kinarfi
Well-Known Member
I have a linear motor that fried part of the circuit board and I am trying to modify it. It has 4 wires coming out, 2 will be for the motor driven by an external H-bridge and 2 for the end of travel switch which is 2 spdt limit switches. I have a spdt switch to choose whether the motor is extended or retracted. What I need it a method to that works as if I had 3 wire.
Any suggestions that aren't too complicated, maybe a 555 or voltage divider. As I see it, I have 3 positions, extended, retracted, and travelling.
Thanks,
Kinarfi
PS. The H-bridge has both NFETs turned on and both PFETs turned off because Vgs is + on all FETs and to drive the motor one way or the other, one side of the H-bridge it tied to - and the end of travel switch removes that - and only the NFETs are turned on again.
Any suggestions that aren't too complicated, maybe a 555 or voltage divider. As I see it, I have 3 positions, extended, retracted, and travelling.
Thanks,
Kinarfi
PS. The H-bridge has both NFETs turned on and both PFETs turned off because Vgs is + on all FETs and to drive the motor one way or the other, one side of the H-bridge it tied to - and the end of travel switch removes that - and only the NFETs are turned on again.