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Miniature high-rate speed control: A miniature high-rate speed control published in the newsletter published by Electric Model Flyers' of Southwestern Ontario (diagram add |
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Miniature low-rate speed control: A miniature low-rate speed control published in the newsletter published by Electric Model Flyers' of Southwestern Ontario (diagram added 11/06) |
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MOSFET
Switch provides efficient AC/DC conversion: 02/17/00 EDN-Design Ideas / (added 10/03) |
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MOSFET based speed controller uses 9 IRFZ40 power MOSFETS: |
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MOSFET
H-BRIDGE schematic and theory: (diagram added 2/07) |
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Motor Control scheme yields four positions with two outputs: 02/07)/02 EDN Design Ideas / (added 10/03) Figure 1 showshow to position a mechanical device into
four discrete positions but with only two free outputs and one free input from the control system. The position depends on a set of cams and four corresponding limit switches. The 24V-dc motor
comes with a worm gear. Darlington transistors Q3 to Q6 and resistors R7 to R12 form an H-bridge that drives the dc motor, M. |
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Motor Control Sensor Feedback Circuits: Microchip Application Note Published 31-Dec-03 (app note added 2/06) |
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Motor Controller
operates Without Tachometer Feedback: 12/09/99 EDN-Design Ideas / (added 2/06) / This circuit uses a back-EMF for motor speed controlling to make a voltage controlled motor
speed controller / Speed controllers have long exploited the reverse-EMF characteristics of dc motors to control their speed. These linear driver circuits use power op amps to create a
negative resistance drive to the motor that counteracts the voltage drop in the motor's series resistance (Reference 1). The circuit in Figure 1 shows an implementation of this type of speed
control using a PWM drive, which reduces power dissipation in the drive circuitry.... |
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Motor Controller uses fleapower: 09/25/03 EDN Design Ideas / (added 1/05) A simple, permanent-magnet dc motor is an essential element in a variety of products, such
as toys, servo mechanisms, valve actuators, robots, and automotive electronics. In many of these applications, the motor must rotate in a given direction until the mechanism reaches the end of
travel, at which point the motor must automatically stop.... |
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Motor
driver - 74*245-based : A simple, time-honored approach is to use one or more 74*245 chips (normally 74AC245 is used for maximum current capability) to provide motor drive
current. Here, each channel of drive power is provided by one or more buffer on chip. (added 1/07) |
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Motor Speed Control: allows you to control the speed of an AC motor, for example an electric drill, designed for115-Volt AC
(added 5/02) |
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Motor speed Controllers: (electronic circuit added 4/05) |
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Motor Speed Regulator: This circuit regulates the speed of a small drill motor I use for PC board work. It is much handier for delicate work than a larger AC powered tool. The tool I
have came with a useless 9 volt AC adapter. The motor would whine at high RPMs unloaded, but would slow to a crawl when loaded. This circuit solves the problem.
Designed by Andrew R. Morris (added 09/05) |
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No-Hum Fan Controller: (diagram added 2/07) |
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Noise Filtering and the ADT7461: AN-699 Analog Devices Application Note (app note added 2/06) |
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NuStepper: Uses just a single IC ('though not one you're likely to have in your "parts box") to give you reversible motor
drive (added 11/05) |
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One component stepper motor Driver: (electronic circuit added 4/05) |
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OptoCoupled Gate Detects Motor Operation: 02/02/98 EDN-Design Ideas / (added 3/03) |
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Opto-coupled
Servo Actuator: (Schematic / Circuit added 1/07) |
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OptoElectronic position Control simplifies motor movements: 04/29/04 EDN Design Ideas / (added 1/05) The optoelectronic technique for achieving position control
provides an inexpensive, easy to-design method of achieving simple, repeatable movement using fixed index points with linear or rotary-motion components. The simple, basic design in Figure 1
for sequential position control exploits the quick response time of a power op amp, working in tandem with a pair of photodiodes.... |
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PC-Based DC Motor Speed Controller: (electronic circuit added 4/05) |
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PIC Based Motor Controller: (circuit / schematic added 2/03) |
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Position detectors
provide motor control logic: 05/24/01 EDN-Design Ideas / (added 2/06) |
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Power Chopper
1: (Schematic added 11/06) |
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Programmable source powers dc micromotors: 03/01/01 EDN-Design Ideas / (added 2/06) A simple, economic, compact, and tricky way of using the LM723 as a programmable voltage source to
drive dc micromotors which can set the output to a value of200 mV to 6V |
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Programming the Automatic Fan Speed Control Loop: AN-613 Analog Devices Application Note (app note added 2/06) |
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Pulse Width Modulation DC Motor Control: controls the motor speed by driving the motor with short pulses (added 5/02) |
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Push Button Motor Control Circuits: (diagram added 2/07) |
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PWM
Controller Drives LEDs from high Voltage lines: 03/04/04 EDN Design Ideas / (added 1/05) Powering LEDs from a wide dc range—say, 30 to 380V—without wasting a lot of
power in the regulating block, is a difficult task when the LED current needs to be constant. Dedicated LED drivers are available, but they usually implement boost structures and are thus
inadequate for high-voltage inputs.... |
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PWM
Controller: 555 Timer based PWM motor control project for electric fan or other DC motor (added 5/02) |
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PWM DC
motor Control with SG3525: (electronic circuit added 4/05) |
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PWM DC
Motor Speed Control: (electronic schematic / circuit added 4/02) |
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PWM motor Controller: (electronic circuit added 4/05) |
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PWM
Motor Speed Controller/DC Light Dimmer: (electronic circuit added 4/05) |
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PWM
Motor/Light Controller Variations: diagrams are for12V operation and there are high side (common ground) and low side (common +12V) versions (added 5/02) |
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PWM Speed
Control: includes theory and some example circuits (added 5/02) |
