This organ, played by a probe was found in no old documentation, but it can be easily implemented these days. The integrated circuits are 555. The trimpot allows individual tuning of the keys.
Found in a Popular Electronics from the 80's, this circuit makes use of a time integrated to...
This random noise or white noise generator was published in Radio Electronics magazine in July...
With this circuit it is possible to control two LEDs of different colors, making their color...