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Copyright 2004, Wimborne Publishing Ltd
(408 Wimborne Road East, Ferndown, Dorset, BH22 9ND, UK)
and TechBites Interactive Inc.,
(PO Box 857, Madison, Alabama 35758, USA)
All rights reserved.
WARNING!
— which are made
available by Wimborne Publishing Ltd and TechBites Interactive Inc —
are copyrighted. You are permitted to make a backup copy of the downloaded file
and one (1) hard copy of such materials and works for your personal use.
International copyright laws, however, prohibit any further copying or
reproduction of such materials and works, or any republication of any kind.
TechBites Interactive Inc and Wimborne Publishing Ltd have used
their best efforts in preparing these materials and works. However, TechBites
Interactive Inc and Wimborne Publishing Ltd make no warranties of
any kind, expressed or implied, with regard to the documentation or data
contained herein, and specifically disclaim, without limitation, any implied
warranties of merchantability and fitness for a particular purpose.
e, its publishers and agents disclaim
any responsibility for the safe and proper functioning of reader-constructed
projects based on or from information published in these materials and works.
In no event shall TechBites Interactive Inc or Wimborne Publishing Ltd
be responsible or liable for any loss of profit or any other commercial damages,
including but not limited to special, incidental, consequential, or any other
damages in connection with or arising out of furnishing, performance, or use of
these materials and works.
The materials and works contained within EPE Online
Because of possible variances in the quality and condition of materials and
workmanship used by readers, EPE Onlin
ISSN 0262 3617
PROJECTS . . . THEORY . . . NEWS . . .
COMMENTS . . . POPULAR FEATURES . . .
VOL. 33. No. 6 JUNE 2004
Cover illustration by jgr22
www.epemag.wimborne.co.uk
EPEOnline: www.epemag.com
Projects and Circuits
PIC QUICKSTEP by Andy Flind
376
A simple and versatile stepper motor driver and controller
INGENUITY UNLIMITED – Sharing your ideas with others
382
White Noise Generator; Pressure Pad; Dual-Mode Charger; Simple Siren
CRAFTY COOLING by Terry de Vaux-Balbirnie
392
Make a drink can cooler and learn about Peltier and Seebeck effects
BODY DETECTOR Mk2 by Thomas Scarborough
398
Create your own invisible defence shield!
MIDI SYNCHRONOME by David Clark
408
Improve your musical time-keeping when recording MIDI instruments
Series and Features
CLINICAL ELECTROTHERAPY by Ed Bye
386
Electrotherapy developments through the ages, and some
possible future progress
TECHNO TALK by Andy Emmerson
396
Not surprisingly, self-destructing electronic products are a mixed blessing!
INTERFACE by Robert Penfold
406
More practical suggestions for case-modding your PC
PIC N’ MIX by Andrew Jarvis
414
A potted history of EPEToolkit and an overview of other
low-cost PIC programmers
NET WORK – THE INTERNET PAGE surfed by Alan Winstanley
419
Google, Alta Vista, MSN and Yahoo! web search engines
TEACH-IN 2004 – 8. Movement Detection by Max Horsey
420
Continuing our 10-part tutorial and practical series – how to
apply electronics meaningfully
CIRCUIT SURGERY by Alan Winstanley and Ian Bell
426
Power Op.Amps; Servo Controller; Brazen Terminology;
Current Flow and Outputs
Regulars and Services
PIC PROJECTS VOL 1 CD-ROM Invaluable to all PICkers!
370
A plethora of 20 “hand-PICked” EPE past projects
EDITORIAL
375
NEWS – Barry Fox highlights technology’s leading edge
384
Plus everyday news from the world of electronics
READOUT John Becker addresses general points arising 403
BACK ISSUE CD-ROMS Single-source shopping for issues you’ve missed 404
SHOPTALK with David Barrington
415
The essential guide to component buying for EPE projects
PLEASE TAKE NOTE
415
Toolkit TK3 software update
CD-ROMS FOR ELECTRONICS
416
A wide range of CD-ROMs for hobbyists, students and engineers
DIRECT BOOK SERVICE
428
A wide range of technical books available by mail order, plus more CD-ROMs
PRINTED CIRCUIT BOARD AND SOFTWARE SERVICE
431
PCBs for EPE projects. Plus EPE project software
ELECTRONICS MANUALS
© Wimborne Publishing Ltd 2004. Copyright in all
drawings, photographs and articles published in
EVERYDAY PRACTICAL ELECTRONICS is fully
protected, and reproduction or imitations in whole or
in part are expressly forbidden.
432
Essential CD-ROM reference works for hobbyists, students
and service engineers
ADVERTISERS INDEX
436
Our July 2004 issue will be published on
Thursday,10June 2004.See page 367 for details
Readers Services
Editorial and Advertisement Departments 375
Everyday Practical Electronics, June 2004
365
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NEXT MONTH
EPE PIC MAGNETOMETRY
LOGGER
Magnetometers are instruments for measuring the direction
and/or intensity of magnetic fields. Such fields are created by
electrical current flow and also exist naturally in
ferromagnetic substances, such as iron and nickel. It is the
latter fields that this magnetometer has been designed to
detect, particularly those associated with man’s activities.
This design is PIC-controlled and uses two FGM-3 fluxgate
sensors from Speake & Co who describe them as “very high
sensitivity magnetic field sensors operating in the ±50
microtesla range”, which covers the Earth’s magnetic field.
Their applications include conventional magnetometry,
ferrous metal detectors, magnetic material measurement and
archaeological artifact assessment.
Data is recorded by the PIC to on-board memory, from
where it can later be downloaded to a Windows-based PC
for visual analysis.
PORTABLE MINI ALARM
This is a unit that should find many applications within home
and business security.Battery-powered and about the size of
a small brick, it can be simply placed at the area to be
protected, switched on and left.Intruders entering the area will
trigger a siren that is loud enough to alert anyone nearby.
The circuit features “pulse counting”that enables it to
distinguish between passers-by and someone loitering,
perhaps with “intent”, in the protected area.The count can be
adjusted by the user for the desired degree of immunity from
false alarms.The battery life will depend upon the number of
detections and alarms, but the circuit is a micro-power design
and is capable of remaining “on guard”for periods well in
excess of a year.
BONGO BOX
The Bongo Box is for budding drummers everywhere
who like to tap out a rhythm with their fingertips on
any available surface.This project is guaranteed to
make such individuals even more annoying to any
partner, parent or pet in the vicinity!
In fact, the Bongo Box could be of serious use to
anyone involved in playing or recording music using
MIDI(Musical Instrument Digital Interface) controlled
instruments.Any box or enclosure can be turned into
an electronic drum by placing this design inside it
and linking it to a PC.The response of the device is
rapid, and drumming your fingers on the box causes
a series of drum sounds to be played in quick
succession.
This a great improvement over the usual situation
where a MIDI keyboard is used to trigger sounds –
normally it is not possible with a keyboard to mimic
the quick “rolls”that drummers play.The Bongo Box
makes this technique possible, without having to go
to the expense of buying an electronic drum kit!
FRONT PANEL FINISHING
Adding the finishing touches to your project can be a time-
consuming and laborious task, and the results may not be as
professional as you would have liked!However, with the use of
a home PC, professional looking front panel overlays can be
quickly and easily produced.This article shows you how.
P L U S
TEACH-IN 2004 – PART 9 LOCK AND ALARM SYSTEMS
NO ONE DOES IT BETTER
DON'T MISS AN
ISSUE – PLACE YOUR
ORDER NOW!
Demand is bound to be high
JULY 2004 ISSUE ON SALE THURSDAY, JUNE 10
Everyday Practical Electronics, June 2004
367
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Quasar Electronics Limited
PO Box 6935, Bishops Stortford,
CM23 4WP
Tel: 0870 246 1826
Fax: 0870 460 1045
E-mail: sales@quasarelectronics.com
Add £3.00 P&P to all UK orders or 1st Class Recorded – £5.
Next day (insured £250) – £8. Europe – £6. Rest of World – £10
(order online for reduced price UK Postage).
We accept all major credit/debit cards. Make cheques/POs
payable to Quasar Electronics Limited.
Prices include 17.5% VAT. MAIL ORDER ONLY.
Call now for our FREE CATALOGUE with details of over 300
high quality kits, projects, modules and publications.
0 8 7 1
CREDIT CARD
SALES 717 7168
717 7168
Helping you make the right connections!
PIC & ATMEL Programmers
We have a wide range of low cost PIC and
ATMEL Programmers. Complete range and
documentation available from our web site.
Programmer Accessories:
40-pin Wide ZIF socket (ZIF40W) £15.00
18VDC Power supply (PSU020) £5.95
Leads: Parallel (LEAD108) £4.95 / Serial
(LEAD76) £4.95 / USB (LEADUAA) £2.95
ABC Maxi AVR Development Board
The ABC Maxi board
has an open architec-
ture design based on
Atmel’s AVR
AT90S8535 RISC
microcontroller and is
ideal for developing new designs.
Features:
8Kb of In-System Programmable Flash
(1000 write/erase cycles)
512 bytes EEPROM
512 bytes
NEW! DTMF Telephone Relay Switcher
Call your phone number
using a DTMF phone from
anywhere in the world
and remotely turn on/off
any of the 4 relays as
desired. User settable
Security Password, Anti-Tamper, Rings to
Answer, Auto Hang-up and Lockout.
Includes plastic case. 130 x 110 x 30mm.
Power: 12VDC.
Kit Order Code: 3140KT – £39.95
Assembled Order Code: AS3140 – £49.95
8 analogue inputs (range 0-5V)
4 Opto-isolated Inputs (I/Os are
bi-directional with internal pull-up resistors)
NEW! USB ‘All-Flash’ PIC Programmer
USB PIC programmer for all
‘Flash’ devices. No external
power supply making it truly
portable. Supplied with box
and Windows Software. ZIF
Socket and USB Plug A-A lead
not incl.
Kit Order Code: 3128KT – £39.95
Assembled Order Code: AS3128 – £49.95
Output buffers can sink 20mA current
(direct l.e.d. drive)
Serial Port Isolated I/O Module
Computer controlled
8-channel relay
board. 5A mains
rated relay outputs
and 4 opto-isolated
digital inputs (for
monitoring switch
states, etc). Useful in a variety of control
and sensing applications. Programmed via
serial port (use our new Windows interface,
terminal emulator or batch files). Serial
cable can be up to 35m long. Includes
plastic case 130 x 100 x 30mm. Power:
12VDC/500mA.
Kit Order Code: 3108KT – £54.95
Assembled Order Code: AS3108 – £64.95
4 x 12A open drain
MOSFET outputs
RS485 network
connector
2-16 LCD Connector
3·5mm Speaker Phone Jack
Supply: 9-12VDC.
The ABC Maxi STARTER PACK includes
one assembled Maxi Board, parallel and
serial cables, and Windows software
CD-ROM featuring an Assembler,
BASIC compiler and in-system
programmer.
Order Code ABCMAXISP – £79.95
The ABCMaxi boards only can also be
purchased separately at £59.95 each.
Enhanced “PICALL” ISP PIC Programmer
Will program virtually ALL 8
to 40 pin PICs plus certain
ATMEL AVR, SCENIX SX
and EEPROM 24C devices.
Also supports In System
Programming (ISP) for PIC
and ATMEL AVRs. Free software. Blank chip
auto detect for super fast bulk programming.
Requires a 40-pin wide ZIF socket (not
included)
Assembled Order Code: AS3144 – £59.95
Controllers & Loggers
Here are just a few of the controller and data
acquisition and control units we have.
See website for full details. Suitable PSU for
all units: Order Code PSU345 – £9.95
Infra-red RC 12-Channel Relay Board
Control 12 on-board relays
with included infra-red
remote control unit. Toggle
or momentary. 15m+ range.
112 x 122mm.
Supply: 12VDC/0·5A.
Kit Order Code: 3142KT – £41.95
Assembled Order Code: AS3142 – £51.95
ATMEL 89xxx Programmer
Uses serial port and any
standard terminal comms
program. 4 LEDs display
the status. ZIF sockets
not included. Supply:
16VDC.
Kit Order Code: 3123KT – £29.95
Assembled Order Code: AS3123 – £34.95
Rolling Code 4-Channel UHF Remote
State-of-the-Art. High security.
4 channels. Momentary or
latching relay output. Range
up to 40m. Up to 15 TXs can
be learned by one Rx (kit
includes one Tx but more
available separately).
4 indicator LEDs.
Rx: PCB 77x85mm, 12VDC/6mA (standby).
Two &Ten Channel versions also available.
Kit Order Code: 3180KIT – £41.95
Assembled Order Code: AS3180 – £49.95
PC Data Acquisition & Control Unit
Monitor and log a
mixture of analogue
and digital inputs
and control external
devices via the ana-
logue and digital
outputs. Monitor
pressure, tempera-
ture, light intensity, weight, switch state,
movement, relays, etc. with the apropriate
sensors (not supplied). Data can be
processed, stored and the results used to
control devices such as motors, sirens,
relays, servo motors (up to 11) and two
stepper motors.
NEW! USB & Serial Port PIC Programmer
USB/Serial connection.
Header cable for ICSP. Free
Windows software. See web-
site for PICs supported. ZIF
Socket and USB Plug A-A
lead extra. 18VDC.
Kit Order Code: 3149KT – £39.95
Assembled Order Code: AS3149 – £54.95
Computer Temperature Data Logger
Serial port 4-channel tem-
perature logger. °C or °F.
Continuously logs up to 4
separate sensors located
200m+ from board. Wide
range of free software appli-
cations for storing/using data.
PCB just 38x38mm. Powered
by PC. Includes one DS1820 sensor and
four header cables.
Kit Order Code: 3145KT – £19.95
Assembled Order Code: AS3145 – £26.95
Additional DS1820 Sensors – £3.95 each
Introduction to PIC Programming
Go from a complete PIC
beginner to burning your
first PIC and writing your
own code in no time!
Includes a 49-page step-
by-step Tutorial Manual,
Programming Hardware (with LED bench
testing section), Win 3.11–XP Programming
Software (will Program, Read, Verify &
Erase), and a rewritable PIC16F84A that
you can use with different code (4 detailed
examples provided for you to learn from).
Connects to PC parallel port.
Kit Order Code: 3081KT – £14.95
Assembled Order Code: AS3081 – £24.95
11 Analogue Inputs – 0·5V, 10 bit (5mV/step)
16 Digital Inputs – 20V max. Protection 1K in
series, 5·1V Zener
1 Analogue Output – 0-2·5V or 0-10V. 8 bit
(20mV/step)
8 Digital Outputs – Open collector, 500mA, 33V
max
Custom box (140 x 110 x 35mm) with printed
front & rear panels
Windows software utilities (3·1 to XP) and
programming examples
Most items are available in kit form (KT suffix)
or pre-assembled and ready for use (AS prefix).
Supply: 12V DC (Order Code PSU203)
Kit Order Code: 3093KT – £69.95
Assembled Order Code: AS3093 – £99.95
0 8 7
internal SRAM
Features
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