Employing the XR2206 IC, this circuit was found in the May 1977 issue of Radio Electronics magazine. The formula next to the diagram gives the component values as a function of frequency.
This circuit was obtained in a Radio Shack documentation from 1977. The circuit generates a...
This commercial circuit of 3 transistors was found in Japanese documentation from the 1960s. The...
This electronic car lock was found in a 1988 magazine. It uses a code key that must be activated to...