This circuit is used to detect PLL signals from the 4046 IC. The circuit is from an Electronics Now from October 1994. The indication is made through LEDs.
This circuit was obtained in an old European documentation. The integrated circuit used is...
The presented circuit is used to test ordinary fluorescent lamps. This circuit also has a mains...
Used in radio reception, this circuit was found in the February 1983 Radio Electronics magazine. The...