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

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0answers
30 views

How many coils should I wrap my 4inch long solenoid with?

I am making a solenoid as a project... but I am not sure how many coils I should wrap it with. I am using copper wire, it is 32 AWG. I have tryed wrapping it with 100 coils, but I found that it's not ...
0
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1answer
37 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
58 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
51 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 ...
0
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0answers
16 views

Will this TinyCircuit dual motor driver circuit be able to work with these two solenoids and two motors and an 11.1V LiPo?

I'm trying to create a control system for a rocket. I know its a big task. But basically all I have to do is set up a TinyCircuit to pull the pin on two solenoids at 750 feet up in the air which I ...
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2answers
49 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
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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 ...
1
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2answers
68 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
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3answers
179 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
69 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 ...
0
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2answers
79 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 ...
1
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1answer
40 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
107 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
votes
5answers
163 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
150 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
votes
1answer
52 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?
4
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2answers
154 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
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1answer
77 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
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4answers
131 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
47 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
48 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, ...
0
votes
3answers
181 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
59 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
43 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
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0answers
98 views

Magnetic field in a multilayer square solenoid

I have a 7 layers square solenoid with each layer having same number of turns.I measured the magnetic field with a Tesla meter at different currents and i used the formula B=m*(N/L)*I and N is the ...
0
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1answer
56 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
101 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
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1answer
212 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
78 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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0answers
86 views

What is the best way to share 12V, 22V, and 5V power?

Please bear with me - I'm a software developer that hasn't worked with electronics since college. I'm trying to replace the internal electronics on this pinball machine: ...
0
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5answers
92 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
97 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
82 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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0answers
29 views

Generating current from a high voltage power line [duplicate]

I learnt that power lines carry high-voltage electric current with electric fields and a magnetic fields around them (That i just think go to waste). So i was asking, if i surrounded a single power ...
0
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1answer
37 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 ...
1
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1answer
104 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 ...
1
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2answers
217 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 ...
1
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0answers
89 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
vote
1answer
109 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 ...
1
vote
4answers
230 views

12V solenoid drawing more current than it needs

I'm fairly new to practical electronics so I apologize if any of this is obvious. I am currently trying to use a microcontroller to control the energizing of several 12V solenoid valves using a PC ...
0
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2answers
76 views

Calculating peak current of solenoids

I'm a electronics newbie, and I'm making a project with 8 24v solenoids playing percussion quickly. I want to power these all with the same power source, so I'm being careful. This is similar to ...
0
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2answers
355 views

Electrolytic Capacitor in Solenoid Circuit

I was looking at a few solenoid circuits. I came across this one that had an electrolytic capacitor across it (whereas most just seemed to skip it). Does this capacitor serve any other purpose ...
0
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1answer
65 views

Sprinkler Control Power supply requirements questions

Not sure if this is the right forum or not... I am looking to build a custom sprinkler controller using a Raspberry Pi and a relay board. The question is around the power supply. The valve ...
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votes
2answers
318 views

Many small and cheap linear actuators [closed]

Me and my friends are trying to build a linear actuator matrix. It's supposed to be a grid of pins that go up and down at reasonably fast speed (more than 1cm/s, the faster the better). Problem is, ...
0
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1answer
189 views

What kind of relay do I need for for 12V source with a 5V control voltage

Trying to figure out which relay I need for a project I'm working on. The source is a 12V battery, and I'm looking to turn on a 12v solenoid using a relay. I want the control voltage on the rely to be ...
2
votes
2answers
197 views

Is this the behavior of a broken mosfet?

I designed this circuit to switch on/off 8 solenoid valves for a programmable dancing fountain that I am building. The GPIO is coming from a Raspberry Pi. VCC is coming from a 12V deep cycle car ...
1
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2answers
408 views

EMC considerations for driving a solenoid via PWM over a long cable

We're designing a circuit which essentially has the topology shown below. We're driving an inductive load (24V, 3.8Ohm solenoid - max avg current = 2A, but peak current can be 6.3A) using PWM. ...
1
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1answer
198 views

Might I be better off using a TIP122 Darlington than a FQP30N06L MOSFET?

This is a followup to: Simple ESD protection for MOSFETS I built the circuit described in the above post using FQP30N06L MOSFETs and after several hours of testing two of the MOSFETS died at nearly ...