This circuit with TTL integrated circuits was found in the December 1987 issue of Radio Electronics magazine. The circuit uses a LED scale and is suitable for gaming applications.
This circuit was found in the December 1992 issue of Radio Electronics magazine. The current is a...
This trigger uses two switching transistors that can still be found with some ease. The circuit is from...
This filter is inserted between the interfering device and the interfering device. The coils are...