Speed limiter for elec. kids bike

[gasser]

Found a cheap source for 12v electric kids bike but need someway to limit the top speed to 2-3mph. Any suggestions?

[pscook]

Maybe a resistor or potentiometer of some sort? I would assume that the "throttle" directs "X" amounts of volts to the motor controller, maybe measure amount of volts required to go 3 MPH, and get a resistor that matches that amount?

Can you share this source with some of the specs of the controller unit?

[gasser]

Originally Posted by pscook

Can you share this source with some of the specs of the controller unit?

I'll see if I can get more info on the controller.

[Zman]

Put in a 6v battery.

[Zman]

Another option maybe to put a 12 head light bulb in series with the motor lead.

[pscook]

Originally Posted by Zman

Another option maybe to put a 12 head light bulb in series with the motor lead.

Or at least a light socket with a bunch of different bulbs to swap in. "It's great traction today, better install the 35w bulb." "It's raining out, probably want the 55w for better traction in the clay."

Seriously, a light bulb would do the trick; however, it would drain the battery faster as it is a constant load on the battery. You would need something that limits the power to the throttle or between the throttle and the motor controller.