EE_2012-09.pdf

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[ MICROCONTROLLERS & EMBEDDED • ANALOGUE • AUDIO • DIGITAL • TE S T & MEASUREMENT ]

74874

September 2012 AUS$ 14.90 - NZ$ 17.90 - SAR 105.95 - NOK 102 £ 4.90

embedded

LINUX

www.elektor.com

www.elektor.com

Software Development

✚

Arduino on Course

1-bit Sound Generation ... What?!?

Nunchuk USB Interface

repurposing a video game controller

✚

Model Train Interface

with USB connection and Windows script editor

✚

PICo PROto

Minimalist prototyping tool for PIC16 or 18

Personal Download for I © Elektor

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74874

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74874

Personal Download for I © Elektor

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74874

6

Colophon

Who’s who at Elektor.

8

News & New Products

A monthly roundup of all the latest in

electronics land.

Do try this at home

14

DesignSpark ChipKIT™ Challenge

Winners

Hot ideas turned into cool solutions, and

winning prizes too.

I believe one our irst articles linking DIY elec-

tronics to ‘kiddie’ electronics was the Game-

boy Digital Oscilloscope (GBDSO) from 2000.

Basically, you plugged a module into a Nin-

tendo Gameboy game console and hey presto

there’s a simple portable oscilloscope. Initially

we staged a Dutch-ish auction on the web to

‘test the market’, that is, check what price our

customers were willing to pay for the product.

Eventually the Elektor GBDSO reached sales

volumes in the thousands across a period of

more than ten years. If that GBDSO were an

Olympic athlete, it would be in the company

of Crescendo, EEDTs, Junior Computer, Film-

net Decoder, ATM18, SDR and Pico-C.

Resonating widely across the e-commu-

nity, it is not surprising to see a product

like GBDSO attracting strange questions

from law-abiding readers (mostly from

Germany), like “Where do I get hold of a

known-good Gameboy, with full warranty,

mint condition, at the lowest price?” to

which we replied “Promise your kid(s) the

new Advance model”, or “Dig around in

the sandpit at the local playground”. Like-

wise, Q : “Did you get Nintendo’s lawyers

to approve that module?” A : “Hardly. Nin-

tendo’s techies subscribe to Elektor.”

Twelve years on, I would unhesitatingly rec-

ommend to all you electronics designers

out there to hack, fry, disembowel, blend,

explore, rebuild or repurpose the tons

of kid’s electronics out there. It’s cheap,

often free and in plentiful supply. By rescu-

ing stuff from skips and dumpsters illed

by the throwaway generation, the elec-

tronics inside provides a mental link to the

clever people who designed and build it all.

Reverse engineering is good engineering.

Do it creatively and with respect. Like we did

with the Nunchuk on page 18.

18

Nunchuk USB Interface

Adding USB enables the famous Wii

accessory to be changed into an I 2 C man/

machine interface.

26

Model Train Interface

Give your model railway layout more

intelligence without investing in

intelligent trains!

32

Embedded Linux Made Easy (3)

In this instalment we deal with building

the components of the O/S and even

develop a little C.

40

Motorbike Alarm

This electronic sentry detects if your

bike’s memorized position on the stand is

changed, and sets off an alarm.

43

E-Labs Inside:

- ‘Spoon’ soldering

- USB: current unlimited!?

- GPIO access on Elektor Linux board

- SD Card Correction Script

- Elektorprojects.com 4U2

- Plug-o-(d)rama 2.0

47

Low-cost 60 MHz Sig Gen

PWM, incremental control and an

impressive frequency range — all

squeezed from an LTC6904 and a

PIC16F1823.

48

Electronics for Starters (7)

Adding capacitive feedback to static

transistor circuits enables LEDs to lash

and blink on their own, 4ever & ever.

Happy reading and nunchuking,

Jan Buiting, Managing Editor

4

09-2012 elektor

Personal Download for I © Elektor

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74874

Volume 38

September 2012

no. 429

CONTENTS

54

Arduino on Course (1b)

Here we close off our introduction into

the basics of sound generation using the

Arduino.

18

Nunchuk USB Interface

The Wii games console accessory called Nunchuk has a second controller go-

verning a 3-axis accelerometer, an analogue joystick, and two buttons. All it

takes is a PIC18F2550 to communicate with this man/machine interface using

the I²C protocol and use it for other applications, e.g. in robotics, modelling,

for DMX, etc.

59

Component Tips

Raymond’s Pick of the Month: ams

AS3935 Lightning Sensor. This novel IC

detects thunderstorms up to 25 miles

away.

60

AVR Software Deined Radio (5)

This month we delve into decoding VLF

time signal stations like DCF77, MSF and

TDF162.

26

Model Train Interface

68

BasicCard goes Contactless

Zeitcontrol’s RFID version of the

BasicCard is a great tool to explore

contactless operation of all sorts of

devices.

With this small circuit your model railway will have a few additional features

and more intelligence, without the need to buy intelligent trains and other ex-

pensive model railway equipment. The idea is to write a script which contains

a sequence of instructions (drive forwards or backwards at a particular speed,

stop for a number of seconds, drive to the station, etc.) and to have this script

executed by a circuit speciically designed for this purpose.

70

PICo PROto

Here’s a minimalist prototyping tool for

PIC16 and 18 devices.

74

Model Aircraft Lighting

Use a spare channel on your R/C controller

to switch your model’s navigation,

landing lights, anti-collision beacon and

wing tip strobes.

32

Embedded Linux Made Easy (3)

It is easiest to develop for an embedded Linux system with the help of a con-

ventional Linux system, normally running on a PC. This month we will base our

experiments on version 12.04 of the ‘Ubuntu’ distribution. What do we need to

install such a system? Not a lot: a little free space on the hard disk and, ideally,

a network connection. Linux = GO.

76

Retronics: The ‘Pansanitor’ (1928)

Muscle stimulation from the olden days.

Don’t try this at home. Series Editor: Jan

Buiting

79

Hexadoku

Elektor’s monthly puzzle with an

electronics touch.

68

BasicCard goes Contactless

84

Coming Attractions

Next month in Elektor magazine.

In a new twist, the well-known BasicCard with an open operating system is now

available in an RFID version. As well as the new facilities for contactless opera-

tion, very powerful (and free!) development tools are now available to provide

an easy way to get to grips with this fascinating technology.

elektor 09-2012

5

Personal Download for I © Elektor

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Plik z chomika:

Inne pliki z tego folderu:

EE_2012-09.pdf (9965 KB)
EE_2012-05.pdf (10208 KB)
EE_2012-04.pdf (10912 KB)
EE_2012-03.pdf (13070 KB)
EE_2012-02.pdf (10710 KB)

Inne foldery tego chomika:

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