I want to use an FSR (force sensing resistor) to turn on a 300-350mA (steady state) 4 volt DC motor while one press into the FSR. As the image shows my plan is to have a voltage divider between the FSR and some other resistor such that, once you press into the FSR the voltage in the (-) input terminal increases and it turns the output of comparator high which in turn turns the mosfet ON driving the DC motor. I have found those comparators(NCS225x) that will work at low voltages (3-5v) and output enough current (about 40mA) do you guys think this setup will work properly? Also, what mosfets would you recommend using for a low side driver of a 3-4v motor?
Data sheet for the comparators: https://www.onsemi.com/pub/Collateral/NCS2250-D.PDF
The difference between NCS2250 and NCS2252 is that the NCS2250 has a "complementary push pull output" while the NCS2252 has an open drain out put. What does that mean in terms of my application? Thanks!