Slowing down DC motor

[Mark]

Hi, electronics has been a hobby but I'm no EE so I'd appreciate any
help. An RC motor I'm integrating into another project is too spunky
and responds too quick to the remote. I'm thinking of putting a
resistor/potentiometer in-line with the battery for a quick and easy
solution. If anyone else has any simple and quick suggestions, I'd
appreciate it. Thanks.

 

[Terry Pinnell]

kram12085@gmail.com (Mark) wrote:

Hi, electronics has been a hobby but I'm no EE so I'd appreciate any
help. An RC motor I'm integrating into another project is too spunky
and responds too quick to the remote. I'm thinking of putting a
resistor/potentiometer in-line with the battery for a quick and easy
solution. If anyone else has any simple and quick suggestions, I'd
appreciate it. Thanks.

Your motor is probably of relatively high power type, so a resistor
would have to be rather high wattage, and would get pretty hot.

Another technique (that doesn't rely on dumping excess power as heat)
is Pulse Width Modulation. Googling the groups with
pwm "motor speed control"
gave me these 256 hits:
http://tinyurl.com/663vx
the first of which is 'Help with motor speed control'.

I may well be taking a look at those myself, as I want to tame the
ex-screwdriver motor I've used in my Curtain Controller!

--
Terry Pinnell
Hobbyist, West Sussex, UK

 

[Larry Brasfield]

"Mark" <kram12085@gmail.com> wrote in message news:5ef3f02a.0412022308.21065865@posting.google.com...

Hi, electronics has been a hobby but I'm no EE so I'd appreciate any
help. An RC motor I'm integrating into another project is too spunky
and responds too quick to the remote. I'm thinking of putting a
resistor/potentiometer in-line with the battery for a quick and easy
solution. If anyone else has any simple and quick suggestions, I'd
appreciate it. Thanks.

You have not indicated how large the motor is, but unless it is
quite small or your potentiometer is rated for that use, you
are likely to damage the pot by using it that way. Using a
resistor to slow the motor will degrage its speed regulation.
That may not matter depending on what the motor drives,
(another unknown, except to you). A few 1N4002 diodes
in series would probably be better with respect to speed
regulation. You can adjust speed by adding or removing
series diodes.

--
--Larry Brasfield
email: donotspam_larry_brasfield@hotmail.com
Above views may belong only to me.