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 is a wireless temperature transmitter for RF signals in the range of 0.2 to 2 MHz...
We found this circuit in an old Radio Electronics. Components can be replaced by modern...
This immobilizer circuit for vehicles was found in a 80’s Hands On Electronics. The circuit...