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Questions tagged [motor]

An electrical actuator that converts electrical energy into rotational motion or sustained linear motion (linear motor). There are many types of electric motors. If the specific type of motor is known, it is helpful to use or add a more specific tag, such as dc-motor, brushless-dc motor or induction-motor.

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1answer
1k views

What type of stepper motor should I use in my project and how do I control them?

I'm building a video camera pan and tilt head. Here's what I'm getting at: I'll need one motor to control the horizontal rotation of the camera, and one for the vertical. The horizontal motor shouldn'...
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1answer
1k views

Control old printer motor with position ring

I purchased two old printers at a garage sale today in hopes of dismantling them and playing around with some stepper motors. After tearing both of them apart I discovered that there are no stepper ...
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4answers
456 views

Slowly turn a planisphere at the sidereal rate

My problem is to rotate a planisphere (a star chart) at the sidereal rate. I will set the planisphere to its initial position manually, then turn on some device which rotates the planisphere on its ...
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1answer
2k views

Speed control for high power DC brushed motor

I am going to drive and bi-directionally control the speed of some 12V/24V, 100W to 300W DC brushed motors. I have some experience in controlling small DC motors (6V/9V/12V, 0.5A to 2A) with PWM ...
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2answers
2k views

simple h-bridge polarity reversal

I am trying to reverse the polarity on a rather beefy motor (5 amp, 60v) in the most simple way possible. I need to build an h-bridge just to reverse the current, I am controlling speed elsewhere. ...
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1answer
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How to connect a pulled motor from a printer to Breadboard and control with raspberry pi? [closed]

I managed to salvage a couple of motors from a worn down old printer, and I'm unsure of how to get about connecting it to a breadboard and then to a Raspberry Pi. I've got a cobbler kit for my Pi that ...
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2answers
2k views

Battery powering an unknown DC motor

I know nothing about motors. I have DC motor (sealed in a casing) that uses 6v/12v 1a (mains switching power supply) with 2.1x5.5mm DC connector. It has variable speed controller, reversible direction,...
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0answers
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L298N shield gives relatively low ouput voltage and current

I am using a L298N shield together with an Arduino to drive a 42mm 2 phases bipolar stepper motor. The driving voltage for the motor is 12V and the logic voltage for Arduino and the L298N shield is 5V....
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1answer
826 views

Motor Driver, increase output voltage

I have a sabertooth motor controller and it is rated max 33v input. I need (at max) almost double that on the output. Can I hook up one of these to the output port, between the sabertooth and the ...
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0answers
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Why do my outputs look exactly the same for the Allegro 3901?

I am trying to capture results shown in Figure 8 of Allegro 3901 data sheet . My circuit looks like this: The channels above coresspond to the oscilloscope screen captures below: In the image ...
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1answer
2k views

Should all SATA HDDs spin up without SATA cable? [closed]

I've got a Western Digital WD3200AAJS HDD and am trying to spin it up (I don't really need it as an HDD, I need just its motor to work). After connecting the power cord it didn't spin up, so I am in ...
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1answer
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What is the function of a capacitor in a motor circuit?

I read a manual of how to connect a speed controller to a motor. I see there is a capacitor as shown below. My question is what the function of the capacitor is? Thanks
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3answers
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op-amp vs direct control

I'm experimenting with small motors (just building useless toys so far) and I'm wondering what benefit there would be to using an op-amp to control a motor (top circuit) vs just controlling the motor ...
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1answer
453 views

Interactive Art with Wooden Mirrors - How are the pixels controlled?

http://www.youtube.com/watch?v=BZysu9QcceM This video shows a mirror made up of moving wooden pieces. Please have a look. He achieves different intensity levels by motion of the wooden pieces and ...
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2answers
1k views

Correct AMPS & volts for DC motor controller

I'm definitely an amateur hobbyist, but I need to fix something for a friend. I have a existing DC motor and the controller is shot. The motor is rated at 0-90 VDC (5Amps) I wanted to see if this ...
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1answer
236 views

PWM npn sinking signal

I have a stepper motor(with STR2 Step Motor Drive) which needs npn sinking signal to operate. dsPIC33EP512mu810 is capable of generating high resolution pwm. However, the PWM signal can only turn on a ...
4
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1answer
3k views

Reversing direction of a 115v ac motor using Arduino

I have a 115V brushed motor that I am controlling via Arduino. The manufacturer says it draws 1A but I'm not sure if that accounts for the initial current draw to turn it on. I've had great ease and ...
2
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1answer
1k views

L293D Brake Doesn't Work (LB1836M good alternative)?

I have a microcontroller that is supposed to drive three motors (only one needs to be driven at the time). I tried doing this with two L293D's but there's a problem with braking. The problem is that ...
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2answers
178 views

Motor not working via transistor

I have a very simple circuit as follows simulate this circuit – Schematic created using CircuitLab when the motor is connected in this fashion, the netduino activates the transistor, but ...
3
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1answer
517 views

Using capacitor to maintain current flow past opening of switch

This circuit turns on the motor when something blocks the beam from the LED to the phototransistor. I want the motor to remain on for 5 seconds after the beam stops being blocked (i.e. from when the ...
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5answers
660 views

Microcontrollers - Beginner questions

How do you determine how many sensors a microcontroller can use? My understanding is you can't use C# directly on any microcontroller but you can use C# and communicate over the USB and look for a ...
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1answer
101 views

small fixable position motor to drive universal stage, possible?

I'm trying to make a universal stage, inside a cooling chamber, controlled through Arduino. So what I'm after are small as possible motors (2-3 cm with shaft) to fix on the stage's arms which will ...
3
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1answer
532 views

Matching mosfets - linear servo amplifier (AB)

I'm replacing a bunch of burnt mosfets in a linear amplifier for a brushless motor. 3 phases Each phase: 3 pairs of totem IRFP240 / IRFP9240 in parallell. (no R in series) My main concern is ...
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4answers
2k views

Can I use a 220v engine to build up a RC car?

sorry for the noob question, but I'd like to build myself a small RC car. I've found this motor in a blender, which runs at 220v. Can I power it with a lower voltage? What should I use? Thanks a ...
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3answers
7k views

AC motor Low RPM problem

I'm working on a controller for ac induction motor and it's spec is given below. I could control the speed without any trouble at higher speeds like 2000 rpm and above. I'm using TRIAC phase angle ...
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1answer
687 views

Detecting Motor Overload

I want to make a circuit to indicate an LED if a motor is drawing too much current. (when the motor is stopped for example mud got stuck around the gears) I am using 9-12 volts to power my motor, and ...
2
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1answer
244 views

Electrically Controlling A motor direction

I want to control a motor's direction electrically. When the input is a zero, I want it to go one way, and a 1, the other way. The only way I can think of this is a solenoid with a spring attached to ...
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1answer
605 views

What are fast and slow decay timings in the Allegro A3201 low voltage meter?

In the A3901 Low Voltage Meter Driver datasheet Figure 8 on pg. 10 shown below indicates what the output "IOUT 2/3-4" will look like given input "IN1/3 or IN2/4". But Figure 8 does not mention ...
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1answer
650 views

Driving a brushless DC motor (with a UC3625?)

I am trying to drive a brushless DC motor with hall effect sensors using a microcontroller and a TI UC3625 controller. Thing is, I haven't had much luck. Its a beast of a chip and I've tried wiring ...
2
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1answer
382 views

Which electro motor to use for steering a kite? (guestimation marathon)

I'm doing a pet project in which I want to fly a kite from my computer. For this to happen my plan is to build a little box hanging under the kite which includes a raspberry pi (connected to my laptop ...
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2answers
290 views

Why is this electro motor going slower?

From an old dust buster I've got this electro motor, the included battery pack and the charger: I ripped everything apart (the dust buster was broken) and the motor still works. After playing around ...
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5answers
8k views

how to automatically reverse the direction of a stopped gear motor and restart 12 hours later

The reversible gear motor needs to turn on @ 6:00 am pull a object 12 inches and shut off. Twelve hours later the gear motor needs to turn on and reverse the direction and place the object back in ...
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1answer
2k views

Soft-Starter PWM Noise

I have developed a soft-starter for a project of mine. I am using an Arduino Uno to generate PWM to an OAC-5 relay that turns on and off the voltage across my bridge rectifier. Here is a simple ...
4
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3answers
4k views

How to syncronize two motors with one pot?

I am trying to synchronize two dc motors with their own controllers. The controllers are name brand and use a 10k pot to control the speed. I have a duel 10k pot and would like to be able to "trim" ...
2
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1answer
2k views

(How) can I run a microcontroller and DC motor from the same battery?

I have a microcontroller (a PIC10F200) that I'm using to control a DC motor. It's a very simple circuit. A button is pushed and the pic sends output for certain increments of time. The thought is to ...
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1answer
1k views

Need help on speed control of single phase ac induction motor

I'm working on a project "single phase ac induction motor speed controller". The spec of the motor that im going to use is 230v,1/8hp ,8000rpm@no load I want to know whether it is possible to ...
5
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4answers
7k views

How do I reverse my electric motor?

For a pet project I am doing (trying to fly a kite using my computer) I need to move and reverse an electro motor to my liking (I took the motor from an old hand-held vacuum cleaner). I need to ...
3
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2answers
531 views

Short-cut when using SN75441 h-bridge (with an Arduino)

I'm trying to control 6 bi-directional motors using an Arduino to feed an SN75441. In order to minimise the number of wires between the two I'd like to tie the Motor Enable pins (1 & 9) to Vcc1 (...
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1answer
125 views

Setting up an IBL2403 motor driver

I received an shiny new IBL2403 the other day: IBL2403 http://www.realmotiontech.com/Images1/IBL2403.jpg However, I've been having difficultly using the EasyMotion Studio software that comes with it....
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3answers
580 views

Problem with stepper motor not landing on same spot

I had a quick question regarding a stepper motor that I'm working with. I am running the 5 pin, 5V motor via an Arduino board and using the sketches provided. I am trying to get the motor to rotate in ...
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3answers
4k views

L293D Question About Grounding

I am using the L293D to run two motors, and am controlling it via an ATmega328. I am a bit confused about how grounding works. I was following this tutorial, and searched this question a lot, but am ...
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1answer
163 views

Using Motor Encoder with M8706

I am working on extracting encoder data from a dc motor (apparently a "Pitman"). The encoder is somewhere inside the casing and the only interface it has with the outside is through a 4 pin connector ...
5
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2answers
542 views

making a dc motor sing under load

I have a battery operated toothbrush that I want to generate notes with using PWM on the motor. The microcontroller used is an Arduino for testing and am able to get a bare motor to generate tones. I ...
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2answers
2k views

15V 3A dc motor PWM frequency setting

What is a suitable frequency for 15V/3A DC motor? Is there any effect on the motor when the frequency is changing? I am confused with this until now and the Internet shows a lot of theory that ...
5
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2answers
518 views

Home Made Motor Problem

I've made a small 6V DC motor, hand would field and armature coils, and a 1/2" copper pipe commutator with copper wire 'brushes' The design came from an old book. 'Electrical Things Boys Like to Make'...
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3answers
9k views

How can I power 10 12V motors?

I am building an experiment that consists of ten either stepper or DC motors. Ideally I want to just have a switch box with one switch per motor so I can just flip the switch for motor 1 and it will ...
4
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1answer
362 views

PIC pins change state when DC motor connected

I'm new to PIC programming, and having trouble getting getting it control a DC motor. It's a PIC18F25K22, and a TI L293D driver. Power is suppliued by a 5V linear regulator connected to a desktop ...
2
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2answers
2k views

Use Micro-Controller Instead of ESC

I was wondering if I could use something like microcontroller instead of an ESC. I tried finding tutorials on Google and YouTube and I couldn't find anything useful. Could you please help me? P.S. I ...
2
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1answer
624 views

Input rated current for easydriver 4.4

I am using easydriver 4.4 to control stepper motor. Easy driver takes input voltage from 7 to 30V. I fed 20V 3.0A to easydriver, but i got it burnt (easydriver)*. Is 3.0A too much for easydriver ? ...
2
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1answer
733 views

Motomama arduino motor shield issues

I loaded up the example sketch for the itead Motomama on my Arduino Mega ADK and I see the green led's in the middle of the board slowly going on and off as expected from the sketch. The problem is, ...