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.

Preamplifier with the BC549 (CB15720E)
The circuit shown in the figure serves as a pre-amplifier with a voltage gain of around 12 times,...
Temperature to period converter (CB21594E)
Based on Texas Instruments documentation, this circuit serves for sensor interfacing. The circuit is...
Small FM Transmitter (CB15832E)
This article is from a publication by A. Fanzeres from the 70s. We kept the original text. This...