So I am creating a custom access control setup using a UNO3 and an access control power supply etc. I have most of the details worked out but I have a couple hardware questions.
My question is concerning sending a triggered 5v signal from the UNO3 to the access control power supply to the "push" contact of the power supply.
is it ok for the 5v signal from the UNO to stay on for say like an hour without burning a relay out or anything or do I need to use a relay shield.
is sending that 5v signal to the "push" contact on the access control power supply to keep it unlocked for an hour or so ok to do on a typical power supply? its not gonna burn out a relay or whatever on the power supply is it?
or is there a better way to tell the access control to turn off and stay off until i tell it to turn the electromgnetic lock back on?
Are you trying to turn on a solenoid or something similar when a code is entered? If so, most solenoids are 12v. In which case, you'll need a optically isolated relay to turn it on and off.
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no not using a solenoid, im using an access control 12v power supply which is controlling my electromagnet lock, My assumption is that I could send the 5v signal out of the UNO3 board to the "push" connection on my access control to turn off my lock indefinetly until I tell the UNO board to turn off the 5v signal which would automatically rengage my magnetic lock
So just wanting to make sure both the UNO can keep that 5v signal on as long as I want without burning it out and make sure that a access control power supply can have the "push" connection active for extended period too without burning it out?
Just use a relay. You'll save yourself a real headache, such as what exactly is the push connection? Is there any chance it could backfeed into your arduino and fry it?