An electrical actuator converting electrical energy into rotational motion.

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2
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0answers
99 views

Controlling a treadmill motor

I'm recycling some spare parts of an old treadmill for a new project. I have the motor with its driver board, the elevator piston and the controller board. All works out of the box, but I need to ...
1
vote
2answers
149 views

Why is this capacitor hooked up to a 9volt electric motor?

I took apart a sharper image personal fan run by a 9volt battery. I understand a resistor is sometimes necessary, such as when preventing light emitting diodes from burning out. How about a 9volt ...
-1
votes
2answers
128 views

Increase power output of squirrel cage induction motor

I have a squirrel cage induction motor rated at 15 kW, 415 V 50 Hz, 1460 rpm. I want to increase its power above 20 kW. I am going to rewind the same motor for 3000 rpm, at 250 Hz supply frequency, ...
2
votes
3answers
454 views

Why is PWM used to control DC motor speed instead of using a variable resistance?

My question is at the end (to change the speed) we are controlling the input voltage of a DC motor in both PWM (pulse width modulation) and variable resistance cases. Is the only reason for choosing ...
2
votes
0answers
66 views

Gear motor with encoder: minimum drivable step

I am fancying this motor http://www.pololu.com/catalog/product/2271/specs to motorize an X-Y stage. (Alternative High rpm motors with high reduction ratio and high encoder counts/rev are welcome ;) ...
0
votes
1answer
148 views

Which controller board is best for hooking up rasberry pi to Traxxas 5675 Titan 77? [closed]

Can I hook this motor up to my rasberry pi?: http://www.amazon.com/Traxxas-7075-Titan-Brushless-Motor/dp/B0027GGZYU/ref=pd_sbs_t_4 How about this one? ...
1
vote
2answers
187 views

How fast we can change direction of rotation of a stepper motor

I want to do the following of a stepper motor with following characteristics which has 100 RPM change DOR(direction of rotation) every alternative rotation in the opposite direction control the ...
1
vote
1answer
141 views

Upgrade a cordless screwdriver (16.8 V) to Li-Poly [closed]

I'd like to upgrade my cordless screwdriver/drill to use lithium polymer batteries. Problem is, the screwdriver uses 16.8 V at the moment (14 NiMh 1.2 V cells). So, using lithium polymer batteries ...
1
vote
4answers
135 views

Increasing voltage to motors

I'm got a RC car, which can go forward and backward and it's supplied by ~5V battery. At this moment the circuit looks like this: and the board can swap ...
4
votes
4answers
226 views

Control torque of 3-phase AC motors

Actually, we have 1x30HP, 2x10HP motors working at our workplace. When we start the motors there is a lot of torque generated due to which our grid supply charges us penalty every month. We need ...
0
votes
1answer
120 views

Small Vibrating Motor at Set Intervals

I am looking to create a simple circuit that utilizes a very small vibrating motor such as the one here: http://www.adafruit.com/products/1201#Distributors. I would like the small motor to be powered ...
5
votes
2answers
155 views

Automatic swinger from spare CD drive

An idea that comes to my mind to swing a baby swing automatically is using a CD drive eject - close function , I have several such drives I dont use and I dont want to use a computer to do the ...
0
votes
2answers
88 views

Solteam switch with 5 pins

I am very new to electronics, learning by my own. I extracted a lot of switches, buttons and other components from old computer parts, and now I am wondering can I use this as direction switch for ...
0
votes
0answers
62 views

Capacitor motor vs. three phase motor

I successfully converted a small (~15W) capacitor driven one phase synchronous motor to a three phase motor by removing the capacitor and connecting the two windings to a three phase motor frequency ...
1
vote
1answer
50 views

DC gearhead motor broken - too much heat on terminals while soldering?

I am building a line-following robot using two of these motors: Motors I had everything on the breadboard and it worked fine - including both motors. Then I built the circuit, soldered wires to the ...
1
vote
2answers
273 views

High Current DC Motor Driver

I have seen this datasheet of high current DC motor Driver. Its mentioned that it can be used to drive the motor in forward or reverse direction. I puzzled by seeing only 2 X IR7843 MOSFET's are being ...
3
votes
3answers
727 views

Limiting current for a DC motor

I've been searching around the internet on and off now for over a month and now, and I fear my question is so basic that I can't find an answer. Or I've seen the answer and just recognize it. All I ...
1
vote
3answers
134 views

555 Timer Triggering Too Easily

I've got a 555 timer being powered by a 5v rail that is isolated from the 3v rail running a motor driver, which runs a motor. The 555 is only supposed to fire when it gets the signal from a 38khz ...
2
votes
1answer
167 views

H-Bridge motor with Arduino

I'm pretty new in electronic stuffs and I'm still not sure what I'm doing, so my questions might seems retarded. I recently got an Arduino and I'm trying to build a mini-car with it, but I would like ...
1
vote
0answers
161 views

Analogue Hall sensored brushless outrunner motor position control

I would like to produce a low cost high power:weight servo drive using a brushless outrunner motor, like those use in radio control planes: Some of these motors leak enough magnetic flux out the ...
2
votes
2answers
208 views

Calculator Printer Control (how to drive Epson dot matrix printer)

I have small dot matrix printing device that I'm trying to control (i.e. print to) with a Parallax Propeller board. (See images below.) It's the printer from this: ...
0
votes
1answer
268 views

wiring a blender motor

So I've salvaged a motor from a blender that was not in use- the only thing is I haven't got a clue how I would wire it. I want to make sure I have the correct setup, since it operates at 230V. So my ...
4
votes
2answers
193 views

Can someone tell me what these two lines of Arduino code do?

I'm trying to get into robotics, and I've found some tutorial code that was readily available on pololu's website for one of their motor controllers which I now own. Could someone with some background ...
4
votes
2answers
588 views

Trouble on switching a 3V relay with Arduino digital pins

I am using the Arduino Ethernet with POE and I am in trouble when I have to enable my relay by using a digital pin. What I would like to make is to start a motor by using a relay, which relay is ...
2
votes
1answer
166 views

How to interpret diode-mode readings from a multimeter

I'm using this multimeter to examine a heat gun fan. The fan has four contacts placed in a circle (well in a square inside a circle). Two opposite each other are labeled ...
0
votes
2answers
304 views

How to fix servo motor broken by wrong polarity [closed]

I accidentally plugged in my servo with the wrong polarity (with the order of wires being signal, ground and power). It immediately started releasing the 'magic smoke', but I managed to unplug it ...
2
votes
2answers
583 views

I need help designing a speed control dc motor circuit

We were asked to design a motor speed control circuit using A 15V Source -> Potentiometer ->LPF-> Op-Amp -> ADC ->DAC ->Op-Amp-> Motor Driver -> 3V DC Motor (because of its low cost) I am going to ...
0
votes
0answers
85 views

Frequency Inverter LS IS5

I have been working with a IS5 frequency inverter. I'm trying to use the Sensorless Torque control, for a Wind Turbine Emulator, via an external reference. The issue is, when I turn the inverter on ...
3
votes
2answers
295 views

Why did the designer use this motor?

I was taking apart this thing that I bought from the dollar store, its this glass block with an encased sculpture that sits on a revolving deck. (see photo below) The deck powers 4 LEDS with ...
0
votes
2answers
104 views

Should I supply a motor with the same current of its stall speed?

I have a DC motor that has a stall speed current of 6 amps. Does that mean I should be supplying a constant current of 6 amps even when the motor is not experiencing a need for that much current?
2
votes
2answers
2k views

Build an H-Bridge Motor Driver with 4 N-Channel MOSFET

I have bought 4 N-Channel MOSFETs to build an H-Bridge Motor Driver. My Motor drive and my power supply voltage is 12v. My TTL logic voltage is 5v as I want to speed up/down the motor with uC PWM. Now ...
2
votes
2answers
145 views

Motor activation using MOSFET

I need to switch a motor on and off by cutting it's battery connection and even though I could use a relay, I would rather to use a MOSFET, so things will be smaller and quieter. The problem is, I am ...
4
votes
1answer
185 views

How do two DC motors of the same power but for different voltages differ in size?

Suppose I have two brushed DC motors, each rated 3000 RPM and 50 watts. One is rated for 18 volts and the other for 36 volts. How will their sizes differ? I assume that because of higher voltage the ...
8
votes
2answers
1k views

Difference between Brushless Motor and Stepper Motor

I think I understand the operating principles of a brushless motor and a stepper motor, but I'm a little confused about the difference. Is a brushless DC motor a very basic stepper motor? With ...
1
vote
1answer
174 views

How to identify stepper motors?

I have a bunch of motors that I collected from different places. How can I figure out which ones are stepper motors? I have access to the datasheet for most of them, just not sure what to look for. ...
3
votes
3answers
652 views

DC Motor - PWM vs Voltage

When controlling a DC motor that is rated at 5V theoretically I can drive the motor in these ways: 5V with 100% duty cycle PWM. 10V with 50% duty cycle PWM. 20V with 25% duty cycle PWM. Is there a ...
6
votes
2answers
527 views

Why would DC motors be preferred over brushless AC induction motors for cable cars propulsion?

According to this article San Francisco cable cars system uses a set of traction cables driven at constant speed and each car can connect to the cable when its operator want the car to move and ...
3
votes
1answer
59 views

circuit breaker for 1/4 HP 115V AC motor?

I'm building a machine to help me manufacture some optical components more quickly. The machine will be powered by a plain old, "boring" 1/4 HP motor, like the ones used for various household ...
4
votes
2answers
198 views

Is no-load to stall amp draw linear with DC motors?

I have two DC motors with no-load current draw of 200mA. The datasheet goes on include a stall-current draw of 2.2A. The torque is given for both extremes. Considering you know the torque that is ...
-3
votes
2answers
251 views

Diffrance between Brushed ESC and Brushed DC Motor Driver (Controller)

What is the diffrance between a Brushed ESC (electronic speed controller) and a Brushed DC Motor Driver (controller)? they both do the same job, yet at different prices and look diffrent. Example: ...
0
votes
1answer
434 views

to automate motor switching on and off

I want to automate my motor so that it gets automatically switched OFF when my tank reaches the full load level.So I chose a sensor to be kept at the tank's maximum position... then a MCB connected to ...
2
votes
5answers
177 views

Is a solenoid considered a DC Motor?

For our senior project we are making an electronic door lock controlled by a raspberry pi. We created a proposal which was approved for all the specs for creating the device which we have to abide by. ...
2
votes
2answers
379 views

Modify circuit to turn motor on/off multiple times per switch press

I purchased a timed air freshener kit which makes the motor spin when the switch (SW1) is pressed. I have created a schematic based on the diagram in the instructions (pdf). simulate this ...
1
vote
1answer
144 views

control four motors with Motor Driver 1A Dual TB6612FNG

I know I can control 2 brushed DC motors bidrectionally with the Motor Driver 1A Dual TB6612FNG, but can I somehow control 4 brushed DC motors with the Motor Driver 1A Dual TB6612FNG, NOT ...
4
votes
2answers
462 views

1 Regulator for 4 motors or 4 regulators?, connecting 3-5V dc motor to arduino

I have a 2S Li-Po battery (7.4v) and I want to control 4 small dc motors (3-5V, site says 22mA at 3V) with an arduino nano PWM signal. The nano is also powered by that battery, i do not want another ...
2
votes
2answers
255 views

Electric engine power over RPM

I have started to research about electrical motors and batteries. I have learned physics in high school and I understand electricity. My question is whether an engine's power depends on its RPM or ...
0
votes
1answer
370 views

24V H-Bridge DC motor, why voltage drop to 3v if motor connected

I want to drive a DC motor using L298N H-Bridge Driver IC. I'm using the schematic from this website: The motor is 24 V with about 7.5 ohm impedance (thus, it draws about 3.2 A). I'm using 24V ...
6
votes
2answers
231 views

Why did my laser die?

I recently hooked up a cheap laser module to a mircrocontroller (via a MOSFET), mounted on top of a couple servos. simulate this circuit – Schematic created using CircuitLab This worked ...
1
vote
4answers
496 views

Transistor circuit to toggle motor on/off not working (Arduino)

I've been trying to create a simple transistor circuit with a 2N3904 that will toggle a geared DC motor on and off without drawing power from the arduino - I've followed the schematic seen in the 2nd ...
3
votes
2answers
117 views

motor feedback system for linear motion

What is the best way to detect the position / displacement of a linear motor ( solenoid type ) for feedback ? I was thinking of using a hall effect sensor or an Infrared sensor .