Schmitt Trigger 7400 (CB22419E)

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

Motorcycle Alarm (CB6487E)
We found this circuit in a Popular Electronics of the 90s. The MOSFET can be of any type,...
Amplifier for the Deaf (CB12866E)
In fact, the correct name would be a hearing aid amplifier. However, we use the name of the...
Relay Flasher (CB11965E)
This circuit controls a relay causing it to open and close its contacts at a speed that depends on the...