GoldenMotor.com Forum

General Category => General Discussions => Topic started by: Momomo on February 22, 2018, 01:15:10 AM

Title: Using a potentiometer to control smart controller instead of a throttle
Post by: Momomo on February 22, 2018, 01:15:10 AM

Hi all. I need help figuring out how to use a potentiometer instead of a throttle to control the speed on my Smart Pie with external controller. I purchased a 1megaohm pot and tried it but no luck. Help!

Title: Re: Using a potentiometer to control smart controller instead of a throttle
Post by: Bikemad on February 22, 2018, 10:49:50 AM

Hi and(https://i.imgur.com/evDSMvT.png)to the forum.

A one megaohm pot is too high a resistance to operate the controller.

I would suggest you try a 5k or 10k pot instead.

Alan
 

Title: Re: Using a potentiometer to control smart controller instead of a throttle
Post by: Tommycat on February 24, 2018, 01:56:17 PM

Quote from: fechter post_id=1358671 time=1518804832 user_id=84

You can use a regular potentiometer if you place fixed resistors in series with the 5v and ground wires.  I would use a 5k pot, but the value is not critical.  The fixed resistors for a 5k pot would be about 1.2k each.  You want the signal to go from about 1v to 4v with a 5v source.

I've also read where the high should be 4.35 volts or there abouts.

5 volt into Pot on one side tap, signal out on middle tap, and ground to other side tap...