Projects in the May 1999 issue of EPE Magazine

PIC Toolkit Mk 2
A revised version of our popular PIC Toolkit (July '98), this all-new PIC programming tool is a real pleasure to use. It supports PIC16F87x series as well as the PIC16x84. All-new DOS-based software helps you configure PICs, program, assemble, translate .hex/ .obj, TASM/ MPASM

PIC Toolkit Mk 2 is now obsolete and you should use the TK3 (Toolkit Mk3) - October 2001 issue.

AM/ FM Radio Remote Control
No licence needed in the UK for this system which uses pre-tuned RF modules. Range typically 100 metres in free space. Fully detailed transmitter and receiver project with four relay outputs. Hand-held transmitter has four keyswitches (pictured above). Based on the Holtek HT6014 transmitter / HT6034 decoder chipset, this design will find many control uses around the home.

MIDI Handbells
Our MIDI Hand Bells is a form of MIDI interface that connects to an instrument's MIDI input, which is set up to produce a desired sound (e.g. bells). A set of eleven switches can then be used, each held by an individual user. By operating the switches in the correct sequence, a melody can be created in much the same way that hand bells are played. PIC microcontroller based project.

In the August 99 issue (P.575) we said that on P. 327 Fig, 3, the negative lead of the electrolytic capacitor C2, connected to row K25, is incorrect. It should of course go to row J25, the 0V track.

Special Feature: PC Engines from 4004 to Pentium® III
I'll see your PII and raise you two Celerons! This must-read article documents the development of the Intel microprocessor. Love it or loathe it, there's no denying its widespread adoption in the desktop and workstation computer industry, and this authoritative article by an industry insider lays bare how the microprocessor has evolved from its humble beginnings as a 23,000 transistor chip to today's 7.5 million monoliths. Also discusses surrounding technical jargon. If you don't know your DIMMs from your cache from your Xeons, this article is for you.

PhizzyB Computers Part 7
Let's get PhizzyCal, PhizzyCal...... Ahem. Sorry. In the last constructional article of this highly-regarded series, our PhizzyBot is fitted with the l.d.r. array, and it will move towards a source of light, correcting its route as it travels. Demonstrates command and control principles. The computer tutorial series written exclusively for EPE by "Max" Maxfield and Alvin Brown of Maxfield & Montrose Interactive Inc. uses a unique mix of practical build-it-yourself hardware and CD ROM software to provide the best insight into computer programming & control methods. Don't miss this great educational series which is a barrel of laughs and great fun! Remember, back issues are available!

Please note, the PhizzyB hardware is now almost obsolete, with few kits or MCU chips remaining. Please check all parts are available before commencing construction.

Also - New Technology Update: Ian Poole describes new bonding techniques which enhance power handling for IGBTs. Circuit Surgery - a close-up on current sources, current mirrors in this very popular regular column. Practically Speaking offers more project-building hints and tips. Readout - points arising from readers' questions and comments. All this and more - including a giant-size FREE wallchart of 74-series chip data.