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 generates interval signals controlled by a light sensor. The basic time of the sound...
This 1968 Mullard circuit detects fire by smoke using LDR-type sensors. The circuit makes use of...
With this circuit it is possible to generate 3-phase rectangular signals from a clock signal. The...