Found in Popular Electronics from the 90s, this circuit is intended for a radar emitting pistol. The circuit is very critical for the frequency at which it operates.
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...