This circuit produces sounds of 6 different notes depending on the keys activated. The circuit is from a Radio Electronics from May 1965. The transistor must be equipped with a heat radiator.
This 13.6 V power supply with 8 A output was suggested by Texas Instruments in the documentation of...
This sophisticated filter for audio signals was found in Radio Electronics magazine. The...
This circuit was found in a 1977s English magazine. The SCR can be the TIC106 and the transistor the...