Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 40,000+ electronic circuits, cross-referenced
into 500+ categories.    We have searched the web to help you find quick design ideas.
We make every effort to link to original material posted by the designer. 
Please let us if you would like us to link to or post your design.

HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches

Motor Control Circuits   Page 3
Motor Controls:  #-B     C     D-G      H-L        M-O      P-R       S      T-Z

Last Updated on: Thursday, April 07, 2016 01:01 PM


Circuits Designed by Dave Johnson, P.E. :
  • DC Motor Brake
    When the power switch is closed, the gate voltage of Q1 turns Q1 on.  The drain of Q1 swings low, turning off Q2. Current flows freely into the DC motor with only one diode drop from D2.  When the power switch is open.  The gate voltage of Q1 swings low, causing the drain of Q1 to swing high. This turns on the transistor Q2.  With Q2 on, the resistor R3 is switched in parallel with the motor, producing a braking action.  The value of R3 can be selected for the desired braking action.  A zero ohm resistance will produce the fastest slow down of the motor.  The circuit below is good for about 500ma of motor current.  A Q2 transistor with a lower on resistance would be needed for bigger motors.  Also, D2 would need to increase in size

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Dark Activated Switch -  This circuit will activate a relay when light falls to a preset level. Light level can be adjusted with VR1 and the relay contacts may be used to operate an external light or buzzer.… [Andy Collison]
DC Motor Brake -  When the power switch is closed, the gate voltage of Q1 turns Q1 on.  The drain of Q1 swings low, turning off Q2. Current flows freely into the DC motor with only one diode drop from D2. …. [Designed by David A. Johnson]
DC Motor Control Circuit -  This circuit uses solid state switching (transistors) to control direction of a DC motor. You have precise control of the movement of the motor, and an indication of direction provided by LED's…..(schematic / circuit added 2/07)
DC Motor Control using a Single Switch -  ....
DC Motor Controller (jcmiras.net) -  This DC Motor Controller circuit will control a 12V dc motor. The system will have three pushbuttons...
DC Motor Driver with L6203 -  The L6203 is a DMOS full bridge driver, which can handle the high peak current up to 5A and supply voltage up to 48V with RDS (ON) of just 0.3 ohm. The chip can run the motor at 4A continuous with proper heat sinking…..(electronic schematic added 11/06)
DC Motor Model -  Although SPICE does not provide explicit models for electro-mechanical devices, like a DC motor, creating one is fairly straightforward. You just need to remember that most physical behaviors, whether mechanical or electrical, can be described by a set of equations. So for a desired....(spice design added 02/09)
DC Motor Pulse Width Modulation Speed Control -  This is a circuit for controlling the speed of small DC motors, it works nicely as a speed controller for an HO or N gauge model railroad. (electronic diagram added 11/06)
Consulting Services include:
  • Applications Engineering
  • Design & Development
  • Electronic Circuit Design
  • Custom Test Fixtures

    Hourly Rate $100.00
    (Minimum Fee $400.00)
806-368-7747 or
Email Dave
DC Motor Reversing Circuit (Christian Sanchez) -  A DC motor reversing circuit using non latching push button switches. Relays control forward, stop and reverse action, and the motor cannot be switched from forward to reverse unless the stop switch is pressed first. (added 4/02)
DC Motor speed Controller -  Scroll down to find link to circuit drawing and circuit explanation….(electronic schematic added 09/06)
DC Motor-Driver H-Bridge Circuit -  Physical motion of some form helps differentiate a robot from a computer. It would be nice if a motor could be attached directly to a chip that controlled the movement. But, most chips can't pass enough current or voltage to spin a motor. Also, motors tend to be electrically noisy (spikes) and can slam power back....[David Cook]
DC Motor-Driver H-Bridge Circuit circuitdb -  Physical motion of some form helps differentiate a....(added 2/07)t from a computer. It would be nice if a motor could be attached directly to a chip that controlled the movement. But, most chips can't pass....
DC Push Button Motor Control -  This circuit uses solid state switching (transistors) to control direction of a DC motor. You have precise control of the movement of the motor, and an indication of direction provided by LED's…. [Andy Collison]
DC servo Motor driver -  site is currently under construction [Site is under construction right now]
DC Servomotor Controller -  An experiment on the DC servomotor control system. It is controlled with only an AVR.  (
Delayed shutter control for Kodak DC-20 -  (circuit added 1/07)
[Google-ADS/i-ad-728x15-Links.htm]

            Next Page

Motor Controls:  #-B     C     D-G      H-L        M-O      P-R       S      T-Z


HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |    Privacy Policy

Copyright  2002 - 2015 David A. Johnson & Associates.  All Rights reserved. 
 Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.