Through the TTL output this circuit can be used as a shield. The sensor is a platinum probe, and the operational amplifier can be replaced by a modern equivalent, preferably of low voltage.
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...