Hello, everybody.
Please see attached circuit diagram. This circuit is for putting off a load via relay contacts when the powering voltage drops a certain adjustable level.
My questions:
1) It seems possible to switch on a 12V relay when connected without a zener diode. But it is latching and not possible to switch off the relay without disconnecting the input power. Is there a way to operate a 12V relay witout using a pass transitor when connected directly to VO of LM 723?
2) Second way: When a zener diode is used in series with relay coil, a 5V relay is seems to work as required. Is this possible and reliable.
Thanks to everybody who interested on my thread.
Please see attached circuit diagram. This circuit is for putting off a load via relay contacts when the powering voltage drops a certain adjustable level.
My questions:
1) It seems possible to switch on a 12V relay when connected without a zener diode. But it is latching and not possible to switch off the relay without disconnecting the input power. Is there a way to operate a 12V relay witout using a pass transitor when connected directly to VO of LM 723?
2) Second way: When a zener diode is used in series with relay coil, a 5V relay is seems to work as required. Is this possible and reliable.
Thanks to everybody who interested on my thread.
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