I'm building this:
http://www.voltscommissar.net/minimax/minimax.htm
I tried substituting an LM393, but any mosfet I've tried gets too hot to touch, and the performance
of the circuit seems poor as well, but I can hear it whine, so I guess it's working somewhat. Adjusting
to the 2k pot do make the difference between motor starting and not starting.
I've even tried a logic level IRLZ44N, but that too gets hot, although not
as quickly, it takes a few seconds more... The circuit and motor draw 8A.
Is it my choice of comparator, or do I need to look further?
http://www.voltscommissar.net/minimax/minimax.htm
I tried substituting an LM393, but any mosfet I've tried gets too hot to touch, and the performance
of the circuit seems poor as well, but I can hear it whine, so I guess it's working somewhat. Adjusting
to the 2k pot do make the difference between motor starting and not starting.
I've even tried a logic level IRLZ44N, but that too gets hot, although not
as quickly, it takes a few seconds more... The circuit and motor draw 8A.
Is it my choice of comparator, or do I need to look further?