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2003, Wimborne Publishing Ltd

(408 Wimborne Road East, Ferndown, Dorset, BH22 9ND, UK)

and TechBites Interactive Inc.,

(PO Box 857, Madison, Alabama 35758, USA)

WARNING!

The materials and works contained within

EPE Online

— which are made

available by Wimborne Publishing Ltd and Maxfield & Montrose 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.

Maxfield & Montrose Interactive Inc and Wimborne Publishing Ltd have used

their best efforts in preparing these materials and works. However, Maxfield &

Montrose 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.

Because of possible variances in the quality and condition of materials and

workmanship used by readers,

EPE Online,

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 Maxfield & Montrose 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.

POWERSAFE DEEP CYCLE BATTERIES

CoIour CCTV camera, 8mm lens, 12V d.c. 200mA 582x628

Resolution 380 lines Automatic aperture lens Mirror function PAL

Back Light Compensation MLR, 100x40x40mm. Ref EE2 £69

A small compact colour CCTV camera measuring just

35x28x30mm (camera body) Camera is supplied complete with

mounting bracket, built in lR, microphone and easy connect leads.

Built in audio Built in IR LEDs Colour 380 line resolution PAL 0.2

us +18db sensitivity. Effective pixels 628x582 Power source 6-12V

d.c. Power consumption 200mW £36. Ref EE16

6V 100AH NOW ONLY £19 EACH

Built-in Audio .15lux CCD camera 12V d.c. 200mA 480 lines

s/n ratio >48db 1v P-P output 110x60x50mm. Ref EE1 £99

Complete wireless CCTV sytem with video. Kit comprises pinhole

colour camera with simple battery connection and a receiver with

video output. 380 lines colour 2.4GHz 3 lux 6-12V d.c. manual

tuning Available in two versions, pinhole and standard. £79

(pinhole) Ref EE17, £79 (standard). Ref EE18

12V 51AH NOW ONLY £29.95 EACH

Small transmitter designed to transmit audio and video signals on

2.4GHz. Unit measures 45x35x10mm.ldeal for assembly into

covert CCTV systems Easy connect leads Audio and video input

12V d.c. Complete with aerial Selectable channel switch £30. Ref

EE19

We also have some used 2.3AH 12V (same as above) these are

tested and in good condition and available at an extremely good

price for bulk buyers, box of 30 just £49.99. Ref SLB23C

Metal CCTV camera housings for internal or external use. Made

from aluminium and plastic they are suitable for mounting body

cameras in. Available in two sizes 1 – 100x10x170mm and 2 –

100x70x280mm. Ref EE6 £22 EE7 £26 multi-position brackets.

Ref EE8 £8

2.4GHz wireless receiver Fully cased audio and video 2.4GHz

wireless receiver 190x140x30mm, metal case, 4 channel, 12V d.c.

Adjustable time delay, 4s, 8s, 12s, 16s. £45. Ref EE20

Excellent quality multi-purposeTV/TFT screen, works as just a

LCD colour monitor with any of our CCTV cameras or as a

conventional TV. Ideal for use in boats and caravans 49.7MHz-

91.75MHz VHF channels 1-5,168.25MHz-222.75MHz VHF

channels 6-12, 471.25MHz-869.75MHz, Cable channels

112.325MHz-166.75MHz Z1-Z7, Cable channels 224.25MHz-

446.75MHz Z8-Z35 5” colour screen. Audio output 150mW.

Connections, external aerial, earphone jack, audio/video input,

12V d.c. or mains, Accessories supplied Power supply, Remote

control, Cigar lead power supply, Headphone Stand/bracket. 5”

model £139 Ref EE9, 6” model £149. Ref EE10

Aiptek Pocket DV Up to 2000 still pics before requiring downloadl!

The all new Pocket DV, it’s amazing . . . such advanced technology,

such a tiny size – you will be the envy of your friends!! This camera

will take up to 3.5 minutes of Video and Audio, up to 2000 digital

still pictures or 30 minutes of voice recording! Then just connect it

to your PC via the USB cable (Supplied) and after transferring the

data you can start all over again!! £69. Ref POCKETDV

Colour pinhole cctv camera module with audio Compact colour

pinhole camera measuring just 20x20x20mm, built-in audio and

easy connect leads PAL CMOS sensor 6-9V d.c. Effective Pixels

628x582 Illumination 2 lux Definition >240 Signal/noise ratio

>40db Power consumption 200mW £35. Ref £35

Fully cased lR light source suitable for CCTV applications. The unit

measures 10x10x150mm, is mains operated and contains 54 infra-

red LEDs. Designed to mount on a standard CCTV camera bracket.

The unit also contains a daylight sensor that will only activate the

infra red lamp when the light level drops below a preset level. The

infrared lamp is suitable for indoor or exterior use, typical useage

would be to provide additional IR illumination for CCTV cameras.

£49. Ref EE11

Self-cocking pistol plcr002 crossbow with metal body. Self-cocking

for precise string alignment Aluminium alloy construction High tec

fibre glass limbs Automatic safety catch Supplied with three bolts

Track style for greater accuracy. Adjustable rearsight 50lb

drawweight 150ft sec velocity Break action 17” string 30m range

£21.65 Ref PLCR002

INFRA-RED FILM

6” square piece of

flexible infra-red film that will only allow IR light through. Perfect for

converting ordinary torches, lights, headlights etc to infra-red

output only using standard light bulbs Easily cut to shape. 6”

square £15. Ref IRF2 or a 12” sq for £29 IRF2A

NEW 12V 12”

SQUARE SOLAR PANEL

Kevlar backed, 3watt output. Copper

strips for easy solder connections £14.99. Ref 15P42

PACK OF 4

JUST £39.95. REF 15P42SP

The

smallest

PMR446

radios

currently

available

(54x87x37mm).These tiny handheld PMR radios not only look

great, but they are user friendly & packed with features including

VOX, Scan & Dual Watch. Priced at £59.99 PER PAlR they are

excellent value for money. Our new favourite PMR radios! Standby:

– 35 hours Includes: – 2 x Radios, 2 x Belt Clips & 2 x Carry Strap

£59.95 Ref ALAN1 Or supplied with 2 sets of rechargeable

batteries and two mains chargers £84.99. Ref Alan2

Beltronics BEL55O Euroradarand GATSO detector Claimed

Detection Range: GATSO up 400m. Radar & Laser guns up to 3

miles. Detects GATSO speed cameras at least 200 metres away,

plenty of time to adjust your speed £319. Ref BEL550

This device is mains operated and designed to be used with a

standard CCTV camera causing it to scan. The black clips can be

moved to adjust the span angle, the motor reversing when it

detects a clip. With the clips removed the scanner will rotate

constantly at approx 2.3rpm. 75x75x80mm £23. Ref EE12

Fully Portable – Use anywhere Six automatic programmer for full

body pain relief, shoulder pain, back/neck pain, aching joints,

rheumatic pain, sports injuries EFFECTIVE DRUG FREE PAIN

RELIEF TENS (Transcutaneous Electrical Nerve Stimulation) units

are widely used in hospitals, clinics throughout the United

Kingdom for effective drug free pain relief. This compact unit is

now approved for home use. TENS works by stimulating nerves

close to the skin releasing endorphins (natures anesthetics) and

helping to block the pain signals sent to the brain. Relief can begin

within minutes, and a 30 minute treatment can give up 12 hours

relief or more. TheTENS mini Microprocessors offer six types of

automatic programme for shoulder pain, back/neck pain, aching

joints, Rheumatic pain, migraines headaches, sports injuries,

period pain. ln fact all over body treatment. Will not interfere with

existing medication. Not suitable for anyone with a heart

pacemaker. Batteries supplied. £19.95 Ref TEN327 Spare pack of

electrodes £5.99. Ref TEN327X

Dummy CCTV cameras These motorised cameras will work either on

2 AA batteries or with a standard DC adapter (not supplied) They have

a built in movement detector that will activate the camera if movement

is detected causing the camera to ‘pan’ Good deterrent. Camera

measures 20cm high, supplied with rawl plugs and fixing screws.

Camera also has a flashing red LED built in. £9.95. Ref CAMERAB

Colour CCTV Camera measures 60x45mm and has a built in light

level detector and 12 IR LEDs .2 lux 12 IR LEDs 12V d.c. Bracket

Easy connect leads £69. Ref EE15

BULL ELECTRICAL

UNIT D, HENFIELD BUSINESS PARK,

HENFIELD, SUSSEX BN5 9SL

TERMS: CASH, PO OR CHEQUE WITH ORDER

PLUS £5.50 P&P (UK) PLUS VAT.

24 HOUR SERVICE £7.50 (UK) PLUS VAT.

OVERSEAS ORDERS AT COST PLUS £3.50

A high quality external colour CCTV camera with built in Infra-red

LEDs measuring 60x60x60mm Easy connect leads colour

Waterproof PAL 1/4’ CCD 542x588 pixels 420 lines .05 lux 3.6mm

F2 78 deg lens 12V d.c. 400mA Built in light level sensor. £99. Ref

EE13

(ACCESS/VISA/SWITCH ACCEPTED)

’phone: 01273 491490 Fax 491813

Sales@bullnet.co.uk

SHOP ONLINE

WWW.BULLNET.CO.UK

ISSN 0262 3617

PROJECTS . . . THEORY . . . NEWS . . .

COMMENTS . . . POPULAR FEATURES . . .

VOL. 32. No. 3 MARCH 2003

Cover illustration by jgr22

www.epemag.wimborne.co.uk

EPE Online:

www.epemag.com

Projects and Circuits

WIND-UP TORCH MK II

by Thomas Scarborough

A new twist for providing light without a battery!

DRIVER ALERT

by Josh Arkell, Adam Wolley and Max Horsey

A thinking time reaction tester – award winning design in the

Young

Electronic Designer Awards 2002

200kHz FUNCTION GENERATOR

by Andy Flind

Versatile test gear that generates sine, square and triangle-wave outputs,

with controllable amplitude

INGENUITY UNLIMITED

hosted by Alan Winstanley

Random Dooorbell; Headphone Amplifier; Low Battery Indicator;

Pico Prize Winners

BACK TO BASICS – Part 2. Metal Detector; Simple Timer

by Bart Trepak. Illustrating how transistors can create useful designs

172

184

197

217

220

Series and Features

TECHNO TALK

by Andy Emmerson

Bendy Batteries for Flexible Power

CIRCUIT SURGERY

by Alan Winstanley and Ian Bell

Surface Mount Reworking; Bleeder Resistors; More on Motors

NET WORK – THE INTERNET PAGE

surfed by Alan Winstanley

Buy Now on eBay

LCR PASSIVE COMPONENT ANALYSER

by Andy Flind

An appreciative examination of Peak’s new handheld analyser for

measuring resistors, capacitors and inductors

PRACTICALLY SPEAKING

by Robert Penfold

Constructor’s guide to mounting loudspeakers, resonators and meters

in the front panels of enclosures

NEW TECHNOLOGY UPDATE

by Ian Poole

Printed plastic transistors and organic l.e.d.s could provide truly

flexible display screens

176

182

205

206

210

215

Regulars and Services

EDITORIAL

NEWS –

Barry Fox highlights technology’s leading edge

Plus everyday news from the world of electronics

READOUT

John Becker addresses general points arising

BACK ISSUES

Did you miss these? Many now on CD-ROM!

SHOPTALK

with David Barrington

The

essential

guide to component buying for

EPE

projects

CD-ROMS FOR ELECTRONICS

A wide range of CD-ROMs for hobbyists, students and engineers

DIRECT BOOK SERVICE

A wide range of technical books available by mail order, plus more CD-ROMs

PRINTED CIRCUIT BOARD AND SOFTWARE SERVICE

PCBs for

EPE

projects. Plus

EPE

project software

ELECTRONICS MANUALS

Essential reference works for hobbyists, students and service engineers

ADVERTISERS INDEX

171

178

191

194

219

212

224

227

228

drawings, photographs and articles published in

EVERYDAY PRACTICAL ELECTRONICS is fully

protected, and reproduction or imitations in whole or

in part are expressly forbidden.

232

Our April 2003 issue will be published on Thursday,

13 March 2003. See page 163 for details

Readers Services

)

Editorial and Advertisement Departments 171

161

Everyday Practical Electronics, March 2003

L T

EE IA EN

FR EC M

P E

S PL

NEXT MONTH

EPE

PIC TUTORIAL V2

Quite simply the best low-cost way to learn about using PIC microcontrollers! Three Special

EPE

Supplements to be published in the April, May and June issues contain the revised edition of the highly-

acclaimed series published in 1998 and which has enabled many thousands of readers to understand and

use PICs in their own electronic designs.

Using the

EPE Toolkit TK3

hardware and software (Oct/Nov ’01) as the demonstration platform, the series

assumes that you have no prior knowledge of PICs and leads you “by the hand”, showing how each of the PIC’s

commands can be used, and encouraging you to experiment with them. At the simplest level you are shown how

to just turn on an l.e.d., but we progress to show how switches can be monitored, sound generated, matrixed

7-segment l.e.d. displays used, liquid crystal alphanumeric displays controlled, and a real-time clock control

program written.

The demonstrations are based around the PIC16F84, the simplest device in the PIC family through which to

learn. In Part Three we also examine some of the simpler differences between this PIC16F8x family device and

the more sophisticated PIC16F62x and PIC16F87x families. We also illustrate some of the more advanced PIC

programming techniques available, such as binary coded decimal conversion, multiplication, division, analogue-

to-digital conversion, and data EEPROM reading and writing for all three families.

By the end of the series you should be well equipped to conceive of a design and to program a PIC so that it will

do what you’ve always wanted to achieve!

EARTH RESISTIVITY LOGGER

Help your local archaeological society to “see

beneath the soil” and discover the hidden mysteries

of our ancestors. This data logging design is based

on the well-established principle of transmitting an

electrical frequency into the soil via simple metal

probes, retrieving it at a distance via two other

probes, and storing it for further analysis.

The data is stored into an on-board non-volatile

serial memory (EEPROM) capable of holding

16384 data samples, representing a survey grid

typically comprised of 128 columns and 128 rows –

a vast amount of survey data!

Stored data can be transferred to a PC-compatible

computer and saved to disk as often as required

without affecting its on-board retention.

FREE Windows-based software allows the survey

data to be analysed in full or in selected blocks, as

intensity-graded colour or monochrome grid

squares, or as graphical signal amplitude

waveforms, with zoom option. The data files are

compatible with Windows Excel graphing and

analysis software.

ATMOSPHERICS MONITOR

Tune in and listen to the sounds of the heavens in

turmoil – Whistles, Pings, Chirps, Chinks, Clinks,

Tweaks, Risers and even the exotic Dawn Chorus, all

created by the electrical activity of lightning when a

storm is in progress, even when it’s on the other side

of the globe!

BACK TO BASICS – two more

simple, easy to build projects

NO ONE DOES IT BETTER

DON'T MISS AN

ISSUE – PLACE YOUR

ORDER NOW!

Demand is bound to be high

APRIL 2003 ISSUE ON SALE THURSDAY, MARCH 13

Everyday Practical Electronics, March 2003

163

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2003_03(2).pdf

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