Found in a 1980s American documentation, this circuit has a current consumption of only 1 mA. The crystal can be from 100 kHz up to a few megahertz.
This low voltage AC control uses a triac. Any TIC series triac can be used and this device must be...
This circuit was found in a 1987 magazine. It measures the pulse rate produced by a cardiac...
The field effect transistors have characteristics that allow the realization of excellent...