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Questions tagged [actuator]

An actuator is a device for converting energy into motion. They may be pneumatic, hydraulic, electric, or mechanical.

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4answers
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Methods to accurately move an object across a 2-D plane

This is the opposite/complement of my previous question, which concerned measuring the precise position of an object as it is moved/drawn by someone over a short duration. Assuming I use one of @...
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2answers
437 views

Sensors that are also actuators?

this is more of a theoretical question, and I do not know if this is suited for this QA site at all, but at school I was asked to provide 3 examples of sensors (in the narrow sense) that are also ...
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4answers
18k views

How do I build a bracelet that vibrates once every n minutes? [closed]

I intend to establish a few new personal habits that eventually become second-nature to me. To assist myself, I want to wear a bracelet that vibrates every, say, 5 minutes all throughout the day as a ...
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9answers
16k views

hardware for pushing buttons

Many times I want my computer to interface old hardware. Such as radio, light switch, etc. This mostly involves pushing pressing and moving various buttons and switches. I don't want to buy new ...
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3answers
3k views

Muscle wire considerations

I am in the planning stages of a project for my new son/daughter, who will be arriving in December. The project involves using muscle wire to make bug or bird slowly flap it's wings. The form will be ...
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3answers
16k views

Where can I get a small cheap linear actuator?

First, I should clarify: I am not looking for much power or much precision. I am looking for the cheapest thing I can plug into an arduino. I am just looking for stuff I can use for prototyping/proof-...
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3answers
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Can I use a subwoofer as a linear actuator?

I need an actuator with a few mm of travel and it has to be very responsive to a very low frequency (DC 10 Hz) sine wave generated by a function generator. I'm thinking of getting a cheap subwoofer ...
4
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2answers
809 views

Ideas for precisely moving a small object in 2 dimensions?

We would like to precisely control the position of a small object in a X-Y plane. The object we are moving contains a LED diode and some optics. The restrictions are: The total area is 9mm x 6mm We'...
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2answers
270 views

Actuator resistance

Sorry, I’m not much good at electrical work, but I’m trying to understand why this actuator I purchased doesn’t use the rated power specs. I expect this question may have been asked before, but I can’...
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1answer
289 views

Are there electronic devices that can be used to replace hydraulic cylinders with short strokes

We use hydraulic cylinders in many applications to release brakes and clamp things. The choice of hydraulics is based on them being strong relative to their size. There are a couple of downsides with ...
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3answers
2k views

Selecting small motor (wrist watch sized)

I want to build a skydiving altimeter, which is a device with a pointer that looks like and is slightly bigger than a wrist watch. In this device I want to display altitude information using a pointer,...
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2answers
2k views

How To Interpret PID Output in a Slow Response System

@Update: A few days have passed since I asked this question and I've had a chance to do some research based on the answers I've received from @R Drast and @Spehro. I'm not sure this update is the ...
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1answer
974 views

Driving a DVD-ROM lens actuator

I have a spare laser diode lying around not being used. The other day I had an idea that it would be cool to have it draw the time on the wall for me as a laser wall clock. In order to do that, I'd ...
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2answers
2k views

Switching 24V and GND with MOSFETs

I need to control motion direction of linear actuator. It works off of 24V power supply, and if i switch polarity of supply it goes to opposite direction. The supply for actuator is simple DC with no ...
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3answers
2k views

Automatic Button Pushing Device Hardware

I want to make a wrist mounted button pusher, connected to a timer that can be programmed with a routine to push buttons at specific times accurate to a millisecond. I've been told I could use a micro-...
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4answers
5k views

Can a Computer Motherboard Speaker/Buzzer output voltage switch a relay?

Most 12v relays I've come across require 4v to switch on. I don't have a voltmeter handy to test my computer motherboards voltage output, and if it did give out +4v and held a long enough duration ...
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2answers
515 views

Playing back recorded movements with servos

I'm new to motors/servos so could do with a bit of advice. I'm currently working with 3 Dynamixel servos and it's cool that they can be programmed fairly easily and I can get the current position when ...
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3answers
1k views

Energy conversion from Electrical to Mechanical

I have a requirement where I have to design a very small device capable of pulling in and out a small piston through a feedback.I know it can be done using motor but AFAIK I need higher voltage and ...
2
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1answer
4k views

What is the difference between push and pull solenoid? [duplicate]

I want a solenoid that stays retracted and propels forward when current is passed through it. Is there a solenoid that does this? What is the difference between push and pull solenoid?
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2answers
4k views

Driving hard drive voice coil actuator with PWM

I have been trying to control a voice coil actuator with PWM input, but i have the following problems and would like you to correct or point me in new directions. I have an arduino which outputs PWM ...
2
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2answers
255 views

Chicken coop door opener circuit

I'm designing a circuit that will open a chicken coop when the sun comes up. I've attached a bungee cord to the door which opens the door when a pin is released. This pin is released by a car door ...
2
votes
1answer
224 views

Does this brake control schematic make sense?

I am participating in a student project where we are building small, portable vehicles, starting with a pocket bike and some materials. We are also allowed to buy parts on our own. Our current plan ...
2
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1answer
151 views

Function to Determine Plunger Force on Solenoid Actuator

I am designing a solenoid actuator system and need help determining the kinematics. I need to know what the force from the solenoid would be as a function of the plunger's position. Would there be a ...
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2answers
113 views

Electronic/electrical actuator that HOLDS its position if power is lost?

Is there any sort of electronic/electrical actuator that HOLDS its position if power is lost? I am working on a project for a clutch actuator in an AWD system. One of the required tasks is to ...
2
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3answers
360 views

Finding a small, low-actuation pushbutton

I'm looking for a small kind of pushbutton that I'm not even sure exists. I want it to have these properties: ...
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0answers
602 views

Help need controlling linear actuators on my car project

Looking for some electronics guru who can help with my car project. Personally, my skill level/experience is below novice. I have an ISIS system controlling the car electronics, including two of ...
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4answers
3k views

How to drive a linear actuator in both directions

I would like to drive in both directions my linear actuator (12VDC, 13A max). My electronic board outputs two signals (obviously, I also have GND signal): Forward: +12VDC (2A max) Backward: +12VDC (...
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3answers
613 views

Switching between +9V and -9V (using 5V logic)

I got some linear actuators today and found out that when I give them +9V they extend and -9V makes them contract. This is easy enough to test by hand, simply by wiring the actuator up to the battery ...
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4answers
244 views

Brushless motor design with additional separation layer at the air gap

As a thought experiment, I was thinking about how to actuate an passive impeller inside a tube from outside, contactless. Imagine a tube equipped with an impeller inside it. The impeller is mounted in ...
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4answers
279 views

Dosage control through flow meter and valve

I am trying to make a drinks machine that when a button is pressed, a predetermined amount of liquid (not determined by time) is allowed through a solenoid or other valve, and measured by a flow meter....
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2answers
936 views

Solenoid to launch tennis ball [closed]

I am interested in putting together a tennis ball launcher. It's accuracy/precision are not important. Even varying distance by ~50% or more per shot doesn't matter (it's for my dogs). What type ...
1
vote
2answers
965 views

what would be the most suitable components to replace some relays?

I'm working on an electronic product based on a microcontroller that must be able to control a series of actuators: 230V AC motors ON/OFF, 24V DC motors ON/OFF, 80V/20A heating element ON/OFF. The ...
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2answers
631 views

Solenoid Fail - No Force

I have designed and built a small solenoid and... it doesn't exert any force on the steel bolt I am using as a plunger. I could freely move the plunger back and forth without any resistance. I am ...
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2answers
803 views

How to know the right amp to power a 12V actuator?

I have an Arduino Uno. I need to use an electric linear actuator to control the movement of a joint in which I have installed a rotary encoder to know in what angles it's moving. The actuator is a 12 ...
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1answer
249 views

I need help in rewiring a chicken coop pop door

4 years ago I purchased an automatic chicken pop door for my coop. It is 12 volts and the door opens at dawn and shuts at dusk by means of a photosensor. It is a home built device that works quite ...
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3answers
3k views

Powering and operating dual electric linear actuators

I am in the process of building a height-adjusting desk. I am pretty good with computers (I'm a programmer), but I never learned much in the way of electrical engineering. I recently purchased two ...
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1answer
732 views

What is the speed of hard disk actuator arm?

There is a lot of material discussing the rotational speed of the magnetic disk in HDD but not about the rotational speed of actuator arm. What are the typical actuation speeds of the actuator in ...
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2answers
1k views

Linear actuator torque control

I want to build aplication where I will provide defined force with linear actuator. DC motor is going to be stalled most of the time and and controlled torque should be applied. So at the actuator ...
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1answer
464 views

L298N Module Out 1 and Out 2 failure

I have an L298N motor controller module, rated at 5 amps. I'm using it to control two 12 volts linear actuators, and I'm using a current sensor per motor to learn when the motors have reached a high ...
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1answer
916 views

Control of electric actuators

I'm new to this forum and I am trying to find a solution to control three small electric linear actuators I have made for my RC controlled model aircraft, they have mini 6 volt geared brushed DC ...
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3answers
586 views

Controlling a mechanical shutter with an electromagnet

I'd like to drive a pair of mechanical shutter / apertures with an electromagnet. For those curious, we're using a shutter from Edmond optical. For the particular application, I'd like to design a ...
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1answer
46 views

Loading an Asynchronous Generator

I am doing an experiment that involves loading an asynchronous 50 HZ generator. For the load to consume current it has to be a capacitive load to cause a phase shift between the current and the ...
1
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1answer
68 views

VNH5019A Flyback issue on custom PCB

I have a custom high power PCB I recently designed and am currently testing. It is designed to use 2 linear actuators link. I am using a VNH6019A H-bridge to control them. They operate simply as -12v ...
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3answers
635 views

Automating a Fluid Dispenser with an Arduino

I would like to automate a process which will require applying force to the plunger of a 5ml syringe to dispense fluid at about 10ul per second onto a 25 mm by 75mm surface and I am thinking of using ...
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2answers
116 views

What part/actuator do you think they used

At around 2:20 in this video there is an interesting use of electronics. You can watch the video but in short there are these little spoon creatures that pop out from behind a covering. The speed at ...
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0answers
54 views

Is there an opensource equivalent to Phidgets?

For those who don't know, Phidgets are a hardware platform for interacting between PCs and hardware; they're a sort of "industrial lego". They have DIO, relay drivers, sensors etc. Their key utility ...
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0answers
38 views

Small lock actuator controlled by single lipo

I am working on a project, in which I have a small box, in which I need it to be locked from the inside. It will have a panel on the front to enter in a code to open it. It needs to be very small, ...
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1answer
69 views

Can i use a push button switch to operate an actuator

Please forgive me if my question is just silly. Really strugling to find answers. I have bought what i belive to be a dpdt switch. It is however a push button switch. It is an 8 pole switch with 2 ...
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0answers
109 views

Linear actuator - Wiring and control

I have to use a linear actuator in my project and according to my need and availability I found this Linear actuator MEGAMAT2. This requires 24 V supply. But I am unable to understand the pin ...
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0answers
367 views

Ways to control multiple linear actuators seperately?

I intend to control multiple linear actuators at the same time (20+). These actuators need ~9V each to run, and I simply want them to either be on (pulling) or off (relaxed). Each actuator is to be ...