An electromagnet combined with an actuator to convert electrical energy into linear physical motion.

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49 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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1answer
83 views

Bidirectional solid state switch for solenoid

I'm building a circuit to control a flip dot display, which is basically a matrix of solenoids which you control with bidirectional current across the 25 columns and 7 rows of the board. The ...
0
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1answer
40 views

24V failsafe switch that cuts power untill power is removed and reapplied

Does anyone know of a device that when current is applied it will stay on for a certain period of time then turn off until current is removed and reapplied? Basically I have a float switch that, ...
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1answer
55 views

Can a solenoid have its magnetic field “focused”?

Imagine a solenoid generating a magnetic field. Can this field be focused so that it exists only in a certain section of that solenoid at a given time. If a typical solenoid looked like: ...
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1answer
67 views

Solenoid to launch a ping pong ball

I've been looking for ideas on how to launch a ping pong ball a small distance (< 1 metre) for a game. Solenoids look like they might be useful but I'm not 100% on what force/type I need. I can ...
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2answers
93 views

Can I use a LED Driver to control a Solenoid?

I have on order an LED driver and I want to use it as a simple 12v DC output to control a Solenoid Valve. The Driver says Constant Current & Constant Voltage. I obviously don't want 1A pumped ...
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2answers
39 views

Alter Solenoid Stroke

I am looking into using push type solenoids to push microwave touch pad buttons. I understand that the force a solenoid exerts is dependent on stroke length. One site I was looking at listed two ...
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1answer
103 views

Can a Solenoid be driven from one of the pins of a Servo controller?

Would it be possible to operate a solenoid (e.g. this Plastic Water Solenoid Valve - 12V - 1/2" Nominal, suggested for use with "a TIP120 or N-Channel power FET with a 1N4001 kickback diode to drive ...
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1answer
107 views

Arduino - Controlling Electromagnets/Solenoids

I'm a French student and today I have to control some magnetic things with an Arduino. It seems to be electromagnets, but I'm not sure, since I'm a complete novice to electronics. I saw some ...
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2answers
138 views

Solenoid stays on when output turned off

I have a power supply with 12V running into a the common on my PLC. Output 0 on the PLC is wired into a solenoid. The negative on the solenoid runs into the ground on the power supply completing the ...
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2answers
49 views

How the wire of an electric motor produce electricity [closed]

If the wire of a electric motor is insulated, then how will it produce electricity? ??
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2answers
70 views

Controlling Solenoids using Relay vs Transistor

In several examples, relays were used to control solenoids, others use the transistor. In my question, I'm looking at controlling 24VDC solenoid pneumatic valves. What are the advantages and ...
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2answers
537 views

Control 12 solenoids with a raspberry pi

I'm a musician and I'm working on a funny project : control solenoids with a midi keyboard. So I have a MIDI keyboard connected to my raspberry pi connected to my breadboard. Until now everything is ...
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3answers
57 views

2 momentary switches, controlling 4 outputs in sequence using latching type relays

I am interested in building a solenoid controller using latching type relays(containing 2 coils and DPDT). The relays are controlled using two momentary switches. The action I am looking to get is by ...
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1answer
91 views

Need a transistor to drive 12v 400mA Solenoid

I need a transistor whose base will be driven by a controller (3mA max base current). the Vce(sat) should be less than 0.5 or max 0.7. And collector current required by solenoid is 400mA. I am unable ...
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2answers
169 views

How to supply power to a 12V solenoid from China, getting hot

I bought this solenoid from ebay and was wondering how to power it. It says 12 volts as you can also see from the picture, but I tested it with putting a 9V battery straight to its terminals for a ...
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2answers
239 views

Bidirectional driving solenoid using H bridge and raspberry pi

I want to drive a old phone ringer solenoid bidirectionally (20 Hz) using raspberry Pi GPIO pins. I am new to electronics, but I thought a H-bridge design would work to do this: The solenoid is 500 ...
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3answers
454 views

My DIY solenoid does not work

DESCRIPTION: Hi there, I don't know lot about electricity and I`m having problems with my first solenoid-prototype, I tried to build it watching you tube videos. I have attached the pictures of the ...
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1answer
76 views

When -EMF is induced can we keep current the same?

I'm confused at how Back EMF or (-V, -EMF) reduces current, and conserving the overall power. Let use the following simple example to help my understanding: A solenoid produces a magnetic field B, it ...
2
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2answers
271 views

How much force does a solenoid really have?

This hopefully isn't too off topic for this forum, but here goes: after many days of tinkering I managed to get a circuit working that, in the end, energizes a solenoid to pull a lever. Sadly, even ...
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1answer
94 views

Powerful electromagnet?

Is it possible to produce over 1000 lb of magnetic force over a distance of 4 inches(0.101 meters), using an electromagnet? How difficult would it be? Explaining the general spec's of such an ...
2
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1answer
123 views

AC solenoid valve with DC

I have a 24VAC/60Hz solenoid. I used 12VDC just to try, and it worked good (well needless to say it worked as expected with 24VAC/60Hz). What are the effects of a solenoid that's projected for AC ...
2
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1answer
72 views

PNP (MMBT4403) based solenoid driver?

I'm trying to drive this solenoid with an inverse logic output (from a 74154). Here's what I have in mind at the moment. simulate this circuit – Schematic created using CircuitLab R3 is ...
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2answers
342 views

How to power a 12V solenoid

I bought 2 solenoid valves. I'm looking to turn them on/off using my relay. However, I'm not sure what the best way to power them would be. Do I plug them directly into the wall (after attaching a ...
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2answers
177 views

Linear motion - 50mm / 15 N

I need your help or advice. I need somehow to make a linear motion with stroke of 50 mm and starting force about 10N, the holding force after pull (stroke of 50mm) should be at least 20N. The holding ...
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4answers
419 views

How to decrease solenoid speed?

My project is Speed Control of a solenoid. In this project, stroke is 30 mm and I want to plunger cross 30mm in a few seconds (like 5 seconds). For this purpose I want to control the current of the ...
3
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1answer
1k views

Connecting microcontroller 3.3V output to relay using ULN2803A

I have a need to connect an ARM micro-controller with 3.3V digital output pins to a few 12V solenoid water valves. I figured that I can use a ULN2803A for this task. The internal circuit for each ...
2
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1answer
260 views

Clamp diode to a solenoid activated by a raspbery pi, how do I choose it?

I need to activate a solenoid using a raspberry Pi, to do that I'm using a TIP121 to drive the current and a 12V power supply to power the solenoid. I also put a clamping diode (1N4001) but I'm not ...
2
votes
2answers
455 views

Is a C2328 Transistor OK to use instead of a 2N2222?

I have this simple circuit to drive a 5v solenoid. I made it all except that Q1 is a C2328A transistor I pulled out of an old power supply and C2 is a 220uF cap. D1 is just a diode I took out from ...
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1answer
156 views

Is it the frequency that determines the current in a LC Tank Parallel Circuit?

Jump a head to the question if you aren't interested in the background of my project Background of my project I want to create objects of metal. So I need to be able to cast a metal. Aluminium seems ...
0
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1answer
230 views

I have a 110 VAC solenoid and want to know what kind of circuit i should build to control it from my microcontroller?

My solenoid is part of an old espresso machine, the circuit that detected low water level died and i can't replace it. I am adding a micro-controller to remotely turn it on and off and to control this ...
4
votes
1answer
450 views

Circuit to control a impulse solenoid valve from a movement detector

I have a movement detector sensor that generate a pulse (3.3V TTL) for 60 seconds when something moves in front of it. On the other hand, I have a impulse solenoid valve that close on a negative ...
3
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1answer
93 views

Torus shaped solenoid

I need to use one of those for an experiment (a solenoid with the shape of a torus). Unfortunately, as you can see, I don't know the appropriate name for it. I have built myself a temporary one but ...
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1answer
119 views

sophisticated push type solenoid needed for vibrational output-Push type Tabular ?? [closed]

I am looking for a sophisticated push type solenoid. By sophisticated I mean I can control its plunger movement to move following a pattern by a micro controller, over a stroke length of about 10mm. ...
2
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5answers
210 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
1answer
289 views

Getting 12V wall wart to power 12v solenoid driven by Arduino

Scenario: Power a solenoid by soldering on the gnd and pwr cables of a 12v wall wart. I found this wall wart in my house that I think will work. From what it says I assume it can transform 120v to ...
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2answers
137 views

Determining the number of turns for a solenoid

I am trying to determine the number of turns that is required in a solenoid to cause it to move an armature inside. From what I understand the greater the B the more force that it can produce on the ...
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votes
3answers
5k views

How to properly wind coils for a solenoid?

I need to wind a small electromagnet "solenoid?". About 3cm high and 2~5cm wide running at 5V/0.5A. This magnet will be put into a desk bell so it pulls the clapper down and rings the bell. I have ...
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votes
2answers
283 views

why a regular solenoid get hot soon while an audio speaker employed solenoid not? [closed]

I am building a solenoid based equipment. The problem with off the shelf solenoids I figure out is they become hot very quickly. & may burn soon too or at least are not optimal for a constant long ...
2
votes
2answers
276 views

Flyback Diode Placement

In a circuit I'm making I will be using an Arduino to switch a solenoid using a transistor(TIP120). I know I need a flyback diode as shown in basically every example. My question is, is there a limit ...
2
votes
3answers
1k views

What is good device for generating vibrations, offset weight motor or solenoid or some other?

I am building a vibrating device for that I am thinking to use a solenoid for vibration. The solenoid will be used such that device will be mounted in the floor and when a stick is put over solenoid, ...
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1answer
70 views

multiple solenoid activation

I have made some flat strip solenoids of my own.There are about 15 of them and I want to alternately switch group of 6 & 7 or group of 3 solenoids for 5 times successively.I want to know which ...
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votes
2answers
200 views

Do I need a Pull type solenoid or Push type?

I have building a device that will use a solenoid. The solenoid will be used such that it will be mounted in the floor and when a stick is put over it, it will start vibration. That vibration needs to ...
2
votes
2answers
134 views

Choosing proper size of solenoid valve

This is my first question so please let me know what improvements can be made, if I need to edit things, etc. I've recently salvaged a heating element from an old single cup coffee machine that I ...
3
votes
2answers
379 views

Controlling forward/reverse current using arduino & shift registers

I'm trying to control multiple solenoids (home made) using a shift register controlled by an Arduino. Ideally I want to be able to direct them all together either inwards or outward using the current ...
0
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2answers
158 views

Current carrying conductor axially through a copper ring

What effect would a copper ring around a current carrying conductor have on the current in the conductor? How can I go about mathematically modelling the current in the conductor? Details : The ...
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2answers
128 views

Can anyone tell if this component is a solenoid? [closed]

I need a solenoid for a project, so I took apart an old VCR from Goodwill. I was thinking that the ejector for a VCR tape would controlled by a push solenoid mechanism. This is a picture of the part ...
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3answers
589 views

Solenoids causing Arduino to malfunction despite protection diode

simulate this circuit – Schematic created using CircuitLab I have an Arduino Mega that I'm attempting to control some solenoids and LEDs with. The LEDs are 3.3V, controlled through an ...
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3answers
403 views

Need a protection diode if only connected by common ground?

I have many solenoids running on 25VDC. Some are controlled by MOSFETs which are powered by a 5VDC circuit, and others are controlled by physical switches in the 25V lines. The 5V and 25V circuits ...
2
votes
1answer
174 views

Switching a solenoid between 2 different AC/DC adapters?

I have build a circuit to turn a solenoid on and off with an Arduino (actually it's 10 solenoids, but that's not important right now), and now I would really like to make it possible to choose between ...