This 80's circuit uses a microcontroller programmed to generate various songs. The circuit can serve as the basis for a modern design, for example using Arduino. The old circuit included a small audio amplifier.
This circuit identifies the polarity of DC signals and if the signal is AC. The circuit is from...
This circuit can be powered by 2 or 3 small batteries. The resistor can have values between 220...
ABB drives the energy revolution with newly emerging use of solar power in Singapore Land scarcity has...