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.
We found this circuit in the 1972 RCA power transistors manual. The transistors admit equivalents and...
We present a DC-DC converter circuit that can operate with input voltages from 2.4 V to 14 V and...
According to the consulted American publication of the 1980s, a zener diode can be used for DC...