Is there a switch which a user pushes/actuates to close, and which can be reopened with an electrical signal, and which does not consume power to stay closed or open? E.g. the user pushes the "Start" button, which closes the circuit and powers the device, then at the end of the device's cycle, it sends a signal to the switch to reset (open), cutting off its own power supply in the process. Is there a switch or component which does this, and if so, what is it called?
Optional bonus features:
- User can manually re-open the switch (e.g. by pressing it again)
- An electrical signal can also close the switch (e.g. a low-power microcontroller periodically turns on a higher-power device for, say, 30 seconds, then turns it back off)
Best Answer
You can use a latching relay. The relay would be set when a user presses a momentary switch which provides current to the coil which moves the contact closed. The relay would be reset when the electronics use transistors to provide current to the coil which opens the contact.