Found in American documentation from the 1990s, this circuit has active cycle control. The basic components are given along with the diagram. Transistors are general purpose.
P1 on this Radio Shack circuit is a 6 V lamp with current up to 500 mA depending on Q2. The...
This simple touch alarm, found in a 1995 documentation, uses common components and a triac to...
With the micro voltage regulator shown in the figure, we can design a power supply for small...