This circuit for old flashes with xenon lamps was found in a Radio Electronics magazine from June 1966. The sensor is a photoelectric cell from the time. Power is supplied by a 9 V battery.
We found this circuit in the November 1985 issue of Radio Electronics magazine. It uses TTL...
The basis of this circuit is a CA3130 operational amplifier. The transistor can be BC548, and the...
This circuit switches off a load in case of excess current acting as a fuse. The circuit is from a...