This circuit was found in the September 1992 issue of Radio Electronics magazine. The circuit does not use a transistor to drive the relay and has no adjustments.
This circuit is more sensitive than the previous one (CB4118E) for using a full wave detector. The...
We found this circuit in the August 1994 issue of Electronics Now magazine. The circuit is based on...
This circuit, suggested by National Semiconductor, decodes audio signals from stereo TV...