This circuit is an alternative to the previous circuit. We found it in the same article in the Radio Electronics magazine of March 1992. The integrated circuits are the LM3914.
This oscillator circuit for sinusoidal audio signals with operational 741 requires a symmetrical power...
Found in a 1974 Radio Shack documentation. This circuit must have a connection to the ground of...
This sensitive circuit detects the live pole of a power grid or outlet. The circuit makes use of a high...