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.

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53 views

DC 5 Volts - 2100mAh Electric Motor Generator. How?

I have spent my entire weekend trying to locate a place where I can buy a 5 Volts - 2100mAh Electric Motor/Generator. My goal is to spin this motor up to a certain RPM to generate the 5 volts and ...
0
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1answer
53 views

Adding a potentiometer to a motor circuit to control speed

How can I add a potentiometer to control the speed of this motor in this circuit? It is a 3-12V DC Motor 2RPM max. I am unsure as to what kind of Potentiometer to use, or how to include it into this ...
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3answers
59 views

Circuit for a DC motor with 2 microswitches reversing direction

So here is what I am trying to do... have a DC motor wired to an on/off switch and 2 microswitches. Each switch will reverse the direction of the motor, so one switch tells the motor to go forward, ...
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vote
1answer
46 views

Using p-channel mosfet on high side of h-bridge, do I really need a driver chip?

I know there are fancy h-bridge ic's to drive high side of h-bridge but I guess that is when I have to drive n channel mosfet. I am planning on using p channel mosfets on high side and n channel ...
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3answers
78 views

Motor Discharges Boost Converter Too Quickly

I am trying to step 3V up to 9V via a boost converter, the idea being I have the current but not the voltage to drive a DC motor. I used this this website to calculate the parts values I would need, ...
6
votes
2answers
132 views

Wind turbine generator: brushed or brushless DC motor?

I am trying to use a DC motor as a generator for a wind turbine but then there are two possibilities for the DC motor which are brushed and brushless. Which one is more efficient to use? I know that ...
0
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1answer
32 views

Radio Control DC Motor With Potentiometer

I am looking to control a 12V 16A 180RPM DC motor. The package I am purchasing includes this motor, and a speed controller. Please see this link for the exact detils. The speed controller comes with ...
0
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1answer
46 views

How does a CD-ROM rotor know when to stop the moving plate?

I need to make a mechanism with a RaspberryPi like in CD-ROMs, so I can easily move a plate from the minimum position (CD-Rom closed) to maximum (CD-ROM open). I have a DC motor (from CD-ROM) and I ...
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1answer
29 views

Wireless DC Motor Speed Control

I am looking at purchasing this 24V 110RPM 1amp DC motor with a speed controller like this one that the listing recommends. I have been doing some research into controlling linear actuators via ...
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2answers
67 views

Can i use a power supply that supply slightly higher current than the rated current from my dc motor? [duplicate]

I got a 12v ,0.9A dc motor.Currently i got two 12v dc supply which borrowed from my friend.The current of the 2 dc supply is 1.0A and 0.5A. Is it safe for me to use the higher current supply from 12v ...
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1answer
39 views

Wireless DC Motor & Linear Actuator Control

These are the 2 items that I have: 24V 110RPM 1Amp DC Motor. 24V 100mm Linear Actuator. First Question: To run the DC Motor I am thinking of getting this 24V 2A power supply in the hope that both ...
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1answer
52 views

High-current monitoring circuit

I have the following circuitry: Battery Supply => Current Monitoring Circuitry => DC Motors Battery Supply: 4AA NiMH batteries - 4*1.2V (1.5mAh * 4) Current Monitoring Circuitry: Max 4378 chip ...
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2answers
123 views

Can I use 12V voltage regulator and a variable 0 to 30V DC power supply to control my 12V DC motor speed?

I've got a 12V DC motor with: Output power: 3.4 watts Rated speed : 170 RPM Rated current: 0.9A Currently I have a variable voltage DC power supply which can vary the voltage from the DC power ...
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0answers
42 views

Arduino Motor Shield R3 ignores external power source

Fairly new to Arduino, but I've set up a slot car racing track with an Arduino Uno R3 and an Arduino Motor Shield R3. I've used this tutorial: ...
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0answers
35 views

Drawing proportional current from two voltage sources?

I have two voltage sources, a microcontroller, and a motor. I want to get the current for the motor from these two voltage sources at a proportion of my choosing using the microcontroller, so for ...
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vote
3answers
50 views

Voltage regulator for DC motor

I'm trying to regulate the voltage of 9 volts battery to DC motor but didn't work. This is my scheme: The original scheme is for led and just wondering why it didn't work for DC motor. Here is the ...
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vote
3answers
73 views

Will running a DC motor below stall current damage it?

We have DC motors that power wheels on a car. Because of internal friction, the motors will not actually rotate until they are given 50%+ power. However, they do make some neat noises within this ...
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votes
3answers
493 views

What determines how much current can flow through a 2N2222 A?

I've been fiddling around with a brushed DC motor, a 2N2222 and an arduino's PWM to get different speeds out of my motor. Now, based on a video tutorial I watched on youtube, It was recommended to put ...
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1answer
35 views

Powering an iComSat GSM Shield and a Gear Motor with LiPo Battery

I have an iComSat GSM Arduino Shield (based on the sim900) and a gear motor that I am planning on using with a Teensy 3.1 microcontroller. I'd like to power the whole rig using a 2000mAh LiPo Battery ...
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vote
1answer
59 views

how to drive two pairs of DC motors with arduino

I want to power four independent DC motors of a rover with arduino. Besides the voltage (6.0V) I don't have any other information about the motors. I decided to make the rover change direction like a ...
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votes
0answers
72 views

How to control wheelchair motor?

I am trying to make motorized wheelchair and I have two 24V wheelchair motors, but I don't know the connection diagram of motor. There are four wires coming out from the motor,two for the power and I ...
0
votes
1answer
86 views

Serial monitor controls Arduino Motor Shield; why Bluetooth didn't do?

I have got Arduino Mega 2560, Ladyada Motor Shield v1.0, HC-07 Bluetooth Module, and Android Bluetooth Terminal App. I combined Motor Shield on Arduino Mega. I get M+(5V)/GND point to run my HC-07 ...
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0answers
23 views

Multiple motor shield connection?

I'm working with a 4-motor Arduino shield, and it looks like they can't be connected together since they are not Adafruit. I need to know if it's possible to define the pin breakdown for each shield ...
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vote
1answer
53 views

Differential Drive for Heavy Robot

I'm asking here another question in relation to my previous one. I would like to know how would one proceed when you want to control a heavy robot with differential wheel drive. When it comes to ...
0
votes
1answer
69 views

L293D heating quickly under 0.5 A (driving a DC motor using adafruit motor shield v1)

I am using Adafruit's Motor shield to drive a DC motor I got out from an RC car... Powering the Arduino from USB. And powering the shield from a 12V / 1.5 A Power adapter (the shield is using an ...
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2answers
111 views

why dc machines have double layer winding?

why do dc machines always have double layer winding?is it possible to create a single layered winding dc machine? More generic Question: Can anyone explain the logical evolution of dc machine from ...
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1answer
53 views

H-bridge vs ESC

I'm familiarizing myself lately with the usage of ESC (Electronic speed control). I'm unable to determine when is it the best option to chose ESC over H-bridges? - in terms of advantages and ...
6
votes
3answers
554 views

Micro, MOSFET and DC motors

I'm developing a nano quadcopter using an Atmega328 microcontroller, powered at 3.3V, and very small brushed DC motors. The average current used by these motors is about 800mA @ 3.7V. Initially, to ...
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votes
1answer
106 views

Control a 3.6V motor (forward/idle/reverse) using two phototransistors facing a smartphone screen

My purpose is to build a cheap quick-and-dirty "robot" using 2 electrical screwdrivers connected to the wheels and a smartphone to control them. I want to control each motor (forward/idle/reverse) ...
0
votes
1answer
58 views

PC driven PWM for 96 Channel Motor Controller [closed]

I need to build a USB motor controller that can simultaneously manipulate speed and direction of 48 12Volt 15Amp brushed DC motors while having full support for up to 96 motors. This controller will ...
3
votes
2answers
197 views

How to control the speed of a 12V DC motor with an Arduino?

I'm trying to figure out how to control the speed of a 12V DC motor with an arduino and a 12V battery. I want to split the «power» and «control» parts of the circuit so the Arduino and sensors ...
1
vote
2answers
66 views

Supply noise due to Motor

I'm currently trying to install some IR sensors on an Arduino robot and am having issues with the sensor readings anytime the motors (2 of them) turn on. I'm using an Arduino Uno connected to an ...
1
vote
0answers
98 views

How to tell whether a motor is an AC or DC motor?

I watched a youtube video http://www.youtube.com/watch?v=hT3jJRGVdW4 The man says : by spinning the motor to see whether the output is AC or DC, then it can tell whether the motor is generating AC or ...
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votes
2answers
127 views

Controlling a DC motor speed with Arduino

I'm trying to follow this tutorial But instead of the components specified in the tutorial, I'm using the following: - RS-360SH DC Motor - BD139 Transistor - 1N4007 Diode - 220 Ohm Resistor I ...
2
votes
2answers
145 views

Arduino turning a knob left and right with Digital PWM [closed]

I am trying to find a way in order to turn an car amp's bass level knob left and right using an Arduino's digital PWM pin. I am thinking that a stepper motor would be the correct motor to use in order ...
0
votes
0answers
63 views

A4973 DC motor driver design considerations

I'm dealing with a motor driver circuit connected to a microcontroller (ATmega328). The load is a brush DC motor running at 12V nominal voltage. I need to detect when the motor is stall and for this ...
3
votes
2answers
452 views

Control 5V DC motor with Arduino

I'm trying to build a circuit to control a 5V DC motor with Arduino. My issue is that I can't understand the resistance value within this scheme: Which resistor should I use in order to make work ...
0
votes
1answer
50 views

Small DC motor current limit

I am looking at some datasheets for 5-12V DC motors. The datasheets specify the stall current is ~1.9A at 12V DC. They do not specify anything with regards to maximum safe operating current. In my ...
2
votes
3answers
129 views

DC Motor used in cordless drill - is it polarity-sensitive?

I have an old cordless drill I've stripped the motor out of. Am I correct in saying all dc motor aren't polarity sensitive? I thought that how you reverse the direction of the motor
1
vote
4answers
417 views

What is the difference between a 12V and 24V DC motor?

I was buying DC motors for making robots. I wanted to ask whether the voltage written on the motor, e.g. 12V or 24V, matters. Whether a 100 RPM 5kg/cm torque 12V DC motor is any different from a 100 ...
0
votes
1answer
76 views

Measuring rotations problem with motor encoder

I have this motor encoder mounted on the back of a 120RPM motor which has a gearing of 298:1 ratio. The back shaft is directly from the motor, not through any gears. Im using an encoder disk that has ...
1
vote
4answers
140 views

What happens when you increase current to a DC motor?

Increasing voltage increases the RPM of the motor, but what does increasing current do? I can't seem to get a straight answer. Some googling has led me to believe that torque increases while rpm ...
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vote
2answers
83 views

Power supplies and start up currents

I have a pair of motors and the datasheet says that typical peak effective current is 177mA, max rated current is 218mA, typical no load is 53mA. Now thats all fine but it also says typical start ...
0
votes
1answer
51 views

Home Built Hybrid EV Battery Charge current limiting

I have a hybrid EV that I'm working on which uses 2 48V DC motors with a maximum load of 300 Amps each, for a total maximum load of 600A. I have 2 alternators running off a gas engine generating 125 ...
0
votes
2answers
199 views

DAC to run a 555 Timer [duplicate]

I am trying to create a PWM signal using a POT from 555 Timer to control speed of a 5V DC motor. I have a development board with a C8051F020 microcontroller, a 100K POT and an LCD display. The ...
0
votes
2answers
97 views

Using a pulse-width modulated signal to possibly reverse polarity

I'm trying to help an artist control a simple DC motor using a single signal. The signal is a digital output, 0/5V, and the motor runs with max 36V. The motor needs to run forwards and backwards. ...
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votes
2answers
40 views

What is the possible reasons that cause the different motor strokes of two directions

The question may be a little too specific since it refers to some special choice of the motor parts that may not be used for everyone, yet I would like to learn about the general debug methods if ...
0
votes
2answers
154 views

Can I run this motor off of this solar panel?

I am trying to build a solar powered boat, and I have decided upon this 5V, 500mA panel. I can buy 3 or 4 of them to get up to the necessary voltage and amperage. The problem I have is that I can't ...
1
vote
1answer
73 views

DC Motor Control - h-bridge pulsing strategy?

Question is with regards to a DC motor controller built around an Allegro A4940 and four discrete FETs. There are at least four possible strategies for driving the FETs, and I'm struggling to ...
2
votes
2answers
104 views

Reduce gear box and DC motor noise

I'm working on a project where I use DC motor and gearbox to reduce the speed and get a higher torque. The problem is, when the project sit, for example on a table, the noise is amplified. (with ...