Elektor 09.2009.pdf

www.elektor.com September 2009 AUS$ 13.90 - NZ$ 16.90 - SAR 99.95 £ 4.65

electronics & microcontrollers

OLED ‘scope

OBD2 Analyser

Battery Power

electric vehicles come of age

Power Charger for ElektorWheelie

ATM18 Mini Chess Computer

GPS Datalogger

R39

on R32C experimenter’s board

with ARM Cortex-M3 controller

The Road to

The Most Popular 8-bit Microcontrollers!

The Best Customer Support.

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customer support and the industry’s shortest leadtime – 3-4 weeks!

24/7 Support

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With over 400 diferent variants, there is an 8-bit PIC® microcontroller for every

design. Microchip’s 8-bit family now includes microcontrollers with the smallest

form-factor, industry-irst peripherals and up to 16 MIPS performance.

t*ODSFBTFE Field Application

Engineer support team

Pin- and code-compatibility ensure easy migration across the 8-bit family and up

to 16-bit designs and Microchip’s MPLAB® IDE is absolutely free, and supports ALL

of Microchip’s 8-, 16-, and 32-bit microcontrollers – from 6 to 100 pins!

With over 7 Billion PIC microcontrollers shipped worldwide and increased

investment in product development and customer support, you can count on

Microchip to be here for you - especially through the tough times.

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t*ODSFBTFE Customer Training

Support through Regional

Training Centers (RTCs)

Comprehensive support starts with the Microchip Advanced Part Selector (MAPS)

and extends throughout the design cycle with free or low-cost development

tools, online and regional training and 24/7 technical support.

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SOFTWARE AND HARDWARE SOLUTIONS FOR THE EMBEDDED WORLD

w w w . m i k r o e . c o m

electronics & microcontrollers

Electromobile

This month’s focus is on automotive

and I believe the subject is covered

from a number of interesting angles.

The main project, for example, is

our new pocket-size OBD2 Analyser

with an extensive range of features.

Fully DIY to Elektor standards, the

instrument should be compatible

with all modern cars having OBD

connectivity. The built-in analyser will

faithfully read and display engine

data and any error codes you or

Edd the mechanic will want to clear

by matching repair work on the

vehicle. A graphic display ensures

a clear readout with plain-language

descriptions.

Those of you keen to use Google

Earth, a regular USB memory stick

and your PC to trace the actual route

you have followed by car, bike or on

foot will ind the GPS Datalogger on

page 30 an awesome project, if only

because it’s modular and the software

is ever so easy to adapt to personal

requirements. RU ready boots (or

wheels)… start logging!

The article on technological develop-

ments in electric cars concentrates on

energy sources available (and desir-

able) to power these vehicles. Which

sources are likely to be used by future

generations and what are all these

car and battery manufacturers doing

in their labs and on their test tracks?

Our ElektorWheelie self-balancing

electro scooter is covered in two

articles, one on the mechanical

assembly of the kit parts and your

careful irst attempts to ride the

vehicle, and another on a symmetri-

cal battery charger developed as a

premium alternative to the charger

normally supplied with the kit.

Of course, it’s not all vehicles and

batteries in this issue. With all

‘wheels’ safely parked or connected

to a charger, why not play a game

of chess against our ATM18 Mini

Chess Computer, or explore how an

R32C microcontroller drives an OLED

display.

Finally, I’m happy to announce a new

four-page section in Elektor called

E-Labs Inside . These pages are irmly

positioned in the centre of the maga-

zine, just like the real Elektor Lab is

at the centre of our publications and

many of our products. E-Labs Inside

reports on what our lab staff have

run into during the month — you can

expect to read about techie problems

and workarounds, equipment to drool

on, gizmos, burnt PCBs, techno-gos-

sip, tips and tools of the trade.

Happy reading!

16 TheRoadtoBatteryPower

Development of electric vehicles continues apace and

the enormous potential is clear. The key to the

success of electric vehicles lies, contrary

to early expectations, in lithium-ion

cells rather than in fuel cells.

This article has an overview

of current and future

technologies.

22 OBDAnalyserNG

The compact OBD2 Analyser in the June 2007 issue was an enormous success.

Now, it’s enhanced with a graphical display, Cortex M3 processor and an Open

Source user interface, the next

generation (NG) of Elektor’s

standalone analyser sets new

standards for a DIY OBD2

project.

Jan Buiting

Editor

CONTENTS

Volume 35

September 2009

no. 393

30 GPSDatalogger

projects

22 OBD Analyser NG

30 GPS Datalogger

36 R32C Application Board

This project allows you to log the path of a bike or car trip and load

the data into GoogleEarth™ using a common USB memory stick. The

hardware is based on the famous Parallax Basic Stamp and open for

further development.

48 Battery Monitor

54 ATM18

Mini Chess Computer

58 Getting Started with Em-

bedded C (part 3, inal)

64 ElektorWheelie

construction and driving

68 Power Charger

for ElektorWheelie

72 Design Tips: Quantum Die

technology

16 The Road to Battery Power

48 BatteryMonitor

e-labs inside

43 A dirt cheap mobile phone

44 Double-sided soldering

in relow oven!

46 “I’ll take it”

Yokogawa 2054 oscilloscope

This circuit can be used in any application where batteries are

charged and discharged. The circuit uses an LPC2103 microcontroller

connected to a 22-bit A/D converter to measure charge and discharge

currents, battery voltage, charge status (or available capacity) and the

instantaneous power being supplied to or drawn from the battery.

info & market

6 Colophon

8 Mailbox

10 News & New Products

74 Elektor PCB Service — FAQ

80 Elektor SHOP

84 Coming Attractions

infotainment

76 Hexadoku

77 Retronics:

Leak coaxial trough-line

VHF FM stereo tuner (1962)

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