Found in a Popular Electronics from the 90s, this circuit applies to flashes with xenon lamps. The transistor admits equivalent and the phototransistor is of the Darlington type.
This circuit for 40 V systems was found in a Linear Technology application manual. The circuit...
This circuit was obtained in a 90s Popular Electronics. In the table the values of the components...
This transmitter for the 7 MHz range, as we can assume by the number of turns of the coil, since the...