We found this circuit with SCRs and unijunction in a Radio Electronics magazine from June 1969. The SCRs must be in accordance with the controlled incandescent lamp. The circuit is powered by DC.
This is a different circuit for a component from the past, the zirconium arc lamp used in...
This circuit uses a FET to drive an LED with constante currente. The current up to 20 mA can be...
This circuit uses a phototransistor as sensor. The changes in the resistance of the transistor,...