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Magazine July/August 2009

Magazine July/August 2009

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60 Elektor Credits

Content

ElektorWheelie

The electronics behind a rather special kind of vehicle

Hexamurai July/August 2009

Who'll be the one to beat it?

Wireless Baby Monitor

Network RS232

Simple Wire Link Bender

Single-cell Power Supply

Economy Timer

Full-colour Night-flight Illumination

Smoggy, use your Walkman to detect electrosmog

Solar-driven Moisture Detector

FM Audio Transmitter

Servo Driver

Chill Out Loud

Dimmable Aquarium Light with Simulated Sunrise and Sunset

Audio Source Enhancer

Doubling Up with the PR4401/02

Digital Sweep and Sinewave Generator with direct frequency entry

Guitar Amplifier PSU

Acoustic Distress Beacon

Measuring Milliohms with a Multimeter

Snail Mail Detector

Improved Hybrid HeadPhone Amplifier

Guitar Pick-up Tone Extender

Lithium Battery Charger using BQ24103

12 V AC Dimmer

Simple Temperature Measurement and Control

USB Switch

I2C Display

Pre-emphasis for FM Transmitter

Sensitive Audio Power Meter

Bathroom Fan Controller

Backlight Delay

Power On Indicator

Stereo Widening

SMD Transistor Tester

TL431 Multivibrator

S-video Converter

SSR 2.0, OptoMOS semiconductor relays

Speed Control

Four-component Missing-pulse Detector

Hassle-free Placement of SMD Components

Daylight Switch

Control Interface via PC Keyboard

PR4401 1-Watt LED Driver

Braitenberg Robot

Automatic Bicycle Light

Programmable Nokia RTTTL Player

Switching Delay

Six-digit Display with SPI Port

LiPo Monitor

Low-drop Series Regulator using a TL431

VGA Background Lighting

Wireless S/PDIF Connection

One Wire RS-232 Half Duplex

Load Protection for Audio Amplifiers

Impact Clock

Lead Acid Battery Protector

Automatic Curtain Opener

Stress-o-Meter

Powering a Second Hard Drive

Two-button Digital Lock

Long Duration Timer using ATtiny2313

Single Lithium Cell Charger

Frequency Divider with 50% Duty Cycle

PIC Detects Rotation Direction

Vocal Adaptor for Bass Guitar Amp

TurboGrafx-16 (PC-Engine) RGB Amplifier

Fan Speed Controller

Power-up/down Sequencer

Floating Message

Micropower Crystal Oscillator

Automatic TV Lighting Switch

Phone Ring Repeater

Pulse Clock Driver with DCF Synchronisation

Two TV Sets on a Single Receiver

Tester for Inductive Sensors

USB Radio Terminal

Going for Gold

Cut-rate Motorbike Alarm

Remote Control for Network Devices

Breadboard/Perfboard Combo

Momentary Action with a Wireless Switch

Servo Scales

Driver Free USB

Lighting Up Model Aircraft

LED Bicycle Lights

Remote Washing Machine Alert

Freezer Trick

LEDify It!, mobile 3-watt LED Lamp

Annoy-a-Tron

Simple Wireless and Wired Emergency Stop System

Desulphater for Car Batteries

PC Power Saver

An E-Blocks IR RC5 Decoder

Quartz Crystal Tester

Luxeon Logic, brightness control for LED torches

Preamplifier for RF Sweep Generator

Cheap Serial Port for the Mac

0–18 MHz Receiver

Start-up Aid for PCs

Port Expander

Slow Glow

SRPP Headphone Amplifier

Easy LEGO Robotics Set Up

Pseudo Fan

DMX Transmitter

Frequency and Time Reference with ATtiny2313

Price: USD 11.30

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