This circuit uses the LM2931 which is not a common component today. What it does is to activate a lamp causing it to blink at a frequency determined by the capacitor.
.
This plug-in control was found in General Electric documentation from the 1970s. The SCR can be...
This circuit digitally selects the inputs of a sound system by applying its signals to the...
Found in 1965s General Electric documentation, this circuit is intended for the control of servos...