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

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1answer
49 views

Are electric linear solenoids the best option to push a capacitive screen button on a smartphone?

I'm trying to figure out if electric linear solenoids are the best option to activate an interface element on the touch screen of my smart phone. I have also heard of linear actuators and pneumatics ...
-1
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1answer
29 views

Which solenoid to choose? [closed]

I want to buy a Solenoid but can't make up my mind. The reason is that I want to use a 12v 1 or 2 AMP DC power supply. Not sure which one of these will be OK to use. ...
0
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1answer
32 views

Trouble Driving a Solenoid with a LiPo Battery

I am having trouble getting enough current to drive a bi-directional solenoid with two leads. I am using a half of a L293 (Quadruple Half-H Driver) to drive the solenoid back and forth. The solenoid ...
0
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1answer
53 views

Is it bad to keep a solenoid activated?

I read somewhere that keeping a solenoid activated is bad for it (overheating or something). Is this the case, assuming that the power supplied to the solenoid is of the correct voltage, or is it OK ...
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1answer
125 views

(schematic) Using a micro controller to drive Opto-coupler > 555 timer > MOSFET

I'm trying to use a micro-controller to activate an opto-coupler connected to 555 timer which is connected to a MOSFET. The circuit will drive a solenoid which draws 2amps at 12v. I'm new to circuit ...
0
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1answer
51 views

How large should PCB traces be to control a solenoid?

I'm working on an electronics project that'll regulate and offboard solenoid. The leads controlling the solenoid will need to sustain fairly high levels of current. This is the solenoid I'm working ...
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0answers
19 views

bifilar coil model

I am experimenting with paralleled connected bifilar coils with an air core. I was wondering, how can I model these with an electric circuit? Also, how could I simulate its self-inductance effect? Any ...
1
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1answer
74 views

TIP 120 replacement

Although I read the article advising against using TIP120: http://sensitiveresearch.com/DoNotTIP/ I only have couple of other transistors on my hand: ...
0
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1answer
43 views

MOSFET overheats and results in short circuit

I use this 40V, N-Channel NexFET Power MOSFET http://www.ti.com/product/CSD18504Q5A in simulate this circuit – Schematic created using CircuitLab The solenoid takes 25A peak current. ...
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1answer
57 views

Optocoupler delay off MOSFET solenoid

This is to trigger a 12v solenoid (acting as a laser shutter) with 5v (JP2) thru an optocoupler. The problem is 5v line have bit fast interruptions on a laser show, so I'd like to add a bit of delay ...
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0answers
54 views

Driving pinball flipper with N-Channel MOSFET

I am trying to drive a pinball flipper using the circuit below, but after switching the flipper on a few times the MOSFET failed (short to ground) and the voltage level shifter appears to have been ...
0
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0answers
16 views

Holding Magnet Solenoid - are there powered=OFF variants?

I'm looking for a holding magnet solenoid that releases when powered. The idea is that I'll be using it as a switch to release a hanging object remotely - so I only need it drawing current for a ...
0
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1answer
110 views

Need help trying to design an H-Bridge to power electromagnet

I am trying to design an H-bridge inverter to supply maximum current to my coils. I need to supply as much current as possible so that I can make a electromagnet whose polarity constantly flips so ...
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votes
1answer
59 views

Build 0.5 T solenoid with [closed]

I want to build 0.5T solenoid (Length 30 cm and diameter 0.5 cm). Can anyone provide me the formula taken into account the length, radius of the solenoid and Radius of wire, i.e. Outer radius after ...
0
votes
1answer
63 views

Remotely (long-distance) triggering a 12V solenoid?

I have purchased a "1CH DC12V 2000M Long Range RF Remote Controller Kit" - this is a remote relay. With this gear, I have to power both the receiver and the load with 12V sources. I'm trying to ...
2
votes
2answers
187 views

Using a relay switch to switch power to solenoid

I'm fairly new to electronics, so I'm hoping I'm not so misguided that I am wasting all of your time. Basically I need to power a solenoid which in turn controls a gate valve, and the solenoid ...
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votes
1answer
60 views

eddy current brakes

I am trying to make an eddy brake prototype It works perfectly using a permanent magnet, but I have to make it using an electromagnet which is not working. I am using a solenoid purchased from Amazon ...
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2answers
78 views

Switch on time limiter for a solenoid - will this circuit work?

Here is the problem i have: there is an electromechanical door chime (just a solenoid with a rod inside, which hits one brass pipe when switched on, and, propelled backwards by a spring, another when ...
16
votes
4answers
4k views

Why did my fuse blow after 3+ years of no problems?

For several years, I have had a solenoid wired to the 24VDC output of a PLC (Rockewell Automation 1769-OB16). To protect the PLC output card, a fast-acting 500mA fuse was installed between the PLC ...
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2answers
86 views

A robust way to supply power to a solenoid

Solenoids typically heat up very quickly and it seems a few seconds of power supply is already adequate. Does anyone know of a robust/established way for supplying just a few seconds of power to a ...
3
votes
3answers
210 views

How to “spread linearly” the force of a solenoid

For a pet project of mine, I'm interested in finding a tubular solenoid which force is spread linearly over a longer length. The project is based on IA and uses a programmed controller (and sensors) ...
1
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2answers
104 views

Parallel windings on a solenoid coil

Suppose I have a fixed voltage supply of 10 V and I need to get 20 amp-turns from my solenoid coil but my solenoid coil with 10 turns is 10 ohms, so I am getting 10V/10 ohms = 1A, 1A * 10 turns = 10 ...
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2answers
90 views

Supplying more current to a current limited DC motor

simulate this circuit – Schematic created using CircuitLab Added requested schematic. Current circuit is on the left. Proposed additional circuit is on the right. I've never seen two ...
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1answer
54 views

DC Motor + Pull Solenoid + 2 Microswitches — Rigging and Timing Question?

so my senior design group at UCF needs some help with the electrical engineering aspect of our project as we are all ME majors and lack confidence in this area. Our design is driven by a DC gear ...
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1answer
158 views

Best Electronics To Salvage Electromechanical Parts From [closed]

I know there have been 2 previous questions (From what used/junk equipment can I salvage solenoids from? and Taking apart old electronics) on this, but this one is a bit different. Also, questions ...
2
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5answers
207 views

Converting a 12V pulse to a shorter 24V pulse?

I have a bunch of Point-of-Sale printers which can emit a ca. 1 second long 12V pulse in order to open the attached cash-drawer. Because of a procurement SNAFU, I now also have a bunch of cash ...
3
votes
2answers
165 views

MOSFET burning out when attached to a solenoid

Apologies for the very poorly written previous question. We have a circuit that consistently burns out our MOSFETs when we attempt to use them at full power, 250V, but they seem totally fine at 200V. ...
2
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1answer
89 views

Can i use 12 v solenoid valve directly connect with the 12 v battery?

Can I connect 12v solenoid valve directly to the 12v battery?
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2answers
197 views

Solenoid doesn't actuate when driven through MOSFET

I'm trying to drive a solenoid with a GPIO on a Raspberry Pi. Here's the schematic: The current through the solenoid and MOSFET should be: So the voltage drop across the MOSFET should be: ...
0
votes
1answer
102 views

Keeping a consistent supply voltage while driving a solenoid from battery

I am working on a project where I would like to pulse a solenoid using an arduino with the power from both coming from 4xAA batteries. The project is a puzzle, when you solve the puzzle, the solenoid ...
0
votes
4answers
178 views

SOT-23 NMOS transistor power dissipation

I am working on a design of a control system that controls a few small solenoids, each drawing about 200 mA of current and operating at 15-18 V. These solenoids are activated by NMOS transistors. Due ...
1
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1answer
56 views

What is the optimal disposition of coil to maximize the magnetic field created?

I am trying to create a powerful magnetic field using coil, and possibly some ferromagnetic metal bars. The white box with the X on it, is empty, or made of air. Saying that I have no limits on ...
0
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1answer
53 views

12V 400mA solenoid

I am trying to hook up a train horn on my truck and I want to open a valve with a switch. I have a solenoid actuated valve that is 12V 400mA. Can I connect it directly to a switch from the battery, ...
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3answers
235 views

Controlling a Solenoid With Raspbery Pi GPIO Output Using a Transistor

I'm trying to control a solenoid using the RasPi 2's GPIO pins. Since the solenoid needs more power than the RasPi can provide, I'm using a 9V battery to provide the power. I started with just wiring ...
0
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1answer
97 views

How to power small solenoid with a 3.7V lithium battery pack

I've got a small 1.5V 2W pull-type spring-loaded solenoid I'm trying to fire with a 3.7V (45mAh at 1C) lithium pack for about 0.5 sec. I am able to get it to work using a (1.5A max) voltage source at ...
7
votes
8answers
2k views

Strange behaviour in PCB when solenoid turns off

Hi all, I designed a PCB for a lock control. You can see the PCB on the image. Some explanation on the abbreviations: Ext: exterior 12V power source Batt: 12V battery 1702: 12V to 5V power ...
1
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0answers
53 views

Is there a way to shield the fluidics of a solenoid valve from its magnetic field?

Are there any solenoid valves on the market that specifically shield the fluidics from the magnetic field of the solenoid actuation? Either by physically redirecting the fluidics around the coils or ...
1
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1answer
59 views

Custom Solenoid design and control

Question: How can I safely control a homemade solenoid that draws around 90A at 12v with a relay that has a hard limit of 10 amps? Background: First of all let me start off by saying that I know ...
0
votes
1answer
64 views

How to operate a solenoid [closed]

I purchased some of these solenoids and cannot get them to operate with a 12v battery. I am simply connecting the ground to one open wire and the positive to the other and the solenoid does not ...
0
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1answer
183 views

Solenoid valves in series or parallel?

I already have the main solution and dosing solution tanks hooked up to each other, with solenoid valve S1 controlled by the liquid level switch through the DC power supply and DC/AC SSR (see image), ...
1
vote
1answer
470 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?
1
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2answers
80 views

Sense if USB is alive or dead ++

I'm using a 16 channel digital output module (NI 9375) from National Instruments which routes 24v (from a PSU) to several solenoid controlled pneumatic valves. So a valve is open when 24V is sent to ...
0
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5answers
103 views

measure instantaneous position of a solenoid piston?

I'm trying to improve speed & force of a solenoid and its power electronics strategy. So far I can measure many variables such as : tension current waveform shape time to reach final excursion ...
2
votes
1answer
108 views

Solenoid circuit current issue

I have been working on a circuit go make a solenoid switch polarity with arduino. I originally used transistors (NPN) rated for 1A and 625mW in between the ends of the solenoid and ground. These all ...
1
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1answer
118 views

liquid level switch and solenoid valve circuit

I am trying to make sure that I have this circuit hooked up right before I actually put it to use. I’m planning to use the liquid level switch (McMaster PN:50195K93) to open the solenoid valve ...
0
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1answer
46 views

Autoelectrics: Testing components off 12v battery

I'm quite good with mechanics and am just starting to learn more about electrics specifically applicable to automotive. One thing I am still yet to get the grasp of is the way electricity behaves. It ...
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1answer
162 views

Arduino Controlled adjustable current 0-1A,18V

Hello Masters of Electronics, I'm civil ingeneer, electronics are big unknown to me, but it wakes up my interest. I would like to control proportional pressure with electronic proportional pressure ...
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2answers
318 views

Driving a solenoid with low voltage source

I have a 5V solenoid here, but my power source (battery) is only 3.3V . It's a pretty small solenoid, so it doesn't need huge amounts of power, but directly connecting it to the battery terminals wont ...
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0answers
99 views

How can I add redundancy to the flyback diode protection across an inductive load?

Dear StackExchange users, I want to add redundancy to a flyback diode system that is protecting an N channel MOSFET from flyback of an inductive load but I don't know how to accomplish this! I am ...
1
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1answer
120 views

Procedure for finding the right MOSFET, diode and resistor to make a solenoid valve open/close? [closed]

I need a right MOSFET to make a 8 valves open/close about 15 times per second! It needs to switch very fast. Anything that can slows the speed of the valves is not desirable. From what I see the ...