This page is a list of the last five years' of EPE constructional projects. Click on a month to see more details. You can buy back issues, reprints, electronics books and CDs online from our Online Shop. We accept Visa and Mastercard and we deliver worldwide. We do not send circuit diagrams or constructional details by e-mail.

January 2007 Balanced Microphone Pre-Amp for PA, karaoke and many other applications. Jumping Spider electronic version of the rubber bulb toy. High Efficiency Power Supply for 1W Luxeon Star LEDs. - use two D cells with our switch mode design. Deep Cycle 12V Lead Acid Charger - a very sophisticated design to charge and preserve batteries.

February 2007 Programmable Robot Buggy A PICAXE-08 powered mobile 'bot that is fully manoeuvrable and has programmable sound, light sensing and more besides! PIC Digital Geiger Counter - 4 line LCD data display and PC uploading, USB interface — a super challenge for advanced constructors. Courtesy (Dome) Light Delay for cars - opto isolated time delay fader for your car's interior light. Deep-Cycle Charger for 12V Lead Acid batteries (Part 2).

March 2007 PIC Polyphonium (Part 1) — create your own music on a computer with our PIC-powered musical project. Our Infra Red (IR) Remote Control Checker tests whether an IR remote is sending out a code when each of its buttons is pressed. Swimming Pool Lap Counter — this PICAXE powered counter tracks the number of lengths completed, leaving you to get on with your swimming. SMS Controller (Part 1) — using the convenience of SMS (text messaging) this design utilises an ordinary pre-pay only mobile phone to let you remotely-control equipment by sending plain texts, such as 'pump on' 'reset' 'blast horn' etc. and the unit can also text you to advise 'alarm activated' or similar.

April 2007 PIC Polyphonium (Part 2) — create your own music on a computer with our PIC-powered musical project. Students' 20W Amplifier — a robust 20W mono audio amp module that is very easy to build. Star Power Supply — drive Luxeon high power Star LEDs safely from a 12V supply. Ideal for automotive and marine use. SMS Controller (Part 2) — setup and usage.

May 2007 Energy Meter — accurately monitor energy usage for individual appliances and even calculates the running costs. Bass Extender — provides as much as an extra octave of bass response from your existing hifi speakers, as long as you are not using them at full power. Caravan Lights Tester — check your lighting without the need for an assistant. SMS Controller Add-Ons — three extra add-ons to interface with our SMS Controller (March/ April 2007): test jig, PIR sensor interface and low battery alarm.

June 2007 with FREE CD Bat Sonar — enables you to listen to bat's ultrasonic radar at frequencies up to 60kHz. 3V to 9V Converter - power a 9V project or apparatus from AA, C or D cells instead! Poor Man's Q-Meter In conjunction with a signal generator and voltmeter, inductance and "Q" can be measured quite accurately. Energy Meter (Part 2) calibration and setup.

July 2007 Video Reading Aid — enlarges small text and displays it on screen. Lead Acid Battery Zapper - can help rejuvinate 'sulphated' lead acid batteries. Digi-Flash Slave enhances indoor flash photography by driving a second 'slave' flash optically. Minical 5V Calibration Standard check out your DVM. Built -in frequency reference too.

August 2007 V2 PC Scope — a PIC and PC controlled hobbyist oscilloscope; RFID Security Module - contactless/ keyless entry for security systems etc; TwinTen Stereo Amplifier - great performance from a compact sized amp!; Printer Port Hardware Simulator - tests parallel equipment.

September 2007 Pocket T.E.N.S. Unit - electrical pain relief device, latest version. V2 PC Scope (Part 2) — a PIC and PC controlled hobbyist oscilloscope; Flexitimer - PICmicro-powered multi purpose programmable timer. USB Breakout Box - simple aid to help avoid USB port overloads.

October 2007 Standby Power Saver - turns off mains equipment using a wireless remote control. V8 Doorbell - sounds like a real engine! Inductance and Q Factor Meter - a wide range multifrequency inductance and Q-factor meter with digital display. Build Your Own Seismograph - display earth tremors on a PC

November 2007 TEACH-IN 2008 (PIC Microcontrollers) — PART ONE OF OUR FLAGSHIP EDUCATIONAL SERIES. USB Electrocardiograph - displays ECG on a PC. Vehicle Multi-Voltage Monitor - adaptable bargraph checks sensor levels or the battery; Experimenter's Audio System for radio experimenters. Inductance & Q-Factor Meter (2).

December 2007 PIC Speech Synthesiser — add the power of speech to your PIC projects. iPod and MP3 recharger — USB-level compatible voltage charger, works in-car or from a plugpack. Midi Drum Kit (Part 1) — sensational solid state musical instrument for use with a computer or synthesiser. AVR ISP Socketboard - helps with Atmel-based circuit development. Teach-In 2008 PIC Micro simple LED experiments.

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