This circuit uses a 555 (according to the diagram) to generate 50 ms tone bursts at a frequency of 1.5 kHz. The circuit is from an 80's Electronic Design.
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...