The integrated circuits used in this configuration are not common today. The circuit is from the 1983 Intersil Databook. The indicator is 8 digits.
This VHF transmitter was found in Radio Electronics magazine from June 1964. The transistor is an...
This is a simulation of a Relaxation Oscillator using a programmable unijunction transistor (PUT). The...
This circuit is from a 1968 Electronics World. It acts directly on a high voltage alternating...