hi, I am working on a lil project which will automatically shut off when a voltage drop is detected. I know this is just as easy as a low battery indicator but instead of driving a LED I need a relay to turn on a high current device so I use a relay but I can't figure out which transitor to turn on the relay.
Enviroment:
For a high current application >15A
when voltage drop from 14 to 13, power OFF.
otherwise ON.
so 14V ON --> 13V OFF
Here's what I came up but need some suggestion.
a NPN transistor
13V Zdiode
12V relay + 1N4001
I am stuck on which transistor I should use. Can anyone help?
Enviroment:
For a high current application >15A
when voltage drop from 14 to 13, power OFF.
otherwise ON.
so 14V ON --> 13V OFF
Here's what I came up but need some suggestion.
a NPN transistor
13V Zdiode
12V relay + 1N4001
I am stuck on which transistor I should use. Can anyone help?