About Project

I have compiled a number of circuits, projects and ideas for you, which I think will fall into a general “hobby” category.  See Introduction to the Hobby Corner for the philosophy behind creating the Hobby Corner.  For those who frequent this site, some of the material will look familiar as I borrowed some of it from the DC forum.  Plans for the future are to pull together interesting links to hobby circuits from around the world.  The emphasis will be for projects that perform some useful function.  Please feel free to make suggestions.

0.5v to 6v Voltage Converter     0.5V Negative Supply      1 Amp Current Injector 1 Line Telephone Line Status Indicator    12v Light/Dark Lamp Switch    NEW  12KV High Voltage Generator   12v Lamp Current Indicator      1.5V LED FLASHER Version A 1.5V Touch Activated Switch    2 Button Motor Controller Ideal Diode Function    NEW 2 Line Telephone Line Status Indicator   NEW Infrared Remote Extender 2.45GHz RF Signal Detector  Infrared Safety Switch    NEW 24V DC Powered Beeper with 4 Separate Inputs  Isolated Power Supply for Digital Panel Meters   NEW 3v Low Battery Voltage Flasher  Light Intensity Monitor 3V Sweeping Siren Alarm  Light to Frequency Converter 40KHz Light Detector with Sunlight Immunity  Low Voltage 120vac Power Line Alarm   6V NiCd/NMH Battery Test Circuit      Machine Vibration Controls Hour Meter 9v Battery Voltage Monitor Medium Power 12v Brush Motor Speed Controller 9v Powered Xenon Photoflash Controller    NEW Modified LED Night Light            AC Current Indicator Light Modulated Laser Light Source AC Current Monitor Motion Alarm Using Piezoelectric Device  AC Line Powered LED Pilot Light   Moving Air Indicator  AC Powered White LED Strings  NPN-PNP Transistor Tester Acceptable Voltage Indicator   NEW  Ocean Wave Power Generator Demo Unit Audio Frequency Digital Noise Generator   NEW Piezoelectric Triggered Switch   Audio Signal Detector/Switch Piezoelectric Vibration Sensor Activates Switch   Automatic DC Motor Brake Pigeon Scarecrow Automotive 12v Electrical System Voltage Indicator  Pop Free Microphone Switch Basement Front Doorbell Beeper Poor Man’s Digital Counter Using Pedometer   NEW  Battery Charging Current Indicator  Poor Man's Timer Battery Powered Plus-Minus 15v Supply   NEW PWM Circuit for Motor Speed Control Broken Solar Panels Power Reminder Beeper  Brownout Voltage Tester Ramping LED Driver  Candle Power Reflected Infrared Light Switch Cheap Close-up Camera Lens RS-232 Serial Interface Status Indicator Cheap Electrostatic Discharge Tester   Reduced Power Relay Driver     NEW   Reduced Power Sequential LED Flasher Cheap Light Power Meter Run Switching Type AC Power Adapters on DC       Check Engine Beeper Shadow Activated Motion Detector Circuit Color Film Negative Makes Visible Light Blocking Filter Shake to Charge Flashlight   Computer Controlled 100ma Current Source Simple Security Wire Loop Alarm Dark Activated 12v Power Supply Switch  Small Battery Capacity Tester   NEW     DVD Recorder + TV Camera Make Cheap Data  Logger Solar Cell Test Fixture Doorknob Alarm Solar Insolation Monitor Earthquake Alarm Circuit RS-232 Serial Interface Status Indicator Electronics Field Disturbance Monitor Run Switching Type AC Power Adapters on DC      Fake Car Alarm Light Universal 3V LED Flasher  NEW Flashing LED Advertising Badge #1 Universal Flasher Using a Latching Relay   Freezer Over-Temperature Alarm Variable AC Power Supply  NEW Freezing Temperature Alarm Very Loud Piezoelectric Beeper Circuit  Front Desk Service Beeper  Very Low Voltage Oscillator     Handbook to Optical Through the Air Communications Watt-Hour Meter High DC Current Indicator    Wave Power Generator Demo System  NEW High Power LED Flasher     NEW White LED Life Tester HO Train Model Lighthouse Flasher Wig/Wag LED Flasher  NEW Honey Bee Counter    NEW Wireless RFID Smart Key Detector Homemade Corner Cube Reflector Using Glass Mirror Tiles Worm Harvester  Home Made Geophone Detects Foot Stomp    NEW   Human Traffic Footstep Alarm    Human Traffic Footstep Detector  NEW