I recently asked a question about controlling a magnetic relay with a solid state relay.
The reason is that I'm controlling the circuit with a MCU that has a max ouput of 40mA per output pin and the coil on the relay draws 70mA. Also, the MCU is operating at 1.8V and the relay coil is 12V (as is the external load).
It was suggested that I use a MOSFET rather than a solid state relay. While researching that I have become very confused trying to iron out the information on the MOSFET data sheets.
Can anyone give me some tips to make it more understandable for a newbie hobbyist?
EDIT - what I think will work to see if I'm totally confused:
gate source threshold voltage - 1.2V (MOSFET will "turn off" under 1.2V?)
gate source voltage - 1.8V (MOSFET is designed to be fully "turned on" at 1.8V?)
continuous drain current - 2A (MOSFET is designed to handle switching up to a 2A load?)
drain source breakdown voltage - 40V (MOSFET is designed to switch up to a 40V load?)
drain source resistance - 260 mOhms (using ohm's law to calculate the load that will be placed on the MCU output pin, this is way below 40mA?)
Am I reading all of this correctly?