An electrical actuator converting electrical energy into rotational motion.

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2
votes
3answers
183 views

Four-contact push-button switch; what's the pictured switch called?

I have single phase submersible pump, around 400 foot underground in a Bore-well and its controlled by the controller shown below. The green button is a push-button switch which if pushed and held ...
0
votes
1answer
39 views

Why does my PWM Arduino loop not working as intended?

I have a Arduino sketch I am trying to use to control a DC motor using PWM. It seems it it just running the motor as if I the PWM was set to 255 (100%). I intend for my sketch to start the motor ...
0
votes
1answer
46 views

How do I build bracelet that vibrates at a set time? [closed]

I understand that there was a similar question asked about a bracelet that vibrated every n minutes, but this is different. I'd like to build a 'alarm-clock-bracelet' hybrid that has some sort of ...
0
votes
1answer
44 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 ...
0
votes
2answers
80 views

Can the output of two 15-amp motor drivers be hooked up in series to achieve a 30-amp tolerance?

I had a cheap 15-amp motor driver that I bought on eBay. You can see product details here. I was planning to use this motor driver to power my robot, which uses two 24v wheelchair motors. Then I ...
0
votes
1answer
87 views

L298N damaged? What to do?

I'm trying to control a DC motor with the L298N motor driver and it worked for a brief moment. I've used the setup mentioned in this video tutorial, but someone in the comments said that with this ...
0
votes
2answers
81 views

How do amps affect RPMs?

I bought a replacement pellet stove auger motor rated at: 120V, 0.51 amp, 1 RPM. (ASIN: B0032D26I6). I installed it into the stove and it works, but the feed rate ...
0
votes
1answer
116 views

How can I limit the current in a 12v car battery to be safe for my 25a motor driver?

I have a 25amp Sabertooth Motor controller that can be powered by my 12v car battery. I have big 24v wheelchair motors attached to the motor controller. I do not know how much current that the motors ...
-4
votes
1answer
55 views

How to extract the motor that spins at a very high speed in a dvd drive? [closed]

According to this, this and this, I gather that there must be a motor inside a CD/DVD Reader/Writer which makes the CD/DVD spin at a very high speed. I have two old working drives and I want that ...
0
votes
1answer
88 views

Will motors cause more noise when connected to a ground plane instead of directly to batteries?

I am making a small robot using an Arduino and two servo motors. There are two ways that I can provide power to the motors: 1) Run power and GND wires from the battery holder to the motors, then ...
-2
votes
0answers
66 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 ...
1
vote
1answer
41 views

Stepper motor drive supply voltage

I am going to use the SM42HT47-1684A stepper motor, its datasheet is following: http://p.globalsources.com/IMAGES/PDT/SPEC/001/K1052328001.pdf In the datasheet the rated voltage of the motor is 2.8 ...
0
votes
1answer
83 views

Four different pwm using PIC 18f45k80

In a 4 phase dc motor control application, I have to excite the coil using Mosfet with the pwm of 12.5 Hz with the train of pulses of 12 khz on each phase. So I am in a position to create 4 different ...
0
votes
1answer
80 views

Motor/driver for smoothest and most constant speed

Which type of motor/controller can maintain the smoothest and most constant speed in the range 300 - 1000 rpm with minimal vibration? ie: low cogging torque, etc. I have an application in mind which ...
-2
votes
0answers
38 views

Kitchen Timer With Motor and Alarm

I have basic electronics and electric knowledge I am trying to make a timing circuit that runs a motor while the timer is running could I connect a motor to the C1 leg of the circuit?
1
vote
1answer
52 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
2answers
48 views

What will happen if we excite a Synchronous Machine with AC?

Normally we excite Synchronous Machines with DC. But what would happen if we provide AC in place of DC in field winding of Synchronous Machine? Will Synchronous Motor start in with AC excitation?
0
votes
1answer
108 views

How to short a dc Motor with arduino?

Thanks for the reply JYelton, Below is the requested diagram of my circuit. simulate this circuit – Schematic created using CircuitLab How to short a DC motor? I was trying to short ...
16
votes
3answers
2k views

Why don't all motors burn up instantly?

A motor rated for 3S (11.1 V) has an internal resistance of 0.12 ohm. The maximum current is 22 A. 11.1 V / 0.12 ohm = 92.5 A Doesn't this mean ...
2
votes
1answer
58 views

Does L293D consume power when not in use

I am designing a robot using the L293D motor driver, and I have just successfully hooked it up to my micro controller. I am using two batteries, one two control the motor and one to control the pic ...
0
votes
1answer
57 views

Determine power needs of a motor

I recently stripped a motor out of an old 2887-z gaf dual-8 mm projector. I'm not even sure if the motor AC or DC, although I suspect its a brush less ac motor. Unfortunately, I disposed of the ...
2
votes
1answer
72 views

Laser controller project

The context is that I want to build a tunnel laser effect, that modulates the angle of the cone according to a sine wave. The purpose being, to create a cool Borg weapon effect for a Star Trek Borg ...
1
vote
1answer
33 views

Do servo motor specifications take into account the gear ratio inside?

I know this question may not belong here but I assume this is most likely where the most well informed people can help me. I am looking at buying a servo motor for a an application that must be able ...
0
votes
0answers
94 views

Control 12v motor with 5v PWM

I have 5v PWM (555 generated) and I want to control speed of a motor using it. The problem is my motor is 12v and by diving it with a 5v PWM I can't reach full speed of a 12v motor. my pwm generator ...
2
votes
1answer
62 views

Power supply problem with L293D

Recently I was trying to drive two motors with atmega328 and L293D motor driver IC. The power supply section is shown below I used a 12V battery with high current driving capability.The motor was ...
1
vote
0answers
94 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 ...
1
vote
2answers
85 views

H-Bridge ic not working as expected

Hi I am using the SN754410 h-bridge driver to try to control a motor using two switches. As I understand the SN754410 should be identical to the L293D. I have hooked up a circuit and I think I have ...
2
votes
2answers
156 views

How many servos can I run on an ATtiny85?

This is my first time asking a question on this website, so please correct me if I'm doing something wrong... I have been working on a small project which runs three Servo motors on an ATtiny85, ...
4
votes
2answers
257 views

What is the purpose of the Motor Run Capacitor?

Looking at a control box for a marine Air Conditioner and it has a HUGE capacitor in it. The schematics label it a "Motor Run Capacitor", but I always thought it was just used to start the motor. ...
-1
votes
2answers
47 views

Change the motor or the gears?

I wonder, what's better to achieve some given torque? To chose a motor with the Kt that gives that torque or to choose a reduction drive that will output that torque from a given motor? I wonder ...
1
vote
0answers
88 views

Use a 2N7000 in place of 2N2222A

Here's a description of both circuits. A ring shaped magnet is mounted on a brass axle and a set of bearings. Coil A and Coil B are wound on the same core. The magnet is placed about 1/8 of an ...
2
votes
1answer
63 views

H-Bridge freewheeling current

I'm building an H-Bridge to drive some motors I have around. I'd like to have a bridge that can be powered by different power sources, for example batteries or atx power supplies interchangeably. ...
1
vote
1answer
92 views

(Arduino UNO) Random Button inputs due to change in code

(First of all: Sorry for the Title.. I really don't know how to describe my problem in one Sentence) I'm an arduino beginner. I build a two button control for an electronic motor. simulate ...
1
vote
0answers
46 views

Old variable speed AC motor wiring

As a disclaimer, I have a little electronics knowledge, but I'm no expert. I've been given an old 1940's Hunter fan and I'm working on fixing it up. I took the base apart and wiring is pretty bad - ...
0
votes
0answers
54 views

Need Help in creating a driver for a 220v AC Servo Motor

I am a new to electronics and have been working on to design a Motor Drive for comonly available Serveo motors like: http://www.alibaba.com/product-gs/1580332915/servo_motor_used_in_CNC_machine.html ...
0
votes
1answer
45 views

Serial port controlling a motor bridge--unknown bug

This is part of a project where I wanted to bypass using a microcontroller and control motors directly with my laptop. I'm using a usb-to-serial cable and use the serial RTS and DTR to control a ...
0
votes
2answers
113 views

What voltage of Li-ion battery to run 24 volt motor (6 cell or 7 cell)

I have the option of replacing my aging and almost dead lead acid batteries with Li-ion to run a 24 volt motor. The data sheet for the Li-ion cells report the cells as having a nominal voltage of 3.8 ...
0
votes
0answers
37 views

Electric motorized soap box

up fron, sorry for my bad english, i am french.... Here is the project. I have built a soapbox car, which used gravity to "work". I now want to add a motor to be able to drive it with a remote ...
0
votes
1answer
89 views

L293DNE Always On

I am hoping to put together a circuit that will control a slot car track from a 30V 3A power supply. I have used the L293DNE as I thought it would cope with the extra load. The circuit is based on ...
0
votes
1answer
340 views

How to wire external power supply on stepper motor

I followed this tutorial to setup my stepper motor. Now my stepper needs 12V and not 5V. So I was wondering how I can add an external power supply without destroying my pi. I found this: But it ...
0
votes
1answer
40 views

What are the effects of the different design parameters when building a linear motor?

I am trying to build a so-called "ironless" linear motor. Conceptually, they are quite simple. Linear motors, generally speaking, are just like rotary motors but "unrolled." As I understand it, the ...
-2
votes
1answer
54 views

difference between a DC motor and gear motor [closed]

Isnt DC motor the same as gear motor? Because what is the use of dc motor without gears?
-1
votes
1answer
60 views

is it possible to use a circuit to reliably measure when a motor has 'stalled' [closed]

ive been fixing my electric garage door opener and it got me thinkin... the motor turns a geared chain that moves the door up and down. there is a small mechanical device attached to the mechanism ...
0
votes
0answers
30 views

Where can I find synchronous machine parameters to use in a PSCAD simulation?

I am trying to observe a loss of field on synchronous motors of different types and sizes. PSCAD seems to want a DQ equivalent circuit. I've Googled the problem and tried several manufacturers' ...
0
votes
1answer
89 views

What kind of motor would I need to turn this central heating valve?

I often forget to turn my central heating down when I leave the house, so I thought it would be cool to make a device that could do it for me and to have a website where I can check and change the ...
0
votes
1answer
98 views

H-Bridge diode makes the motor go faster

I am making a little robotics project were my robot spins around a shaft. Since it can't spin a full 360º turn I placed some limits in the software but just to be sure I also placed two limit switches ...
0
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
146 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
70 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 ...
1
vote
0answers
93 views

Control Loop Frequency [closed]

I haven't started tuning/setting up my controller(s) yet, but already having trouble with the control loop frequency. This code shall later control the position of a X-Y stage. The code: ...