Changing a fixed speed trolling motor to a variable speed?

**pstone** · 02-27-2008, 11:26 PM

I'm game to make me one! Lets see it.

I have a buddy that is into the electrical stuff if I don't follow.

Thanks CP!

Originally Posted by Cane Pole

Motor speed control out of Wal Mart electric shopping scooter works fine.

I have a circuit you can build if you can build electronic circuits. Parts bout $20.00. 40A-50A max...Simple pwm. Mine works fine. Several people built them. Ain't nobody shot me yet cause it didn't work. I ain't heard any complaints. Not for the unskilled or lame. It is rfi intense (pwm) and not for the pacemaker people. The circuit is hiding somewhere on my computer.

Anyone is welcome to use it. I am not responsible for your wiring, etc.

Tom

**Cane Pole** · 02-28-2008, 09:13 AM

Disclamer. I am not responsible for anyones wiring. If you can't wire, don't try it.

I would mount the circuit in a good metal box . Use good heat sinks for the IRF fets. Waterproof the box and the circuit board. This circuit gets really warm, so be aware of this when mounting box.

the 100k potentiometer should be a sealed type to keep the grit out. If you mount the pot remotely from the circuit box, I would twist the wires to/from the box to reduce coupled noise.

Wire the heave outline with same size wiring as you boat tm wiring. Lots of current here.

I have used this circuit numerous times, so I know it works.

Good luck,

Tom

**pstone** · 02-28-2008, 02:51 PM

Thanks Mr. Cp. I got my buddy working on that right now. It looked to be a little more than I could handle. How do you hook it up when it done?

Thanks, sorry bout all the questions.

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