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Questions tagged [solenoid]

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

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3answers
59 views

The role of solenoid's wire diameter?

I'm not an expert in the electromagnetic field and need to design a solenoid actuator with 1 kg force approx. I am wondering if I change the wire diameter of the coil, what happens in solenoid's ...
1
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2answers
65 views

Solenoid stroke vs force

I need an actuator to press a button in a production tester for a device I designed. The seemingly most straightforward way to do this is to use a solenoid. Those should be good for pressing small ...
6
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5answers
1k views

Solenoid fastest possible release - for how long should reversed polarity be applied?

If I understand correctly, a regular solenoid like this one does not have a permanent magnet as core and as such it doesn't matter with what polarity it is activated (please correct me if that's ...
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0answers
42 views

Control a solenoid position “in / out” with power only (no spring)

I'm going to use a < 5$ solenoid (vertically oriented) that has to press something. If I understand well, a linear solenoid like this one: moves to one precise position when powered, but when you ...
6
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4answers
762 views

TIP120 Transistor + Solenoid Failing Randomly

I am using TIP120 transistors (controlled by 74HC595 shift registers) to control 12VDC, normally closed solenoid valves. Everything is working in short-time tests however when left overnight, some ...
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2answers
37 views

Triac switch cause of heating

As a newbie to hardware design, I'm having some trouble picking components. I want to switch a 24V AC Solenoid valve using a triac. According to my research/experience, transistors heat up during use. ...
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1answer
38 views

Can I use a power supply to power a solenoid electromagnet?

I've got several unused coils of 14 gauge wire that have ferrite iron cores cut to the length of their spools. They have maximum current power transmission ratings of ~5.9A, and according to a ...
1
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1answer
36 views

Shape of a core for use in a solenoid

I am currently designing an electromagnetic accelerator meant to accelerate a spherical nickel-plated NdFeB (neodymium) projectile along a circular tube, in a similar manner to a particle accelerator. ...
1
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2answers
98 views

Can I use a current divider to protect my IC?

I designed an oscillator circuit using a TLC555 timer IC to create a 2 second pulse, which is used to drive a 12V 6W solenoid via a relay. Both the IC and the solenoid are run off of 12V, but every ...
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2answers
112 views

Maximum power for a 12V solenoid

I have a 12V 8A 35mm-stroke solenoid from eBay (similar to this listing) which I am powering with a 12V 20A PSU. I am using two of them for a homemade pinball game. At the moment they are hooked up ...
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1answer
74 views

Why am I measuring the power different than the given rated power?

There is a solenoid-valve where I measure its resistance as 55 Ohm across its terminals. The photo of its label is shown below: Above it says 24V DC 8W. But I measure the solenoid's DC resistance as ...
2
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1answer
79 views

Is a diode needed for this simple mini solenoid circuit?

I am building a mini pinball machine, which is about 10x22cm. To drive the flippers I plan to use this 5v mini push/pull solenoid: https://www.sparkfun.com/products/11015 , along with momentary SPST ...
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0answers
30 views

Are solenoid's magnetic field strength more dependent upon N loops or R radius of wire?

For a project my team and I are experimenting with different sized solenoids. We are trying to maximize the field strength exiting the end of the solenoid as opposed to internal field strength. The ...
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2answers
129 views

555 timer circuit switching automotive solenoid with PNP & NPN switching transistors

I am trying to design a 30 second timer circuit to switch an automotive solenoid that draws about 0.8 amps, and need some help please. StackExchange posts have been very very helpful so far, and by ...
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1answer
84 views

total newbee question : use transistor as a switch

Ok, I don't know anything about transistors, and my knowledge about electronics is basically limited to U = R . I and ...
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1answer
87 views

Can this capacitor move this solenoid kicker [duplicate]

I'm buying this solenoid: The data are: Voltage: 12V DC Current: 8A I need to build a kicker: push a button, capacitor charge, when is charged the solenoid kick an object. I want to do it with ...
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1answer
83 views

Choosing the right (flyback) diode to stop contacts (points) arcing (sparking) on solenoid (relay)

Clock with a simple electric remontoire, consisting of a solenoid, with an arm, that kicks back the main spring, rewinding it. Solenoid coil data: operating voltage: 12V-15V measured resistance: ...
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0answers
67 views

Control magnet through stainless steel wall

I'm a mechanical engineer enthusiastic about learning electrical engineering and I speak french so I thank you in advance for your comprehension and your help. I would like to be able to activate an ...
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1answer
69 views

voltage drop - operating a solenoid after a logic gate and a LED

I have started meddling in circuitry, but I lack any sort of formal training. Subsequently I apologise for my ignorance. The circuit I have made (on paper) so far has a number of issues, but I want to ...
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4answers
157 views

Controlling 12V Magnetic Latch Solenoid with RaspberryPi 3b

As the title says I am trying to control a solenoid with a raspberry pi. I am currently using an npn transistor (will post link with parts at the bottom) however I am having a hard time getting it to ...
0
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1answer
35 views

custom solenoid trigger circuit

I have a custom made solenoid that is required to work at 60V to actuate with enough force. I have tried two circuits shown in the figure below but both don't work. In the first circuit, the voltage ...
1
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0answers
903 views

Wiring DIN connector with 3 wire DC solenoid valve

im buying [smc VQZ 212 5YZ1 C6] 3 port solenoid valve with 2 possible position(let say A and B). This solenoid work with 24VDC and have 3 pin/ wire. There is No 1, No 2 and GND pin. I will never ...
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2answers
87 views

24 VAC sprinkler valve using DC power

I am creating a circuit that includes a 24vac sprinkler solenoid. I need it to be portable so I'm planning on using DC current rather than AC. What is the best way to do this? If I just use straight ...
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1answer
66 views

Raspberry Pi Zero - PWM & Python Help

Disclaimer: I am very new to electrical engineering, but I'm determined to figure this project out. I'm currently working on electronic solenoid lock. Here's a image of what I have so far. I have a ...
1
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1answer
118 views

Operating a 24VAC solenoid with a Triac. Protecting with TVS DIODE, RC Snubber or both?

As part of a project I am controlling 24VAC solenoid sprinkler valves like this https://rayshobby.net/wordpress/understanding-24vac-sprinkler-valves/ using a triac (BT1308W) http://www.mouser.com/ds/2/...
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2answers
126 views

Why there is a voltage drop while connect multiple 12 V or 24 V solenoid valve with a 24 V DC adapter

I am doing a water plant project. I need to control multiple solenoid valves with my micro controller circuit using relays. When I connect more than 4 solenoid valves (12 V) with a 15 V adapter it ...
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2answers
98 views

Boosting voltage to power a solenoid (pulsing intermittantly)

I would like feedback on the following circuit design please. I am powering a solenoid using a 3S LiPo battery but want to increase the voltage to 35v. I am using an XL6009 module to boost the ...
0
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1answer
32 views

triggering a solenoid valve from batteries charged by hydroelectric system

I'm providing a slow-closing solenoid valve for a hydroelectric system in a village in the Philippines. I need to have the normally closed valve activated to open when the batteries are drained to a ...
0
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1answer
48 views

Can someone help me design a circuit that will open when power is applied and close after power is removed?

I am using an air conditioner thermostat transformer which provides power to my circuit. When the thermostat powers up, the door opens. I want the door to remain open until the thermostat shuts off, ...
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0answers
73 views

Turns per unit length and inner core area of solenoid with multiple layers of windings

I have wound a solenoid with 675 turns of 16 gauge wire. The windings are in layers, one on top of the other, for a total of about 17 layers of about 40 turns each. The end to end length of the ...
1
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1answer
40 views

Why does a Solenoid driven with intermittent duty cylce produce higher force than with continuous drive?

I'm selecting some solenoids with my MechE and I noticed something that I didn't have an intuitive explanation for. We were looking at this solenoid and noticed that at the bottom the forces ...
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1answer
61 views

Safe solenoid driver: can I use a slow blow fuse?

I'm building a device that uses a microcontroller to control 15 solenoids via a preexisting multichannel DC solid state relay board. When all is working as intended, at most one solenoid will be ...
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1answer
71 views

Proper Flyback Current Protection Circuit for Variable Voltage Solenoid Driver

I am using a darlington buffered op-amp to drive a solenoid motor at variable voltages (for variable speeds of actuation). Here is my circuit as it is now: I am wondering which of the two flyback ...
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1answer
136 views

Operating a 12V electric lock with arduino

I have a similar electric lock-style solenoid like this one. If we trust the manufacturer it draws between 1.2A and 2A at 12V .I'm currently using a N-Channel MOSFET 60V 30A - FQP30N06L it works just ...
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4answers
270 views

NodeMCU control 12v solenoid

I am trying to control a 12v solenoid from a NodeMCU. I bought the wrong MOSFET, I've got an IRF520 (the website I bought it from said the gate threshold voltage was 3.3v, so I thought it would work, ...
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4answers
201 views

Flyback Diodes For Inductive Loads With Long Wire Runs

I have a project that uses several high power DC solenoids (50 VDC) that will have ~10 feet of wire between them and the driver board. This is for pinball machines. These solenoids typically come with ...
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2answers
664 views

Increase the pulling force of a solenoid with a permanent magnet [duplicate]

I have a number of solenoids I would like to use in a project. The problem is that they're not quite powerful enough so I've been trying to come up with ways to increase the their pulling force ...
0
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1answer
116 views

Replacing the core of a solenoid to increase the pulling force

I have a number of solenoids I would like to use in a project. The problem is that they're not quite powerful enough so I've been trying to come up with ways to increase the their pulling force ...
1
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3answers
144 views

Why Does Flyback Current Destroy Darlington Buffered Op-Amp?

I am working on a project where I'd like to deliver variable DC control voltages to a continuous solenoid motor in order to achieve different velocities of actuation. To buffer my DC control voltage ...
2
votes
1answer
464 views

Driving a 24VAC solenoid with arduino using a octocopuler and a triac

Following a previous question I have redesigned my schematic: I'm trying to energize a solenoid used to open and close a 24VAC sprinkler valve I have the following questions : 1) The GPIO leg can ...
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1answer
223 views

Controlling a 24VAC solenoid with arduino

I'm trying to come up with a design for controlling a 24VAC water valve with an arduino. My current design : I want to use a BT1308W TRIAC controlled by an arduino pin to activate the vale, I'm also ...
2
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2answers
90 views

how do I make a solenoid operate after a random number of switch presses

New to the forum because I am stumped. Im building what I am calling the "water table" for my kids. It has a series of spigots, and channels that funnel into a kiddie pool. Then I got creative and ...
6
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5answers
1k views

Automated test for pushing a pcb mounted mini push button

We have a test that checks whether or a push button works or not, and as of now the test is done manually by hand. My question is how to do this automatically? We have considered using a solenoid to ...
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0answers
77 views

Solenoid control with current limiter - is it correct?

last year, I designed a solenoid control board which is still working very well. The board was based on ATmega328p and used an optoisolator 6N136 to isolate the high power from the low power and I ...
3
votes
1answer
228 views

0.5 tesla solenoid

Alright, I am supposed to make a solenoid (water cooled) having 0.5 T field at the center. The solenoid should be ideal so we are supposed to make the length of solenoid quite large as compared to the ...
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2answers
46 views

Alimented coil close to a passive coil

If I build a coil A, of 10cm height with iron core and a 4cm diameter, and alimented it with a DC 15v,6amp source, it will produce a magnetic field. Let’s say A is set vertically. Will building ...
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1answer
218 views

Not enough power going through IRLZ44, activated by Arduino

I've a 9v battery and I'm trying to get 9v through my IRLZ44, to power an solenoid. It's a seperate system from my arduino who's sending a 5v signal to the IRLZ44 in order to activate it. For some ...
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1answer
324 views

How do I use a hit and hold circuit with a solenoid?

Solenoids burn power when turned on and get hot, what is a way I can reduce the power while keeping the coil actuated?
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2answers
93 views

Power supply for a solenoid to open a secret compartment

I'm an avid DIYer, I don't know anything about circuits, meters, mathmatical equations etc. I have created a secret storage compartment so the door has no visible hinges, handles or locks, It's made ...
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0answers
30 views

Firing 8 Disposable Cameras Shutters via Solenoids

I've found an 8-channel SRD-05VDC-SL-C relay. The solenoids I am looking at are: Solenoid repelling 0.18 N/mm 2 N/mm 12 Vdc 1.1 W https://www.conrad.com/ce/en/product/502285/Solenoid-repelling-018-...