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i need help with some dc power rc controled motors? Answered

i have a 110v dc power supply . i need a way to make a 12 or 24 volt dc radio  controled motor to run off of it ..  how do i make this happen ?
 the motor needs to be able to go forward and reverse . low rpm but decent torque . going to be a gear drive system , also needs to be able to stop quickly at any point i leave off the forward or reverse button as well as goes to apoint forward and reverse and stops on its own .. 

for the remote i would like to have a push button, just push one for forward the opther for reverse .. if not i guess a small joystick or switch would do ..  but the whole remote needs to be pretty small ..

for the dc motor it could be the size of an rc car motor .. as i said though low rpm .

as far as electronics go im pretty well a beginner bit i just have a project in mind .. any help would really be appreciated



5 years ago

A dc gearmotor that can run forward or reverse 1to 5  or 7 or ten or 30 RPM
THAT RUNS OF 120 VDC and can JOG forward / reverse is readily
available from Grangers with or without brake... 
they are small and quieter the your expect .


I looked at the grainger motors and they are way to big .. I'm looking for a motor the of an rc cars motor . All I need it to do is go reverse forward and stop at any point I need it to by leaving off the button or switch .

It's a good posibility that I am explaining what I need in the wrong way .. take a remote controlled car for example ... It does almost everything I need it to do .. accept run off of 120-110 VDC . I need a way to step the large voltage ( coming from a house receptical on an old dc generator ) down to 12-24 volts in order to power a really small dc motor .. something similar to what some people use in robotics ..

And like the car it needs to be remote controled and wireless .. problem with the cars controler is that it is very large and I just need one of the small joysticks from a controler for forward and reverse and in the middle to stop it when ever it I need it to aka neutral .. ..

Is this possible or am I just way out in left field Haha .. again I'm sorry .. I know next to nothing about electronics

1. You nee to reduce the voltage of you supply 110v is far too high and dangerous.

2. Reducing 110v DC is a trifle difficult for a beginner and I suggest you will be better served by looking for or buying a suitable voltage power supply first.

3. For most small motors a battery will do fine - If you want longer operation then something like a car batter will operate for many weeks under light use.

4. To control the motor you need an H bridge - although there are electronic ways to do this it is most likely easier in your case to use 2 relays - You need a rely that operates off your power supply and it needs to be a double pole relay.

Connected as in the diagram below it will allow you to operate the motor in either direction. When relay A is on AND Relay B is off the motor runs one way

When Relay A is off and Relay B on it runs the other way

When both relays are on or Off the motor stops.

NC = Normally closed contact
NO = Normally open contact

Red square is the push button.

This assumes you have a motor that runs off 12 volts.

IF that is different then select a suitable power supply and relay.

How relays work

I offer 2 more similar suggestions the first uses 2 switches double pol Both switches up or both down to stop the motor.

The other uses a single double pole double throw switch - If you get a centre off then you can stop the motor easily -

have fun.

switched H bridge.jpg

I really wish I could run it off of a battery but unfortunately I can not do so .. it will be running off of an old dc generator that has 110vdc thank you for the diagrams and your help .. I really appreciate it !!!