Categories of electronic circuits
| Audio Audio amplifiers, preamplifiers, volume control and more... | Automotive Speed control, Car battery charger and other electronic devices for car |
| Games and entertainment Electronic scoring game, the flashing heart, the millipede and more games | Microcontrollers Card programmers, adapters and other circuits with microcontrollers |
| Miscellaneous Schemstics that not included in other categories | Models and model remote control Clap activated remote, infrared remote control, radio remote control and more... |
| 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... |
| 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.. |
| RF circuit FM and AM radio, FM Transmitter, Powerful AM transmitter and other RF circuits | Robotics 12-way Input/Output Interface and others... |
| 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... |
| Test and measurement Digital Voltmeter, Capacitance Meter, IR Remote Control Tester, Transistor Tester... | Video and TV Elestronic devices for TV and video |