Audio
Audio amplifiers, preamplifiers, volume control and more...
| Automotive
Speed control, Car battery charger and other electronic devices for car
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Games and entertainment
Electronic scoring game, the flashing heart, the millipede and more games
| Microcontrollers
Card programmers, adapters and other circuits with microcontrollers
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Miscellaneous
Schemstics that not included in other categories
| Models and model remote control
Clap activated remote, infrared remote control, radio remote control and more...
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Motor, light and power control
Dancing LEDs, Adjustable Strobe Light, Fading LEDs, Fancontrol...
| Oscillators and timers
Amplifier Timer, Mini Metronome, Sawtooth wave generator, Simple IF Signal Generator...
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PC related
PC based Frequency Meter, The Simplified I/O Interface, VGA to TV Scart...
| Power
Power Supplies, Ni -Cd Batteries Charger, Voltage Inverter and others..
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RF circuit
FM and AM radio, FM Transmitter, Powerful AM transmitter and other RF circuits
| Robotics
12-way Input/Output Interface and others...
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Security and other sensors and detectors
Fire Alarm, Metal Detector, Police Siren, UltraSonic Radar, Door Alarm...
| Telephone related
Telephone amplifier, Smart Phone light, Conversation Recorder, Simple Phone Tap...
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Test and measurement
Digital Voltmeter, Capacitance Meter, IR Remote Control Tester, Transistor Tester...
| Video and TV
Elestronic devices for TV and video
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