This circuit is from a 1980s Motorola documentation. The circuit makes use of old components that can in some cases be exchanged for modern equivalents.
This circuit has an opposite action to the previous one, triggering when light falls on the...
This circuit uses two JFET such as the BF244 or BF245 and has an excellent gain with small...
This switching boost regulator, which provides a 24 V output from a 12 V input, was found in the...