First time asking a question here. I have a Hall sensor A3144 that goes to low when a magnet activates it. So I can use a magnet with it to complete a circuit, say, connecting the output to a red LED to 5V.
But I want the output to connect to the gate of a MOSFET so I can turn on an electromagnet with higher voltage using drain and source. For testing, I'm using a green LED instead of an electromagnet.
The problem is that I get the opposite of what I want. With no magnet, the Hall sensor outputs a small voltage (in this case around 1 volt), and the MOSFET receives this small voltage to the gate, and the green LED turns on. With a magnet, the Hall sensor drops to 0 volts and the green LED turns off.
I need the opposite to happen. I need the green LED (or the electromagnet) to turn on when the Hall sensor detects a magnet and be off otherwise. Can you help me do this?