This circuit was found in a 70s documentation. The transistor is from that time. L1 has 4 turns of wire 20 in the form of 3/32 inches and L1 has 10 turns of the same wire,
The critical point in this project is the adjustment of the optical system, mainly to avoid...
This circuit, which may have appeared elsewhere on this site, is from the integrated...
This simple power supply circuit triggers when the light on the LDR reaches the level set on the...