This circuit uses components that are still common despite being from 1995 documentation. The circuit can be powered by 6 to 12 V voltages and the speed of the LEDs' sliding effect is set to P1.
With this circuit, signals in the range of 10 kHz to 150 kHz can be received at close to 4 MHz...
This blocking oscillator configuration was found in a 1964 American book. The circuit can be...
This circuit shows how we can take advantage of two old phones in a simple communication system. The...