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, found in a 2000 documentation, is used in simple artificial intelligence and robotic...
This more sophisticated version compared to the previous one in this section was also found in 90s...
The frequency depends on C, which must have the indicated value ratio, and also on R, which can be...