Hi folks, I have a pic running off a car battery, I want to take samples of battery voltage so have come up with the following circuit.
I have used a P FET (BS250, it's all I have) to switch the 14v on/off, but as the controller side is 5v max I clearly won't be able to turn this FET off...
I would be interested if anyone knows of a small 3-pin package FET that will work with 5 or 3v3 logic so I can get rid of the extra stage, I know there are a good few N types available.
Anyway, is this about as simple as I can make it?
https://photos.app.goo.gl/2JNCMMnKPgywwuPy8
I have used a P FET (BS250, it's all I have) to switch the 14v on/off, but as the controller side is 5v max I clearly won't be able to turn this FET off...
I would be interested if anyone knows of a small 3-pin package FET that will work with 5 or 3v3 logic so I can get rid of the extra stage, I know there are a good few N types available.
Anyway, is this about as simple as I can make it?
https://photos.app.goo.gl/2JNCMMnKPgywwuPy8