Using a MOSFET as an on/off switch (for me) is OK providing it isn't required to be done at high speed.
I can use a resister between gate and source.
And I've also tried using resistive loads at speeds of 50 - 100 on/offs per min. When I do this it of course needs more power to drive the gate because of the path to source.
What might be better? A transistor cut-off? A bigger drive and big resister?
* I don't have a 'proper' MOSFET driver.
* I will be satisfied if the MOSFET can switch hard-on to hard off about 50 times / sec. - I'll progress up from there later when I can do it properly at a slow speed.