Schmitt Trigger 7400 (CB22419E)

This low hysteresis circuit was obtained from old documentation. The circuit must be powered by a voltage of 5 V.

Water alarm with lock (CB6957E)
Published in an old Popular Electronics, this circuit makes use of components that are still...
Darlington Modulator (CB14800E)
This modulator circuit for transmitters was found in American documentation from 1964. It can be...
Sine wave generator (CB24195E)
This circuit for frequencies from 1Hz to 100 kHz was found in the June 972 Radio Electronics...