A common actuator in robotics; it's usually made of a static magnet (stator) and a set of moving inductors, acting as electromagnets, connected to the circuit through brushes. Brushless motors use phased clocks with electronic circuitry to generate motion.
-1
votes
3answers
83 views
How to turn DC motor to specified angle
We have bought 2WD turtle bot with Arduino.
http://www.dfrobot.com/index.php?route=product/product&product_id=65#.UZxObIoW3RQ
Now we need to turn it to 90 angle.
We need to understand how we can ...
5
votes
1answer
66 views
DC Motor Overvoltage Operation
I am new to PWM control. Is it advisable to operate a motor at higher than rated voltage with the "PWM average voltage" more than the nominal voltage specified in the datasheets? After some ...
0
votes
0answers
49 views
Choosing the correct brake resistor for DC motor
I have a DC motor running on 24VDC rated 150W (~6,25A), how do I calculate the correct brake resistance?
2
votes
1answer
74 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 ...
1
vote
0answers
59 views
How can I use arduino to control 4 motors speed and direction?
I consider this question different from others because of the variety of things I need this setup to be able to do.
Description:
I want to build a minimalistic motor controller capable of controlling ...
1
vote
4answers
146 views
which RPM measurement method is suitable?
I have a PMDC motor which is electronically controlled for speed. And it is a closed loop system. A proximity sensor is there to measure the speed of the motor and there are 12 bolts attached to the ...
0
votes
1answer
47 views
PWM Motor Speed Control
I recently bought one of these:
When i hooked it up to my 24v power supply and a voltmeter, it was either 0 or 24v with the POT. Nowhere in between. Why is this? Is it becasue this is a PWM device ...
3
votes
3answers
133 views
How can I safely power two 3v motors from a 9v battery?
I'm making a Sumo Bot from scratch and I had purchased two 1.5-3v DC motors from Radio Shack to run with my Arduino Uno v3. I'm using a 9v battery to power my Arduino alongside an RF receiver, Quad ...
1
vote
3answers
101 views
Any DC-powered, low flow-rate, inexpensive water pumps?
Looking for small water pump, which can pump up water from a container, kept at ground-level to another container, placed 10 feet above ground. It should ideally be DC powered, and be able to transfer ...
3
votes
4answers
109 views
Is this arduino motor driving circuit correct?
I got an Arduino Pro Micro and some parts to play with. I want to control a little 5v motor from an external power supply by using the Arduino to trigger a transistor. Like this:
Is that at all ...
-5
votes
0answers
43 views
Voltage overload in circuit [closed]
I'm using the circuit as shown for controlling and reversing my DC motor. When I connect my motor to the CRO, it shows a warning of 'Voltage load'. How do I solve this problem?
2
votes
1answer
51 views
How does ripples in dc affect working of a dc motor?
In the circuit provided here ,the supply voltage to the motor(+24 V ) is not a steady dc . It is the output of a full wave rectifier. how does it affect the working of a dc motor.?
3
votes
1answer
172 views
Criteria behind selecting pwm frequency for speed control of a dc motor?
I'm working on a speed control circuit for a brushed dc motor (24v, 500rpm, 2A, 4kgcm).
The main components that I plan to use are PIC16f873, 4n25 optocoupler, IRFZ44N MOSFET, BY 500 - 800 diode(for ...
1
vote
1answer
132 views
Design Considerations for a dc motor drive circuit?
I'm planning to develop a control circuit for a 24V, 500 RPM (@no load), 2A, 4 kg-cm brushed DC motor. Motor has to run only in one direction. I plan to use IRF44ZN MOSFET with a proper driver to ...
4
votes
3answers
158 views
Driving Permanent Magnet DC Motor via PWM
SUMMARY:
I am currently trying to finish up a DIY project I've been working on for a while: Building an electric potters wheel. I acquired a treadmill and salvaged quite a few good parts from it, and ...
1
vote
0answers
38 views
Parallel, low noise motor driver design with L293D [duplicate]
I'm designing a very basic motor driver circuit for 12V DC brushed motors to be connected with my microcontroller. The motor needs to be driven in forward and reverse
My objective is to do that with ...
1
vote
1answer
85 views
Arduino motor shield running 2 12V 60 RPM DC motor
I'm trying to run a bot with a differential drive system and I'm using 2 12V 60RPM DC Motor and an Arduino shield along with the Arduino, along with that I'm also having an wheel position encoder ...
1
vote
1answer
99 views
Can a phone battery be used to power Arduino or Motors
I was wondering whether it would be possible to use a rechargeable battery from an ordinary cell phone to power some electronics such as a motor shield for Arduino?
Can that be done and if yes then ...
3
votes
1answer
86 views
Simple DC motor error
I had tried to make a simple homemade DC motor using 8V DC, Cu coil and a permanent magnet. But it doesn't rotate. Here are the things I did:
I made a coil with 6-7 turns using Copper wire.
...
2
votes
1answer
135 views
Using a single MOSFET to switch current direction
I am currently using a 30N06L MOSFET in order to control a DC engine from an Arduino using this circuit:
The problem is that this way I cannot change the direction of the engine.
Is there a way to ...
4
votes
1answer
99 views
Is it possible to control and reverse the direction of a dc motor through a headphone socket?
Yesterday, I found that it was possible to control a servo using a headphone socket with a fairly simple circuit.
I've got a project where I need to to control a dc motor via a headphone socket. Is ...
0
votes
1answer
261 views
Feedback for DC Motor Speed Control using PID
I'm working on a project in which I have to control the speed of a DC motor using an analog PID(using op-amps). The input will be provided with a potentiometer. The issue is that I can't figure out ...
1
vote
1answer
55 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 ...
0
votes
2answers
57 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 ...
1
vote
3answers
254 views
How do I control a two 12VDC 10A motors using an Arduino?
I am new to arduino and electronics in general but I need some help on a project I am working on. Essentially I want to be able to control the state (on/off) and direction of two linear actuators that ...
0
votes
1answer
105 views
Arduino motor shield lacking power
I am using an Arduino uno R3 with the motor shield R3 with 1 DC motor (http://www.maplin.co.uk/small-motor-3738) pluged in by the USB port (because I dont have a proper power cable). When i first used ...
0
votes
3answers
135 views
L293D maximum current with heatsink
I saw in datasheet of L293D that maximum current per channel is 650mA. I have two dc motors that draw within that limitation. Most of the time, measured current is ...
1
vote
1answer
193 views
closed loop DC motor velocity control
I'm trying to set up a closed loop control for the velocity of a DC motor. I have a small DC motor with an 8bit encoder. I'm driving the motor using PWM off an arduino and a L298N h-bridge.
Here's ...
1
vote
2answers
189 views
Motors controlling Arduino usb question
simulate this circuit – Schematic created using CircuitLab
I made a RC car with an Arduino board, using an H-bridge to operate the motors. I connect them through a capacitor and a diode ...
1
vote
2answers
265 views
PWM Motor speed control using PIC; What mosfet to use
I have a 5V PIC16f877a controlling the speed of the motor 12V which has a power rating of 8W; the current will be around(600mA) am I correct?
The motor is basically a small water pump commonly used ...
4
votes
2answers
76 views
Considerations For Motor Cables: what are the downsides to ribbon cable?
My friend (a Mechanical Engineering student) is building machine that uses an array of motors in an application where they are under almost no load. He showed me the thin, old, ribbon cable he intends ...
5
votes
2answers
140 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 ...
3
votes
3answers
105 views
DC Brushed motor lubricant
Quick question, are the brushes in a brushed DC motor supposed to be lubricated?
1
vote
0answers
65 views
dc machine with brushes covering more than one commutator segment
i'm a bit confused with the current that flows in a wave armature winding of a dc machine. In a wave winding, there are two current paths, right? what happens when the brush covers more than one ...
1
vote
0answers
206 views
high torque and high rpm dc motors
I am making an electric 4x4 car, will it make a difference in overall speed if:
Case1: all 4 motors are high torque and relatively low rpm
Case2: 2 high torque relatively low rpm and 2 high rpm ...
0
votes
1answer
491 views
Circuit to reverse polarity
I am doing a project on a door shutter opener where there are two states or signal I pass into the circuit:
0V: Door shutter closed
5V: Door shutter opens.
I plan to accomplish this via motor ...
0
votes
1answer
119 views
what type of armature i should use in 12v dc magnetic 2 pole motor to get more than 8000Rpm
i m trying to wind a motor but i am new at this so can any one can tell me how can i wind an armature to get more than 8000 Rpm in a 2 pole magnetic motor
of 12 volts
0
votes
1answer
135 views
choosing the suitable DC motors
I'm working on a 4x4 robot that is supposed to carry stuff total_mass=100kg (including the robot).
the robot should have average speed ...
8
votes
4answers
697 views
Why use DC motors for driving elevators?
This New York Times article says that on November 14, 2007 Consolidated Edison Company was going to end supplying direct current to the remaining several buildings that used those to run elevators.
I ...
-3
votes
2answers
532 views
Replacing 6v dc motor with 12v dc motor for better speed
I have a 6v battery powered kids ride-on-toy (with 6v motor). I wanted to make it move faster so I put a 12v battery with the 6v motor which made it run better. But after a while it started moving ...
4
votes
2answers
119 views
2 different batteries in single circuit
I need to use a SN754410 motor driver with a 4.5V microchip and 12V motor all running on batteries.
I want to power the microchip with 3x1.5v AAA batteries. The motor requires 12V and I want to use a ...
1
vote
1answer
151 views
voltage divider circuit for dc motor
I would like to run a 6V dc motor using a 9v battery supply. The motor specification states that current is 150mA at 6V which I calculate to be a resistance of 40 ohms (when I measure the resistance ...
6
votes
2answers
419 views
Help with 555PWM motor control
I'm making a laser spirograph for a school project. It requires speed control of three motors. I used a simple 555 astable circuit with a pot for control, then the output goes into the base of a power ...
3
votes
3answers
213 views
Calculate power supply on distance
I need to provide 12V DC to a DC brushless motors that need 12V 30A at distance of 30m from the source.
The cables I can us are 20 Gauge, I know that the cables are loosing power, how can I ...
0
votes
2answers
109 views
Calculate current load for 8 motors
I have 8 DC brushless motors that are connected parallel to a DC source.
According to the motor manufacture each motor powered with a 12V DC and need 11A.
How can I calculate the the current load of ...
3
votes
1answer
198 views
H-bridge output voltage
This my first electronics project and it is based on this project.
I'm using a TI SN754410NE H-Bridge to control 2 small dc motors. I'm using an Arduino UNO for the control signals (USB powered) and ...
0
votes
2answers
137 views
DC Motor control
I am using a DC 24v scrapped photocopier motor for a table fan.
To save energy, it's ON for 2 seconds and OFF for 3 seconds using MCU.
The fan keeps rotating during the power off state.
Is this a ...
7
votes
3answers
375 views
Can a DC motor with obstructed movement be damaged?
I am trying to build shades, which should roll up or down, controlled by a DC motor. This motor can only be turned on or off (1/0 to turn it on/off). Also, it should be noted that the microcontroller ...
2
votes
2answers
271 views
Regenerative Braking circuit
I am reading this great website.
I don't understand the topic #4.
I don't see how the current will flow back to the battery, and how the Q2 enabling changes the circuit. As far as I can see, the ...
2
votes
2answers
496 views
What is the formula for working out the volts, amps and watts of a DC Motor?
Can anyone remind of the correct way of working out the volts amps and watts on a DC motor?
I know it is something like:
\$ V=I \times R \$
\$ I=\dfrac{V}{R} \$
\$ W=\dfrac{V}{I} \$
or something ...
