Optical potentiometer (CB22159E)

This voltage-controlled potentiometer using an LDR was found in an English documentation. LDR is common and LED of any type.

Time delay (CB23969E)
This circuit turns on a lamp after the time set on the potentiometer. The circuit is from a Radio...
20 W Class AB Amplifier (CB6283E)
This circuit was suggested by General Electric in a 1969 documentation. The transistors are of the...
0 to 12 V power supply with 1 A (CB8165E)
Found in a 1991 PE Hobbyst Handbook, this unit can actually supply 1.5 A with the LM317 and 3 A...