Newest circuit diagrams
Metronome Circuit
A metronome circuit based on a simple astable. The output sound is distorted to emphasize the pulses. Read more...
Magnetic-Radiation Remote-Control
Short-range 35KHz operation, single-channel units. Simple circuitry, no outer antennas required Read more...
Radio Wave Alarm
This simple circuit is sure to have the police beating a path to your door- however, it has the added advantage of alerting you to their presence even before their footsteps fall on the doormat. Read more...
Plant Watering Watcher
A flashing LED signals the necessity to water a plant Very low current consumption - 3V powered circuit Read more...
Water Level Alarm
A circuit that offers visual indication of fluid level in a vessel, with a switchable audible alarm. Example uses would be to monitor the level of water in a bath or cold storage tank. Read more...
Audio Voice-Over Circuit
This is a circuit where a microphone and preamp circuit (voice circuit) have priority over any other audio signal. You can think of this as a one way intercom, if the main amplifier is used for listening to music, then when the push to talk switch is pressed, the amplifier is switched to the voice signal. Read more...
Energy Saving Soldering Station
This circuit appears in the test circuit section because the soldering iron is one of the most used service aids. This circuit, will not only save power when the soldering iron in not in use, but will also preserve the tip life. Read more...
