We found this circuit in a Japanese 1968’s documentation. The circuit makes use of transistors from that country common at the time of publication. Observe the symmetrical power supply for the circuit.
This circuit was found in an old Popular Electronics. The integrated circuit is equivalent to a...
The integrated circuit used is not common today, as it is a configuration of Motorola Linear...
This code switch only activates a relay when the right sequence of buttons is pressed. The circuit...