This circuit was found in the November 1994 issue of Electronics Now magazine. The circuit is based on the 566 PLL and generates signals up to about 200 kHz.
This circuit was found in a 1966 EEE. What it does is it converts the logic levels of 0 V and +4 V...
This circuit has been found in operational documentation of the 1970s. The circuit has a fail-safe...
This simple circuit does not use active components and uses a small speaker as a microphone. The...