EPE_2007-07.pdf

LEAD-ACID

ZAPPER

Get extra life from your tired

old lead-acid battery

MINICAL 5V METER CALIBRATION STANDARD

Plus a frequency reference/crystal checker

VIDEO

READING AID

Enlarges text and

displays it on a TV

or monitor

1 USING MPLAB – 2

1 MECHATRONICS – Controlling Motors

$6.95 US $8.99 CAN

JULY 2007 PRINTED IN THE UK

BATTERY

(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 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.

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

workmanship used by readers, EPE Onlin 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.

HB7 Stirling Engine

Base measurements: 128 mm x 108 mm x 170 mm, 1 kg

Base plate: beech - Working rpm: 2000 rpm/min. (the

engine has a aluminium good cooling Cylinder)

Bearing application: 10 high-class ball-bearings

Material: screw, side parts all stainless steel

Cylinder brass, Rest aluminium and stainless steel.

Available as a kit £80.75 or built £84.99

www.mamodspares.co.uk

STEAM ENGINE KIT

Everything in the kit enables you to build a fully functional

model steam engine. The main material is brass and the

finished machine demonstrates the principle of oscillation.

The boiler, uses solid fuel tablets, and is quite safe. All

critical parts (boiler, end caps, safety vent etc.) are ready

finished to ensure success. The very detailed instruction

booklet (25 pages) makes completion of this project pos-

sible in a step by step manner. Among the techniques

experienced are silver soldering, folding, drilling, fitting

and testing. £29.70 ref STEAMKIT Silver solder/flux pack

£3.50 ref SSK

Solar Panels

We stock a range of solar photovoltaic panels. These are

polycrystalline panels made from wafers of silicon lami-

nated between an impact-resistant transparent cover and

an EVA rear mounting plate. They are constructed with a

lightweight anodised aluminium frame which is predrilled

for linking to other frames/roof mounting structure, and

contain waterproof electrical terminal box on the rear. 5

watt panel £29 ref 5wnav 20 watt panel £99 ref 20wnav

60 watt panel £249 ref 60wnav. Suitable regulator for up

to 60 watt panel £20 ref REGNAV

www.mamodspares.co.uk

HB9 Stirling engine

Base measurements: 156 mm x 108 mm x 130 mm, 0,6

Kg Base plate: beech Working rpm: approx. 2,000 min

Bearing application: 6 high-class ball-bearings

Material of the engine: brass, aluminium, stainless steel

running time: 30-45 min.

Available as a kit £97.75 or built £101.99

www.mamodspares.co.uk

HB14 Stirling Engine

Base measurements: 156 mm x 108 mm x 150 mm, 1 kg

Base plate: beech Working rpm: 2000 - 2500 rpm/min, .

Incl. drive-pulley for external drives Bearing application:

10 high-class ball-bearings Material: screw, side parts total

stainless steelCylinder brass Rest aluminium, stainless

steel Available as a kit £140.25 or built £144.50

www.mamodspares.co.uk

Solar evacuated tube panels

(20 tube shown) These top-of-the-range solar panel

heat collectors are suitable for heating domestic hot

water, swimming pools etc - even in the winter! One unit

is adequate for an average household (3-4people), and

it is modular, so you can add more if required. A single

panel is sufficient for a 200 litre cylinder, but you can fit

2 or more for high water usage, or for heating swimming

pools or underfloor heating. Some types of renewable

energy are only available in certain locations, however

free solar heating is potentially available to almost every

house in the UK! Every house should have one -really!

And with an overall efficiency of almost 80%, they are

much more efficient than electric photovoltaic solar pan-

els (efficiency of 7-15%). Available in 10, 20 and 30 tube

versions. 10 tube £199, 20 tube £369, 30 tube £549.

Roof mounting kits (10/20 tubes) £12.50, 30 tube

mounting kit £15

HB10 Stirling Engine

Base measurements: 156 mm x 108 mm x 130 mm, 0,6

Kg Base plate: beech Working rpm: approx. 2,000 rpm

Bearing application: 6 high-class ball-bearings

Material of the engine: brass, aluminium, stainless steel

running time: 30-45 min

Available as a kit £97.75 or built £101.99

www.mamodspares.co.uk

HB15 Stirling Engine

Base measurements: 128 mm x 108 mm x 170 mm, 0,75

kg Base plate: beech Working rpm: 2000 rpm/min. (the

engine has a aluminium good cooling Cylinder)

Bearing application: 6 high-class ball-bearings

Material: screw, side parts total stainless steel

Cylinder brass Rest aluminium, stainless steel

Available as a kit £97.75 or built £102

www.mamodspares.co.uk

BENCH PSU 0-15V 0-2a Output

and voltage are both smooth

and can be regulated according

to work, Input 230V, 21/2-num-

ber LCD display for voltage and

current, Robust PC-grey hous-

ing Size 13x15x21cm, Weight

3,2kg £48 REF trans2

HB11 Stirling Engine

Base measurements: 156 mm x 108 mm x 130 mm, 0,7

Kg Base plate: beech

Working rpm: 2000 - 2500 rpm/min,run Bearing applica-

tion: 4 high-class ball-bearings Material: screw, side parts

total stainless steel Cylinder brass Rest aluminium, stain-

less steel.

Available as a kit £97.75 or built £101.99

www.mamodspares.co.uk

HB16 Stirling Engine

Base measurements: 128 mm x 108 mm x 170 mm, 1 kg

Base plate: beech Working rpm: 2000 rpm/min. (the

engine has a aluminium good cooling Cylinder)

Bearing application: 10 high-class ball-bearings

Material: screw, side parts total stainless steel

Cylinder brass Rest aluminium, stainless steel.

Available as a kit £140.25 or built £144.50

NEW ELECTRONIC CONSTRUCTION KITS

This 30 in 1 electronic kit includes an introduction to elec-

trical and electronic technology. It provides conponents

that can be used to make a variety of experiments includ-

ing Timers and Burglar Alarms. Requires: 3 x AA batter-

ies. £15.00 ref BET1803

AM/FM Radio This kit enables you to learn about elec-

tronics and also put this knowledge into practice so you

can see and hear the effects. Includes manual with

explanations about the components and the electronic

principles. Req’s: 3 x AA batts. £13 ref BET1801

This 40 in 1 electronic kit includes an introduction to

electrical and electronic technology. It provides conpo-

nents that can be used in making basic digital logic cir-

cuits, then progresses to using Integrated circuits to

make and test a variety of digital circuits, including Flip

Flops and Counters. Req’s: 4 x AA batteries. £17 ref

BET1804

The 75 in 1 electronic kit includes an nintroduction to

electrical and electronic technology. It provides conpo-

nents that can be used to make and test a wide variety of

experiments including Water Sensors, Logic Circuits and

Oscillators. The kit then progresses to the use of an inter-

grated circuit to produce digital voice and sound record-

ing experiments such as Morning Call and Burglar Alarm.

Requires: 3 x AA batteries. £20 ref BET1806

www.slips.co.uk

HB12 Stirling Engine

Base measurements: 156 mm x 108 mm x 130 mm, 1 Kg

Base plate: beech Working rpm: 2000 - 2500

rpm/min,Bearing application: 6 high-class ball-bearings

Material: screw, side parts total stainless steel

Cylinder brass Rest aluminium, stainless steel.

Available as a kit £136 or built £140.25

www.mamodspares.co.uk

2kW WIND TURBINE KIT

The 2kW wind turbine is sup-

plied as the following kit: turbine

generator 48v three taper/

twisted fibreglass blades & hub

8m tower (four x 2m sections)

guylines / anchors / tensioners /

clamps foundation steel rectifier

2kW inverter heavy-duty pivot

tower. £1,499

HB13 Stirling Engine

Base measurements: 156 mm x 108 mm x 150 mm, 0,75

kg Base plate: beech Working rpm: 2000 - 2500 rpm/min,

Bearing application: 6 high-class ball-bearings Material:

screw, side parts total stainless steel Cylinder brass

Available as a kit £97.75 or built £101.99

BULL GROUP LTD

UNIT D HENFIELD BUSINESS PARK

HENFIELD SUSSEX BN5 9SL

TERMS: C/ CARDS, CASH, PO, CHEQUE OR

ONLINE ORDERING. PRICES PLUS VAT

UK DELIVERY £5.50

TEL 0870 7707520 FAX 01273 491813

sales@bullnet.co.uk

ISSN 0262 3617

PROJECTS . . . THEORY . . .

NEWS . . . COMMENT . . .

POPULAR FEATURES . . .

INCORPORATING ELECTRONICS TODAY INTERNATIONAL

VOL. 36. No. 7 JULY 2007

www.epemag.co.uk

EPEOnline: www.epemag.com

Projects and Circuits

LEAD-ACID BATTERY ZAPPER by Jim Rowe

Extend the working life of liquid-electrolyte lead-acid batteries

VIDEO READING AID by Jim Rowe

Displays enlarged text on a TV or video monitor

MINICAL 5V METER CALIBRATION STANDARD by Barry Hubble

How accurate is your digital multimeter? Plus a frequency reference

INGENUITY UNLIMITED – Sharing your ideas with others

Micropower Call Monitor, 10V to 15V Battery Voltmeter

DIGI-FLASH SLAVE by Terry de Vaux-Balbirnie

Professional possibilities for your digital camera!

Series and Features

TECHNO TALK by Mark Nelson

Every Little Helps?

PIC N’ MIX by Mike Hibbett

All about PIC special features

USING MPLAB – PART 2 by Mike Hibbett

Initial Stages of Program Writing

CIRCUIT SURGERY by Ian Bell

Linear Voltage Regulators and Capacitors – Part One

THE POWER OF MECHATRONICS – PART 2 by Darren Wenn

Controlling Motors

PRACTICALLY SPEAKING by Robert Penfold

Semiconductor identification

NET WORK – THE INTERNET PAGE surfed by Alan Winstanley

Impressive service, Blog your log today

Regulars and Services

EDITORIAL

NEWS – Barry Fox highlights technology’s leading edge

Plus everyday news from the world of electronics

CD-ROMS FOR ELECTRONICS

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

SUBSCRI BE TO EPE and save money

PIC PROJECTS A plethora of PIC projects on CD-ROM

PIC RESOURCES CD-ROM

EPEPIC Tutorial V2, plus PIC Toolkit Mk3 and a selections of PIC-related articles

BACK ISSUES Did you miss these?

ELECTRONICS MANUALS

The Modern Electronics Manualand Electronics Service Manualon CD-ROM

ELECTRONICS TEACH-IN

A broad-based introduction to electronics plus a Free CD-ROM

READOUT John Becker addresses general points arising

DIRECT BOOK SERVICE

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

EPE PCB SERVICE

drawings, photographs and articles published in

EVERYDAY PRACTICAL ELECTRONICS is fully

protected, and reproduction or imitations in whole or

in part are expressly forbidden.

PCBs for EPEprojects

ADVERTISERS’ INDEX

Our August 2007 issue will be published on Thursday,

12 July 2007,see page 80 for details.

Readers’Services • Editorial and Advertisement Departments 7

Everyday Practical Electronics, July 2007

Projects and Circuits

Quasar Electronics Limited

PO Box 6935, Bishops Stortford

CM23 4WP, United Kingdom

Tel: 0870 246 1826

Fax: 0870 460 1045

E-mail: sales@quasarelectronics.com

Web: www.QuasarElectronics.com

All prices INCLUDE 17.5% VAT.

Postage & Packing Options (Up to 2Kg gross weight): UK Standard 3-7

Day Delivery - £3.95; UK Mainland Next Day Delivery - £8.95; Europe (EU)

- £6.95; Rest of World - £9.95 (up to 0.5Kg).

!Order online for reduced price UK Postage!

Payment: We accept all major credit/debit cards. Make cheques/PO’s

payable to Quasar Electronics.

Call now for our FREE CATALOGUE with details of over 300 kits,

projects, modules and publications. Discounts for bulk quantities.

Credit Card

Sales

Get Plugged In!

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 (PSU010) £19.95

Leads: Parallel (LDC136) £4.95 / Serial

(LDC441) £4.95 / USB (LDC644) £2.95

ABC Maxi AVR Development Board

The ABC Maxi is

ideal for developing

new designs. Open

architecture built

around an ATMEL

AVR AT90S8535

microcontroller. All circuits are embedded

within the package and additional add-on

expansion modules are available to assist

you with project development.

Features

8 Kb of In-System Programmable Flash (1000

write/erase cycles) Ɣ 512 bytes internal SRAM Ɣ

512 bytes EEPROM Ɣ 8 analogue inputs (range 0-

5V) Ɣ 4 Opto-isolated Inputs (I/Os are bi-

directional with internal pull-up resistors) Ɣ Output

buffers can sink 20mA current (direct LED drive) Ɣ

4 x 12A open drain MOSFET outputs Ɣ RS485

network connector Ɣ 2-16 LCD Connector Ɣ

3.5mm Speaker Phone Jack Ɣ 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 com-

piler and in-system programmer.

Order Code ABCMAXISP - £89.95

The ABC Maxi boards only can also be

purchased separately at £69.95 each.

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 - £46.95

Assembled Order Code: AS3140 - £59.95

NEW! USB & Serial Port PIC Programmer

USB/Serial connection.

Header cable for ICSP.

Free Windows XP soft-

ware. See website for PICs

supported. ZIF Socket and

USB lead extra. 18Vdc.

Kit Order Code: 3149KT - £37.95

Assembled Order Code: AS3149 - £49.95

Serial Port Isolated I/O Relay 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. Once programmed,

unit can operate without PC. Includes plastic

case 130x100x30mm. Power: 12Vdc/500mA.

Kit Order Code: 3108KT - £54.95

Assembled Order Code: AS3108 - £64.95

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 XP Software. ZIF

Socket and USB lead not incl.

Assembled Order Code: AS3128 - £44.95

Assembled with ZIF socket Order Code:

AS3128ZIF - £59.95

Infrared RC 12–Channel Relay Board

Control 12 onboard relays with

included infrared remote con-

trol unit. Toggle or momentary.

15m+ range. 112 x 122mm.

Supply: 12Vdc/0.5A

Kit Order Code: 3142KT - £47.95

Assembled Order Code: AS3142 - £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 PSU445 £8.95

‘PICALL’ ISP PIC Programmer

Will program virtually all 8

to 40 pin serial-mode AND

parallel-mode (PIC15C

family) PIC microcontrol-

lers. Free Windows soft-

ware. Blank chip auto detect for super fast

bulk programming. Optional ZIF socket.

Assembled Order Code: AS3117 - £24.95

Assembled with ZIF socket Order Code:

AS3117ZIF - £39.95

Rolling Code 4-Channel UHF Remote

State-of-the-Art. High secu-

rity. 4 channels. Momentary

or latching relay output.

Range up to 40m. Up to 15

Tx’s can be learnt by one Rx

(kit includes one Tx but more

available separately). 4 indicator LED ’s.

Rx: PCB 77x85mm, 12Vdc/6mA (standby).

Two & Ten Channel versions also available.

Kit Order Code: 3180KT - £44.95

Assembled Order Code: AS3180 - £51.95

PC / Standalone Unipolar

Stepper Motor Driver

Drives any 5, 6 or 8-lead

unipolar stepper motor

rated up to 6 Amps max.

Provides speed and direc-

tion control. Operates in stand-alone or PC-

controlled mode. Up to six 3179 driver boards

can be connected to a single parallel port.

Supply: 9Vdc. PCB: 80x50mm.

Kit Order Code: 3179KT - £11.95

Assembled Order Code: AS3179 - £18.95

ATMEL 89xxxx Programmer

Uses serial port and any

standard terminal comms

program. 4 LED’s display

the status. ZIF sockets not

included. Supply: 16Vdc.

Kit Order Code: 3123KT - £24.95

Assembled Order Code: AS3123 - £34.95

Bi-Polar Stepper Motor Driver also avail-

able (Order Code 3158 - details on website)

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

applications for storing/using data. PCB just

38x38mm. Powered by PC. Includes one

DS1820 sensor and four header cables.

Kit Order Code: 3145KT - £18.95

Assembled Order Code: AS3145 - £25.95

Additional DS1820 Sensors - £3.95 each

Introduction to PIC Programming

Go from complete beginner

to burning a PIC and writing

code in no time! Includes 49

page step-by-step PDF

Tutorial Manual, Program-

ming Hardware (with LED

test section), Win 3.11—XP Programming

Software (Program, Read, Verify & Erase),

and 1rewritable PIC16F84A that you can use

with different code (4 detailed examples pro-

vided for you to learn from). PC parallel port.

Kit Order Code: 3081KT - £16.95

Assembled Order Code: AS3081 - £24.95

DC Motor Speed Controller (100V/7.5A)

Control the speed of almost

any common DC motor

rated up to 100V/7.5A.

Pulse width modulation

output for maximum motor

torque at all speeds. Supply: 9-18Vdc. Box

supplied. Dimensions (mm): 60Wx100Lx60H.

Kit Order Code: 3067KT - £13.95

Assembled Order Code: AS3067 - £19.95

Bidirectional DC Motor Driver also avail-

able (Order Code 3166 - details on website)

Most items are available in kit form (KT suffix)

or pre-assembled and ready for use (AS prefix).

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