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Audio, video and Photography

Audio Level Adapter 282Audio Source Enhancer 9Automatic TV Lighting Switch 23Car Radio Booster 150Dynamic Limiter 184Electret Mic Booster 208Electric Guitar Preamp, Mixer and

Line Driver 291Equalising HEXFETs 300From Microphone to Line Input 315Glass Blower 219Guitar Amplifier PSU 35Guitar Pick-up Tone Extender 50Improved Hybrid HeadPhone Amplifier 62Indicator for Dynamic Limiter 229Line Input for Zoom H2 255Load Protection for Audio Amplifiers 87Mini Sixties Plus 237No-CA3080 Guitar Compressor 247Remote-controlled Preamp

with Digital Pot 264Reverse RIAA Adaptor 273Sensitive Audio Power Meter 101Sixties-style 40 W Audio Amplifier 324SRPP Headphone Amplifier 197Stereo Widening 140S-video Converter 114Two TV Sets on a Single Receiver 127Video Switch for Intercom System 307Vocal Adaptor for Bass Guitar Amp 163Voltage Limiter for Guitar Amplifiers 345Wireless S/PDIF Connection 175

Computers and Internet

3-Pin Fan in 4-Pin Socket 164‘Always on’ for PCs 176Cheap Serial Port for the Mac 10Computer Digital Audio Interface 220Control Interface via PC Keyboard 36Fan Speed Controller 24MicroSD Card Connectors 198Network RS232 52

Network Wiring Tester 187One Wire RS232 Half Duplex 65PC Power Saver 74Power Saver 209Powering a Second Hard Drive 90Pseudo Fan 102Remote Control for Network Devices 116Repeatable COM Port Enumeration 230Start-up Aid for PCs 239TurboGrafx-16 (PC-Engine)

RGB Amplifier 129Upgrade your USB Hub 249USB Switch 142VGA Background Lighting 152

Hobby and Modelling

Acoustic Distress Beacon 222Annoy-a-Tron 76Arc Welding Effect for Model

Railway Layouts 308Arduino Nano Robot Controller 335Astrolamp 317Bat 210Braitenberg Robot 25Breadboard/Perfboard Combo 37Cheap Bicycle Alarm 143Clock Pulse Generator 177Daggerboard Position Detector 165DIY Front Panels 153Flashing Lights for Planes

and Helicopters 231Flat Battery Indicator 326Front Panel Design Program 188Front Panels the Mouse Mat Way 249Full-colour Night-flight Illumination 66Going for Gold 11Green/Red Multiflasher 256Impact Clock 92Jogging Timer 240LED Remote Control for RC Models 392Lighting Up Model Aircraft 104Lights Control for Model Cars 283LiPo Monitor 53Mini Dice 384

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Modeller’s Clock 266Morse Clock 343Musical Horn for ATBs 274Play ‘Simon’ 199RGB Solar Lamp 346Roadwork Traffic Signals for Modellers 354Servo Driver 118Shunting Lights for DCC Locomotives 293Speed Control 131Tachometer Pulse Divider 360Timer for Very Long Periods 379UV Light Box 389Whistler: Electronic Trainer/Coach 301Wire Loop Game 367Zero-IC 24-LED Pulsed Cycle Light 374

Home and Garden

12 V AC Dimmer 1212-volt Cellar Drain Pump 2502/4/6-hour Timer 376Analogue Electronic Key 257Animal-friendly Mousetrap 285Automatic AC Power Switch

for the Holiday Home 380Automatic Bicycle Light 27Automatic Curtain Opener 54Bathroom Fan Controller 39Binary Clock 275Chill Out Loud 68Daylight Switch 77Dimmable Aquarium Light 93Economy Timer 104Indoor / Outdoor Thermometer 410Intelligent AC Power Bar 294Light Sensor with Twilight Detection 402Long Duration Timer using ATtiny2313 144Luxeon Logic – Brightness Control

for LED Torches 166Outdoor Lighting Controller 309Phase Coupler for PLC or X10 Network 302Phone Ring Repeater 132Power On Indicator 119Power-up/down Sequencer 154Protecting PE Water Pipes against Frost 385Pulse Clock Driver with

DCF Synchronisation 200Pump Controller with

Liquid Level Detection 390Remote Washing Machine Alert 179Small Lamp – Huge Bill 393

Snail Mail Detector 212Solar-driven Moisture Detector 189Switching Delay 222Tandem Doorbell 404Temperature Logger for the Fridge 318Timer for Battery-Powered Tools 327Touch-controlled Dimmer 337Twilight Switch 395Two-button Digital Lock 232Underfloor Heating Controller 268Universal Timer with Zero

Standby Current 347Water Alarm 355Water Level Detector 397Waterproof Bathroom Switch 361WAV Doorbell 399Wireless Alarm Transmitter

and Receiver 368Wireless Baby Monitor 241

Microcontrollers

ADC for the PIC16F84A 362An E-Blocks IR RC5 Decoder 40Arduino Shields 191ATM18 and Three 1-Wire

Thermometers 213ATM18-DIP 134ATM18 Youth Repellent 242Breakout Board for PIC10F2xx

(SOT23-6) 348Crystal Pulling 94Driver Free USB 13Easy LEGO Robotics Set Up 29Extra Port Connections for the R8C/13 223Getting Started with your

Free LPCXpresso Board 258I2C Display 70I2C User Interface 286LED Chase 251Make your R8C/13 Speak CAN 295MCS08DZ60 Evaluation Board 121MHz Oscillator using an ATtiny15 270Mini Experimental Board for ATtiny45 303PIC RJ-45 Cable Tester 156PIC/C or VHDL/FPGA for RFM12 TX/RX 233Port Expander 80Quartz Clock Timebase 145Reanimating Probe for AVR �C 276RS232 Level Shifter with Isolation 319‘SCAP’ AVR Programmer 328

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Sceptre: Driving a Touch ScreenArduino-style 338

Six-digit Display with SPI Port 56Support Board for Arduino Nano 356Time Transporter 310Tiny Pulser 181Tiny Timer 203USB Radio Terminal 106USB/TTL Serial Cable:

Extension & Supplement 168Voltage Booster using Arduino 371

Miscellaneous Electronicsand Design Ideas

3D LED Pyramid 20470 A Solid-state Starter Relay 3818-channel DTMF Link: Decoder 2528-channel DTMF Link: Encoder 244A Few DC Solid-state Relays 400Analogue LED Chaser Light 398Automatic Rear Bicycle Light 260Backlight Delay 15Breadboard as Hotplate 234Car Alarm Sound Booster 271Chaos Generator 387Cheapest Ever Motion Sensor 376Cut-rate Motorbike Alarm 109Debouncer for 12 V Contacts 394Digital Thumbwheel Switch 277DIY SMD Adapter 288DMX Transmitter 73Dog Whistle for Ronja 391Economical On/Off Power Switch 297Emergency Stop 304Experimental Hall Sensor 396Fast Reliable Vias 311Floating Message 42Four-component Missing-pulse Detector 30Freezer Trick 58Frequency Divider with 50% Duty Cycle 96Hassle-free Placement of

SMD Components 81Identifying Stepper Motors 320LED Bicycle Light Revisited 329LED Bicycle Lights 107LED Multi-Flasher 403Low-cost Wire Stripper 405Maglev Demo 406Make Your Own Solder Mask Overlays 408Micropower Crystal Oscillator 122

Mini Flasher 411Momentary Action with a

Wireless Switch 146NPN Relaxation Oscillators 412OBD Vehicle Protection 413PR4401 1-Watt LED Driver 135Programmable Nokia RTTTL Player 157Pulse Receiver 340Return of the Elex Prototyping Board 414RGB Synchronizing Fireflies 349Ring Oscillator 415Scope Text 357Simple Wireless and Wired

Emergency Stop System 214Simple Wire Link Bender 180Six-way Switch 372Slow Glow 169Stress-o-Meter 192Temperature Stabilisation 417TL431 Multivibrator 225Universal 3-wire Flasher Unit

for Scooters 416Zapper for Electrotherapy 364

Power Supplies, Batteriesand Chargers

Adjustable Low-DropoutVoltage Regulator 278

Adjustable Low-voltage Power Supply 254Bench PSU for PC 170Constant Current Source

Adjustable down to 0 mA 289Current Source for Grounded Load 299DC/DC Converter using LT1376 245Deep Discharge Protection

for 12 V Batteries 159Desulphater for Car Batteries 16Discrete Low-drop Regulator 182Doubling Up with the PR4401/02 58Floating Supply for Panel Meters 261High Voltage Generator 305L200 Charger Circuit 194Lead Acid Battery Protector 31LEDify It! Mobile 3-watt LED Lamp 43Lithium Battery Charger using BQ24103 82LM2931-5.0 is a Random Noise

Generator too 312Low-drop Series Regulator

using a TL431 148

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Power Controller for ElectricConvector Heaters 331

Power Supply withHigh Voltage Isolation 341

Protection for Voltage Regulators 377Regulator for Three-Phase Generator 322Router UPS 350Sailor’s Battery Meter 215Simple LED Constant Current Source 272Single Lithium Cell Charger 97Single-cell Power Supply 110Solar Cell Battery Charger/Monitor 136SSR 2.0 – OptoMOS

semiconductor relays 123The LM3410 LED Driver 206Universal PWM Driver 226USB Charger using Pedal Power 365Virtual 9 V Battery 235

RF (radio)

0–18 MHz Receiver 18AM Receiver with Quadrature Mixer 32Emitter-Follower Audion 111FM Audio Transmitter 46Minimalist Dip Meter 124Notch Filters for

Intermediate Frequencies 172Pre-emphasis for FM Transmitter 59Reradiating GPS Antenna 160Simple RF Noise Source 83Variable Crystal Filter 139Vest Pocket VHF FM Test Generator 99Wideband Receiver

for Spark Transmissions 148

Test and Measurement

AC Power Indicator 174Battery Charge Monitor 313Belgian Earth Fault Detector 323Crystal Tester 139Digital Sweep and Sinewave Generator 20Frequency and Time Reference

with ATtiny2313 84

Ground-free DVM Module Supplyfrom 5 V 207

Ignition Timer 218IR Tester 299Laser Level Detector 352LED Tester 228Measurement Filter for Class D 332Measuring Milliohms with a Multimeter 34MicroMinimal Thermometer 195Mobile Phone TX Demo 254Oil Temperature Gauge

for 125 cc Scooter 342Petrol/Diesel Level Sensor 236Powerline Voltmeter 183Preamplifier for RF Sweep Generator 61Quartz Crystal Tester 100Rapid Test and Measurement 307Servo Scales 48Simple IR Remote Control Tester 378Simple Low Cost Square Wave

Generator & Tester 359Simple Temperature Measurement

and Control 112SMD transistor Tester 125Smoggy – use your Walkman

to detect electrosmog 149Sweep your Function Generator 246Tester for Inductive Sensors 162Thermometer with Four-Digit

LED Display 262Triangular Wave Oscillator

with Sine Wave Converter 366Universal IR Remote Control Tester 272Universal Tester for 3-pin Devices 373USB Tilt Sensor 280Variable Voltage Injector 388Voltage Difference Magnifier 363Voltage Monitor 290Zener Diode Tester 382

Appendix

A Electrical Safety 419