The integrated circuit used in this detector is uncommon today. We found it in a documentation from the 70s. Detection is done by an optical camera with LEDs and a photo sensor.
When the phone rings, a high-powered incandescent light comes on. This circuit can be interesting to...
The sensors and integrated circuit used in this circuit are uncommon today. However, it is worth...
This oscillator produces a signal with a central frequency in 1 MHz. This frequency can be...