Hi everyone,
I am currently busy with a UPS for a micro-controller board that I'm working on. Currently what I have functioning is when there is power outage, I am able to switch to battery power and safely shutdown my board. Likewise, I am also able to power on the board when power comes back on. Both situations are triggered by a buffer contact that comes with the UPS.
What I need now is to cater for brown out situations where power might come back on and in a short space of time, go back off again. I need a simple circuit that can be able to monitor if the buffering contact has been closed for a specific amount of time before I initiate the restart of the board. If the contact opens before that time, no restart should happen, and the timing should reset, and wait for next closed switch even.
Thanks in advance
I am currently busy with a UPS for a micro-controller board that I'm working on. Currently what I have functioning is when there is power outage, I am able to switch to battery power and safely shutdown my board. Likewise, I am also able to power on the board when power comes back on. Both situations are triggered by a buffer contact that comes with the UPS.
What I need now is to cater for brown out situations where power might come back on and in a short space of time, go back off again. I need a simple circuit that can be able to monitor if the buffering contact has been closed for a specific amount of time before I initiate the restart of the board. If the contact opens before that time, no restart should happen, and the timing should reset, and wait for next closed switch even.
Thanks in advance