Found in a 1948 MIT documentation, this circuit uses a 0 to 100 uA microammeter as an indicator. The power supply is 150 V.
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...