect:
Let the susurration of the waves soothe intrusions on your senses.

Intruder Alarm Control Panel - Part 1:
5-zone micro-controlled security system designed to meet British Standards specification BS4737.

Sound Trigger:
Using a sound trigger/switch to soundly lighten your darkness.

EPE Snug-Bug:
Treat your tropical pets to a personalized 4-channel central heating system.

Doorbell Extender:
Through-the-mains controller links your doorbell and garage or workshop, plus remote appliance switching.

Body Detector:
Create your own "invisible shield" and let the force be with you!

DIY Tesla Lightning:
Build a giant Tesla Coil and challenge Zeus at creating lightning!

Circuit Tester:
Simply check for open and short circuits with another "Top-Tenner" project.

Ice Alert:
Tri-color LED warns motorists and gardeners of impending frost danger.

Simple Metronome:
Have a good musical time with another "Top Tenner" beginner's project.

PC Audio Power Meter:
Measure audio amplifier power output via your PC computer.

Special Supplement:
"How to use graphics liquid crystal displays (LCDs) with PICS"
This step-by-step guide to understanding and using pixel-matrixed graphics LCDs with your PIC microcontroller projects is available for FREE from the EPE Online Library.

Versatile Optical Trigger:
A "Top Tenner" (beginner) project for light-controlling electrical equipment.

UFO Detector and Event Recorder:
Charting the X-files revolution.

Two-Way Intercom:
How to create your own local two-way chat zone.

PIC-Monitored Dual PSU - Part 2:
Workshop power supply with multiple options and monitoring of voltage and current using a PIC microcontroller plus LCD readout.

PIC-Monitored Dual PSU - Part 1:
Workshop power supply with multiple options and monitoring of voltage and current using a PIC microcontroller plus LCD readout.

Static Field Detector:
An amusing "electroscope" starter project that reveals if your friends are "highly charged"!

Motorists' Buzz-Box:
A multipurpose piece of test equipment for the intrepid car owner.

Sample-and-Hold:
A Top-Tenner add-on unit for your multimeter.

Opto-Alarm System:
Keep would-be intruders at bay with this portable, optically balanced security alarm.

PIC Pulsometer:
Accurately measures and displays timings, frequency, and capacitance.

Handclap Switch:
Let there be light - quick鷼ĺs ￿￿e ��ap��rs!

Wind-Up Torch/Flashlight:
An occasional twist of a knob provides light without battery power.

PIC-based Dual-Channel Virtual Oscilloscope:
A virtual oscilloscope interface for monitoring audio frequency signals via your computer.

Fridge/FreezerAlarm:
Another "Top-Tenner" project - audibly warns of imminent money loss!

EPE Moodloop Field Strength Indicator:
Check that your Moodloop's loop is working, and find the sources of 50HZ mains fields.

Steeplechase Game:
Another "Top Tenner" design - how well can your horse jump the fences?

Active Ferrite Loop Aerial:
Superbly designed vertically and horizontally rotating reception optimizer.

EPE Moodloop Power Supply:
Stably power your Moodloop (see August 2000 projects) and other 13.2V or 12V 1A designs.

PIC-based Remote Control IR Decoder:
Allows PIC programming enthusiasts to remotely control their designs.

Handy Amp:
A simple multi-purpose amplifier with built-in speaker and headphone output.

Quiz Game Indicator:
A low-cost fun project that cannot be questioned.

EPE Moodloop:
Have a relaxing "field-day" (or night) with our latest PIC-based brainwave generator.

Door Protector:
The first in a series of "Top-Tenner" projects, featuring simple designs that can be built for around 10 UK pounds (16 US dollars).

Camera Shutter Timer:
Make sure that you get the right exposure with this simple starter design.

g-Meter:
Use a space-age chip to measure g-forces.

PIC-Gen Frequency Generator/Counter:
Expand your test capability with this versatile PIC-based test equipment.

Atmospheric Electricity Generator - Part 2:
Investigate Nature's power-house with this intriguing experimental design.