We find this circuit in a 1970 publication. Transistors can be replaced by current equivalents and LDR is a common type. Observe the polarity of the power supply. The SCR can be TIC106.
We find this circuit in a 1970 publication. Transistors can be replaced by current equivalents and LDR is a common type. Observe the polarity of the power supply. The SCR can be TIC106.
