Thanks for that thorough explanation! Unfortunately, I'm still not following 100%.
I had already ordered this MOSFET:
[www.sparkfun.com]
I'm pretty sure that one should be able to handle the current and voltage with no problems.
When I ordered it, I was planning on using the heatbed output from the board as the gate for a circuit like this:
[www.electronics-tutorials.ws]
Obviously the motor stuff would be replaced with the heatbed.
But you're saying having the onboard MOSFET feeding the new MOSFET like that wouldn't work well because it'd be slow?
I would prefer not to try to reinforce the traces. I can do basic soldering, but I'm not particularly skilled and don't want to screw up the board. Could I do something like on the attached drawing?
Basically what I'm thinking is:
Would that work?
Edit: I think I actually accidentally reversed + and - on that drawing, it looks like it's negative that goes through the MOSFET? Does that mean I need a P-type MOSFET or an N-type MOSFET? Luckily I ordered both, so I can use either one.
I had already ordered this MOSFET:
[www.sparkfun.com]
I'm pretty sure that one should be able to handle the current and voltage with no problems.
When I ordered it, I was planning on using the heatbed output from the board as the gate for a circuit like this:
[www.electronics-tutorials.ws]
Obviously the motor stuff would be replaced with the heatbed.
But you're saying having the onboard MOSFET feeding the new MOSFET like that wouldn't work well because it'd be slow?
I would prefer not to try to reinforce the traces. I can do basic soldering, but I'm not particularly skilled and don't want to screw up the board. Could I do something like on the attached drawing?
Basically what I'm thinking is:
- Remove the current MOSFET
- Solder lead from the Gate trace to the new MOSFET Gate
- Solder trace from + terminal to MOSFET source
- Solder trace from MOSFET drain to heatbed
- Solder trace from - terminal to heatbed
Would that work?
Edit: I think I actually accidentally reversed + and - on that drawing, it looks like it's negative that goes through the MOSFET? Does that mean I need a P-type MOSFET or an N-type MOSFET? Luckily I ordered both, so I can use either one.