An electrical actuator converting electrical energy into rotational motion.
0
votes
1answer
14 views
How to Control SM1 Inverter Drive Frequency with Arduino?
I am back at trying to control the frequency of an SM1 AC inverter drive due to the fact that I never got it going the first time. However, this time I would like to use an Arduino. The manual for the ...
2
votes
3answers
66 views
Substitute a MOSFET in a motor controller
I'm trying to build a CoffeeBot from MAKE magazine, and I had a question about one of the components. The circuit is pretty simple; it uses an Arduino to control a gear motor via a MOSFET transistor. ...
4
votes
4answers
72 views
What are the factors that significantly affect the life span of a DC motor?
I'm currently planning to run a DC motor continuously on solar power. So I would like to know which things I should be very careful about for optimum lifespan of the motor. I found the following two, ...
1
vote
1answer
80 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 ...
0
votes
0answers
50 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
40 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 ...
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
38 views
SEM Permanent Magnet DC Motor DPM 30R4 1500RPM 24VDC Output: 0-25kW & Brake
I am in the plannning stages of a project to build a pig rotiessiere. I have the above mentioned motor, but I am unsure of what type of power source is needed to run the motor and what can I do to ...
2
votes
3answers
77 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 ...
2
votes
1answer
76 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 ...
1
vote
1answer
85 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 ...
1
vote
2answers
63 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. ...
0
votes
2answers
84 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 ...
2
votes
1answer
80 views
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 ...
2
votes
3answers
179 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 ...
1
vote
0answers
111 views
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 ...
17
votes
6answers
33k views
What is a “digital” motor?
Dyson keep going on about their new "digital" motor. What is a digital motor? How can a motor be digital, it is inherently analog? Is it just marketing doublespeak?
0
votes
2answers
175 views
How to choose a PIC for a BLDC Motor Controller?
I just made a BLDC motor controller, but I'd like it to be able to go to higher frequencies (have less dead time, faster firmware, etc). In particular, I'm aiming for 20kHz-to-50kHz range, but am ...
0
votes
1answer
45 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 ...
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 ...
1
vote
1answer
179 views
BLDC motor how to identify
How to identify whether given motor is permanent magnet AC ie sinusoidal back emf or permanent magnet trapezoidal back emf motor. I am confused as motor I am having seems sinusoidal back emf and ...
1
vote
0answers
33 views
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 ...
-2
votes
1answer
66 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 ...
3
votes
1answer
88 views
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
5
votes
3answers
203 views
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 ...
1
vote
1answer
72 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 ...
0
votes
1answer
65 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 ...
1
vote
2answers
72 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 ...
3
votes
3answers
408 views
What is the slip factor for an induction generator in an island network?
Most textbooks covering induction machines cover only the motor use-case scenario. When the machine is used as a motor, the slip factor is determined by the frequency of the stator current by the ...
1
vote
1answer
42 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 ...
2
votes
4answers
226 views
Sounds or music into a DC fan?
Perhaps my understanding of how magnets work is off, but would it possible to play some waveforms into the positive and negative leads of a DC fan (think motherboard fan) and get a coherent sound? I ...
4
votes
1answer
146 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
votes
1answer
49 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 ...
0
votes
2answers
82 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 ...
2
votes
1answer
1k views
What power motor should be used to power a Segway-like device
I am planning on building a personal transportation device which will either be a skateboard with a motor etc or a Segway-like device.
I will have two wheels and must be capable of getting me to move ...
0
votes
1answer
483 views
How to use a SN75441 h-bridge in conjunction with an arduino
I am trying to use a SN75441 h-bridge in conjunction with an arduino in order to drive a DC motor forward and backward. Let me describe the setup and then the problem I am encountering.
I have an ...
-3
votes
0answers
44 views
Books of electronic components [duplicate]
I'm looking for books that involve many electronic components like contactor, relays, asynchronous motor... and it will be better if it contains some exercises concerning those elements.
5
votes
5answers
353 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 ...
-3
votes
0answers
49 views
What USB Devices exist to control motors and connect sensors? [closed]
I am planning to use a Raspberry Pi for controlling an automated toy car. I would like to know what USB devices exist that have several slots for connecting motors and sensors. My plan is to connect ...
3
votes
3answers
784 views
Using electric motor to adjust blinds?
So I'm trying to do some insane home DIY with my room blinds. I'm trying to make them adjust (go up and down) automatically.
Now for this, obviously, I will need a motor.
The blinds I'm working ...
1
vote
1answer
44 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 ...
2
votes
0answers
60 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 ...
1
vote
4answers
179 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 ...
3
votes
0answers
78 views
Ideas for actuation/actuators besides motors
I have a 1 cm piece of standard rubber tubing with a 1 mm hole at exactly one point along the surface of the tube.
Probably doesn't warrant a picture but just for clarity:
I would like to ...
-1
votes
1answer
48 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 ...
1
vote
1answer
67 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 ...
1
vote
1answer
52 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 ...
0
votes
1answer
31 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 ...
7
votes
2answers
1k views
Can Arduino Mega handle 6 motors independently
I wonder if anyone can help me
I am modifying an ROV and thinking of using Arduino Mega
I am new to electronics and robotics and wonder if the Arduino Mega can control 6 DC motors independently as ...
1
vote
2answers
256 views
how to add a motor to a potentiometer?
I have an old piece of analog gear from the 70s and I want to motorize the variable resistors on its panel. I don't want to replace the existing pots with motorized ones but rather to add a motor to ...
