· Pink noise generator · A Schottky-based Saw-to-Tri converter · Saw to triangle converter · Improved saw to triangle converter · Voltage controllable LFO · White noise generator · Electronic siren · Two-tone siren · Underwater...
Thursday, October 27, 2005
Misc audio (also see Music, Amplifiers, Preamp)
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Misc audio (also see Music, Amplifiers, Preamp)
Microcontroller based schematics
· PIC based packet radio encoder (PDF) · RS485-Version of the SAB80C535-Microcontrollerboard · PC IR receiver based on PIC16F84 · Record and play fast 1-bit sound on a PIC micro · AT89C2051/4051scanning 7-segment display and keypad · ...
Medical and health related schematics
· Snore alarm electronic device · Heartbeat transducer · ECG Amplifier · EKG/EEG circuit · Radiation Dosage-Rate Meter · Heartbeat monitor · Cranial Electrotherapy Stimulator · Automated crib lights · Jogging timer · Tan timer...
Lighting schematics
· Garden light switch · DMX lighting and special effects · Microcontroller Multichannel Light Dimmer · Digital timer light switch · Flashing flashlight · Flashing road baricade for construction workers · Hand clap lamp control ·...
LED related schematics
· LED Flasher · LED pulser with audible output · IR Illuminator · Flashing Christmas LED display · ICL7660 LED flasher · Variety of LED circuits · Winking LEDs · LED flashing light · LED initials · LM3909 replacement using...
Laser related power supplies and data transmission
· Light beam receiver for laser pistols · 12V supply for He-Ne laser · Laser diode transmitter · Laser power supply · Laser transmitter/receiver · Laser harp · Simple laser communicator · LASER listening device · LASER transmitter...
Monday, October 24, 2005
Infrared
· IR detector · Infrared body heat detector · Stereo IR audio receiver · General purpose IR receiver · Wireless IR headphone transmitter · Wireless IR headphone receiver · USB to infrared adapter · Infrared remote control shutter...
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