This circuit makes use of a specific 80's component and was found in an American manual of the time. A matrix keyboard allows you to select one of several music programs.
This 12 or 13.8 V stabilized source is suitable for experimental FM transmitters that require...
This circuit uses a TL071 to differential amplify the signals from a microphone and thus reduce...
Found in Motorola documentation from the 90's, this circuit charges the capacitor with a constant...