at a glance
Audio
10W Mini Audio Amplifier Speech Recorder Digital Volume Control FET Audio Mixer Sound Level Meter Amplifier of acoustic frequencies with preamplifier Motorola Hi-Fi power amplifier 2N3055 Power Amplifier 5,000W ultra-light, high-power amplifier, without switching-mode power supply Tiny audio amplifier using LM386 Stereo tape head preamplifier using LA3161 20W Bridge Audio Amplifier 20W Audio Amplifier using LM1875 Active Bass & Tremble Controller Three Channel Audio Mixer Infrared cordless Headphone Amplifier 200W Audio Amplifier 5-Band Graphic Equalizer 600W Audio Amplifier Portable Audio Amplifiers Universal Preamplifier Cheap Audio Booster
Automotive
Car Battery Indicator Automotive 12V to +-20V converter (for audio amplifier) Simple but reliable car battery tester Synchronized multi-spark module (SMSM) for Electronic Ignition Devices (EID) Nite Rider Lights
Games and entertainment - Robots
PIC16F84A discolight effect with bass beat control The Millipede 3V LED Chaser 6V Ultra-Bright LED Chaser High Power LED mood Lamp
Motor, light and power control
2500W Phase Control Sound Level Indicator On-Off Temperature Control A power source for simple LED projects Simple DC motor PWM speed control 6 Channel Auto Reverse Sequential Disco Running Lights Automatic Fan Controller Low cost / Automatic Emergency Light 5 Lamp / LED Flash Driver Light Control System High current bipolar stepper motor controller DC servo motor driver 200W Lamp Flasher 555 stepper pulse generator Dark Sensitive Switch Simple Servo Tester
Oscillators and timers
Digital Stopwatch 0-99sec Digital Stopwatch 0-60sec Adjustable High/Low Frequency Sine wave generator Photo Timer Circuit Darkroom Timer v2.0A for PCB Exposure Box 230V Blinking LED Pulse generator
PC related
Casio Cable The 8Way Relay Board LCD2LPT with LIRC Build your own printer cable LCD Display Improved Infrared Receiver with status led 8 Channel software controlled fanbus with PWM An Improved Infrared Receiver with status led (Billy's Plug) A Laboratory Control System for Cold Atom Experiments 8 Channel LPT relay board USB Sound Card with PCM2702 Ethernet Controller
MCU (Microcontrollers)
PlayPIC Ponyprog Circuit for AVR & PIC16F84 Ponyprog Circuit for ATMEL'S AVR ATMEL 89 Series Flash Microcontroller Programmer EPROM adapter for ATMEL 89 Programmer PIC diode tester AquaCont - Aquarium Control Digital Volt and Amp Meter with Temperature Control MCU controlled Bluetooth automation with infrared sensor PCB Exposure Box with Fluorescent Lamps and countdown system 89Sxx Development Board Breadboard header for ATTiny 25/45/85
RF Circuits
4W FM Transmitter CB receiver CB transmitter Transmitter FM 45W with valve FM radio 4W FM Transmitter Nostalgic Crystal Radio AM to FM Converter 60W Linear amplifier AM FM Simultaneous Transmitter Using Digital IC The "UnFETtered Crystal Radio! Simple FM Transmitter
Power
0-30 Vdc Stabilized Power Supply With Current Control 0.002-3 A 13.8V 20A power supply 0-50V 2A Bench power supply 3-30 V/2.5 A Stabilized power supply 500W low cost 12V to 220V inverter TTL Power Supply with "Crowbar" protection Batteries charger & PSU - ideal for digital cameras Pulse Charger for reviving tired Lead Acid batteries NiCd - NiMH Charger 1.2 - 15V/3A adjustable regulated power supply Dual Voltage Power Supply 13.8V/40A Stabilized Power Supply
Robotics - GPS
12-way Input/Output Interface Church bell Controller Open GPS Tracker
Security and other sensors and detectors
iButton electronic lock Water level buzzer Ethernet based Security System
Science related
Mini efficient coil launcher from disposable camera flash Plants Watering Watcher 2 Electronic Stethoscope 2
Telephone related
Phone line indicator Phone Busy Indicator Telephone Hold Button The Link Telephone Intercom The Link A2B+1 (the Link Telephone Intercom - DTMF version) The Link 4+0 – Internal Intercom The Original 2 Phone Link Design The Link "P" - Privacy Link! (Telephone Intercom) Two way Simple Very Small Telephone Exchange
Test and measurement
Led display digital Voltmeter Mosfet TESTER Inductance meter adapter Voltage Monitor Logic Probe Logic probe plus Voltmeter + Ammeter LCD panel IR Digital Thermostat for FAN
Miscellaneous
Flyback Transformer Driver Simple optical switch Audio VU meter 9 leds IR Remote Volume Controller Solid state relay switch Dual Relay Driver Board 4 channel infrared remote relays The experimenter's pot - Digital Potentiometer MAX6953 Development board Centrifugal fish autofeeder Solar Mailbox project
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