This circuit was found in a 1980s documentation, using a comparator from the time. The configuration can also be implemented with comparators or modern operational.
This circuit was found in a 90s American documentation. The circuit uses an LED that can be of a...
This circuit can be used to test zener diodes up to 25 V using a standard multimeter. The voltage...
This capacitive switch or approximation relay was found in a 1980s US publication. Power should...