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.
This modulator circuit is nothing more than an audio amplifier that serves to modulate amplitude...
This circuit is from 1995 documentation. When the phone is lifted, the relay closes its contacts by...
The basic idea of this circuit found in a 1988 documentation is to transmit a signal modulated using...