This circuit can be used as a shield for touch control. The circuit can use any common FET like the BF245 and should never be powered by a source without a transformer.
This DC-DC converter was found in old RCA documentation. The circuit operates at 15 kHz. The...
Found in a 1967 documentation, this infrared amplifier is intended for use in a Nipkow disc camera...
This circuit provides a 1 Hz signal given by the capacitor, which can be changed. The gate is TTL...