This is a diagram of a 1970s reel or tape recorder. It is an Italian Geloso recorder, quite popular at the time. The circuit is a reference for equipment recovery.
This simple low-power circuit uses, in the original version of 1965, germanium transistors. The...
This circuit was found in a 1989 publication. The operational amplifier supports equivalents. The...
This circuit from a 1967 publication turns a short pulse into a square signal whose duration...