This toy transistorized organ was found in the May 1970 issue of Radio Electronics magazine. The trimpots are adjusted to the musical notes according to the key.
Found in a 1980s telecommunications documentation, the circuit presented acts as a product...
It can be obtained from Mouser Electronics new transceiver modules long range (LORA) Microchip...
Working with the previous circuits, this circuit resets after 1 second. The circuit is from Radio...