Phase Detector 7400 (CB22427E)

This circuit detects the phase of a signal. As it is a TTL circuit, it must be powered by a voltage of 5 V.

Overtemperature Switch 741 (CB25866E)
The circuit is from a June 1995 Electronics Now. The relay is power-dependent and both R1 and R2...
Crystal calibrator (CB6900E)
This circuit for several frequencies was obtained in an American documentation from the 90s. The...
Stepper motor control with the SLA7032 and 33 (CB12549E)
The circuit shown in the figure is suggested by AllegroMicro (www.allegromicro.com) and consists of an...