This circuit was found in a 1945 publication. The circuit was stated to be part of a walk talkie. Note that, as it is a portable assembly, it was powered by batteries. The jack was for microphone insertion.
This circuit was found in a 1966 EEE. It is intended for automatic switching of the measurement range of...
This circuit was obtained from a Popular Electronics of the 90s. The SCR is of any type and the...
This is the basic receiver for the CIR12025 that consists of the transmitter. The circuit is...