This circuit is from an American 80's documentation. The integrated circuit is from the time and the sensor consists of a smoke chamber measuring its transparency change.
Found in an 80's documentation this circuit uses an integrated from the uncommon era today. Other...
Powered by just 1.5 V this 80's amplifier uses an integrated circuit of the era. The circuit is...
This circuit works in the opposite form to the previous one and drives a relay as a load. The...