Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

DC motor speed control
DC motor speed control
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 11th June 2020, 03:47 PM   #1
Vrystaat is offline Vrystaat  South Africa
diyAudio Member
Join Date: Jan 2012
Location: Bloemfontein
Default DC motor speed control

Good day all.
I need some advice plse. I have a motor that is mounted on a rotisserie, It works from 3Vdc ( 2x 1.5V batteries in series). I want to make an adjustable circuit between 3 to 5Vdc to drive the motor without having to worry about batteries.I have 12V 1.5A smps's that I want to use as they are small.
the resistance of the motor is 2.8R, meaning the current will be 1.071A at 3V and 1.78A at 5 volt. Watts drawn will be 3.21 and 8.9 watt respectively.
I have used a 11R 25 watt resistor as a voltage divider to test, The voltage is almost 3Vdc but the resister gets hot soon. What would be the easiest way to control the motor without having to use a bulky circuit, well I can all way's use a long connecting lead. This is what I have in mind, Would be using a mosfet work better ? Help appreciated
Attached Images
File Type: jpg motor.jpg (17.1 KB, 26 views)
  Reply With Quote
Old 12th June 2020, 02:59 AM   #2
Refugee1 is offline Refugee1  United Kingdom
diyAudio Member
Refugee1's Avatar
Join Date: Jul 2012
Location: Worksop
You can buy or salvage from an old computer board 4 legged SMPSU chips from things like V-Core regulators.
You need to be handy with a modeling knife to make the PCB.
There are three or four external components.
SMD marking code websites are an evening of fun once you find something close.
There are some variable ones out there on old motherboards that have V-Core settings in the BIOS.
  Reply to this post


DC motor speed controlHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Hurst Motor and speed control kolledog Swap Meet 3 13th June 2011 11:50 PM
Speed control for syncronous motor 3GGG Power Supplies 10 29th January 2011 12:45 AM
Motor Speed Control Kit vdi_nenna Analogue Source 2 25th January 2011 11:55 PM
DC motor speed control winggo Analogue Source 13 25th August 2008 01:48 AM
turntable motor & speed control space-cake Analogue Source 0 22nd September 2007 07:51 PM

New To Site? Need Help?

All times are GMT. The time now is 08:11 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio