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 control is intended for 110 VAC or 220 VAC Motors. Any TIC series triac can be used according the power...
This 1965 General Electric circuit uses a "Thyrector" that is a suppressor of the time. The...
The S-meter is a signal strength meter used in communication receivers. This circuit was found in...