Questions tagged [solenoid]

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

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51 views

Arduino and solenoid with a single power supply

I am trying to create a small project involving controlling a solenoid via an Arduino Uno clone with a single power source. I currently have it set up to power the Arduino with a power adapter rated ...
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112 views

Solenoids draw way more current required

I have these 12 V solenoids from China. I am using 6 in parallel and since each requires 300 mA, their effective resistance is about 6.67 Ω. This means the current required is around 1.8 A and should ...
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50 views

The optimal PWM frequency of this proportional solenoid

I have to PWM control this proportional solenoid particularly "GP8 036 A59/150" that works on 12V. I tried from 200Hz to 20kHz - it seems that it accepts any PWM frequency with no overheat ...
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75 views

Electromagnet force and magnetic permeability

In a cylindrical core electromagnet, Magneto-motive force (MMF) = 613 At Magnetic strength (H) = 15345 At/m I am using an iron core with 10% silicon in it, so the saturation magnetic flux density of ...
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68 views

How to drive this solenoid + littleBits?

I have a 5V solenoid, and I am trying to power it from littleBits. I had a littleBits servo bit and cut its wires. The orange wire should be control wire. The reason I want littleBits is because I am ...
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88 views

Does a flyback diode have to be connected to the + lead of a solenoid, or can it go directly to the power supply?

I am designing a control box to switch 24V DC high speed solenoids at a max frequency of 200Hz. They will be controlled by an Arduino Mega through N channel, rfp30n06le MOSFETs. Here is a photo of the ...
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1answer
58 views

Special project elevator floor lamp

I am building a floor lamp made of vintage elevator directional lenses removed from an old hospital. The lenses are from the 50's. I want to simulate an elevator theme for this project. I have all ...
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2answers
90 views

Controlling relays with logic gates

Pretty new to electrical engineering world, so probably rather simple question. I´m designing control system for tractor trailer hydraulic system. The system is 12 V and solenoids what I am using ...
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1answer
78 views

Can back EMF from a solenoid trip a circuit breaker?

I am working on an ignition circuit right now in a Cessna 172, the issue is that when the ignition switch is turned to engage the starter, the circuit breaker supplying power from the bus through the ...
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32 views

Solenoid force output and stroke distance

I have a question about the forces a given solenoid can really output. While I can find literature about the forces that are being exerted in a given point in space by the plunger I'm questioning if ...
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69 views

Finding out the magnetic field inside the cross section of the torus which is wrapped by conductive wire and the current flows it

As shown in the diagram , the torus of radius of \$~ R ~\$ exists . The wire is wrapped around the torus . $$ N:=\text{total number of the turns of the wire around the torus } $$ The current is ...
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35 views

Scale up current of a pick and hold solenoid drive IC

I am trying to help to salvage a design that doesn't meet a new specification. Circuit needs to drive a solenoid in relatively common fashion: High current pulse to actuate followed by reduced hold ...
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54 views

\$\delta n \cdot x + n \cdot \delta x~\$ equation of shrunk coil with incremented number of turns per unit length

The very long coil exists with the following information . $$ a:=\text{radius of the circle of the coil} $$ $$ n:=\text{number of turns of the coil per unit length} $$ $$ x:=\text{lenght of the ...
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109 views

Can I trigger a latch solenoid valve using a stepper motor driver (A4988)?

I would like to turn on/off a solenoid valve like this one: CLABER 90812 From what I leaned googling around, it seems that it requires a positive/negative pulse to turn it on/off. In practice, I need ...
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43 views

Problem with Amp Turn calculations for electromagnet

I'm attempting to design an electromagnet, and the equations seemed to produce an nonsensical result. The electromagnet needs to impart 42.75 newtons at 0.0015875 meters. I needed to discern the Amp ...
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65 views

Stop 'bouncing' input from float sensor

I'm trying to resolve an electro-mechanical issue to do with a water fill solenoid, that is triggered by a float valve. The problem is as the water approaches full, the float bounces causing the ...
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1answer
32 views

Supercapacitor Solar Cell Locking Device

I am trying to use a solar cell to power a locking device. The solar cell being used is a custom 10W 9V. It charges a lithium ion battery which is used to power an MCU and a couple of other things (...
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33 views

Solenoid Train - Best approach for magnetically guiding an object along a path?

My project is to pull an object along a path with solenoids, by cycling their on/off state. I don't know if ferrous core solenoids pulling steel would be more efficient than pulling a neodymium ...
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76 views

Is a run-time adjustable boost converter possible?

I have a power supply that ranges from 12V-30V. I want to power a set of 4 (24V, 1A) solenoids in series. I also want to use a reduced hold current. So, I'm looking for an output of 96V for a time (~...
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65 views

Is it possible to read the value of a switch in another active circuit?

I have a magnetic lock with an integrated switch (NC when locked). The lock opens when supplied current and stays open even after the current is no longer supplied (until someone manually closes the ...
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81 views

Right capacitance for a capacitor parallel over power output?

I am building a self playing piano. I daisy-chained 11 74hc595 shift registers to control (11*8) solenoids. (figure 1 only shows 1). The solenoids are rated at 2 Amps each. I use SPI from the arduino ...
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1answer
63 views

Isolating the solenoid and driving relay power supply

I am using a relay module to drive a solenoid based on the output from my micro-controller which provides 5v signal. Following is what the circuit looks like: My objective is to hook up both relay ...
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77 views

What are the benefits of a solenoid over a relay in an electric cart?

I was looking over the wiring diagram of a Electric Golf Cart and noticed the use of a solenoid. The initial literature I found suggest that the solenoid is only engaged when the key is in the engaged ...
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52 views

Solenoid Actuation Circuit for Hocky Robot - High speed, Maximum force

I am working with students designing and building small competition robots. We have done quite well but I am having trouble with the design of a circuit to actuate a solenoid to quickly launch a 4 ...
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43 views

LED Driver Circuit for controlling solenoid valve?

I have a project where I am trying to control the position of a solenoid valve. The valve operates at 12V, 0-2A (0 = close, 2A = open). The system is open-loop and needs a fast response circuit. I ...
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88 views

Imagine having a broken radio transmitter, and I need to make it work by building a solenoid with an inductance of 100 uH. How can I do it?

This is a problem made by my professor. Imagine having to repair a radio in a rural area, without any high-tech instruments, and I need to build a solenoid with an inductance of 100uH, a cross-section ...
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443 views

How to optimise wire gauge selection for electromagnetic applications?

Disclaimer: Hobbyist "maker" with limited experience and no relevant education. Please considerate and answer in detail. Feel free to skip to "Question". Context I have an ...
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1answer
74 views

Regarding solenoid valve

Can I only use one 12V DC power supply for two solenoid valves? I got connect the solenoid valves with a 5V 4 channel relay module with arduino as my microcontroller. Each of the solenoid valve is 12V,...
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1k views

My shift register is working when I use LEDs, but not a solenoid

I'm trying to operate a solenoid push pull motor with a shift register. It works fine with LEDs, but when I try to use the shift register to trigger my solenoid it doesn't work. I suspect it's a power ...
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1answer
64 views

555 Timer works perfectly until solenoid connected to relay then continuously triggers

Note: the solenoid text in the image is just a representation. Real world everything is fine until I connect the solenoid to the Com and N/O of the relay. It then cycles once and starts to ...
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94 views

Insufficient force from 6 V 1 A push-pull solenoid powered by a stepped down 9 V battery (relay) -- why and what can be done?

I am powering a 6 V 1A push-pull solenoid using a 9 V 1Ah rechargable lithium ion battery (form: 9 V alkaline) using a relay; the 9 V is stepped down to 6 V; controlled by Arduino. It is to be used as ...
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180 views

How to simulate magnetic field of a toroidal solenoid?

I am trying to simulate the magnetic flux inside and outside of a classic toroidal solenoid. The simulation must be able to simulate a toroidal solenoid with several densely wound layers of copper ...
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179 views

MOSFET as a switch failed after 200k cycles - root cause?

The following is a schematic for a solenoid that failed after ~200k cycles. I found that the MOSFET drain to source failed short. I am getting~ 26 ohms resistance. The way this circuit works is as ...
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41 views

How to get desired current on output of relay's module

I'm building automatic garden watering system using Arduino Uno 5V relay module - this one https://www.amazon.co.uk/2-channel-trigger-module-JQC-3FF-S-Z-RBTMKR/dp/B01NAJ67ML, here are technical ...
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73 views

Designing an electromagnet

I'm new to magnetics and apologize in advance if any of these questions are too basic. I'm looking to build an electromagnet array to move around an object placed on top of the array. Something ...
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91 views

Solenoid circuit not firing [closed]

I will try to explain as quickly as possible. I am trying to get the solenoid to fire, it is not. The relay however is clicking on command. I am recreating the circuit shown here https://www....
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51 views

Is it possible to drive an arduino nano and a 5v solenoid via usb?

So basically i want to make a clicker with a solenoid like an old school IBM keyboard. What i'm thinking is to put and arduino nano and the smallest 5v solenid i can find inside my keyboard and ...
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71 views

Running a solenoid pump with N-channel MOSFET

simulate this circuit – Schematic created using CircuitLab I'm trying to run a solenoid pump(L2 in the diagram) using a pulse generated by an Arduino. The pump is designed to run on rectified ...
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73 views

how to choose diode for PWM of high amperage solenoid?

I'm making a pulseable solenoid circuit via PWM at around 20 hz. THe solenoid is a heavy industrial type that pulls a whopping 18 amps. My snubber circuit gets hot and burns up as the current is too ...
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114 views

DC solenoid overheat protection

I got 40 DC solenoids (12 V, 2 A) and each solenoid may be turned on for max. 5 seconds every couple of minutes or even more. Does this implementation require that an overheat protection should be ...
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4answers
168 views

How to design a solenoid.?

I want to design a DC solenoid valve that could compress a spring under 5 kg of load. All I know is the voltage (12V), load (5kg), the current range (15-20), and the cross-sectional area of the ...
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47 views

No Current Flowing From 12v Solenoid Pins

I have recently designed my first PCB (forgive my poor understanding of electronics) and I'm having an issue with the pins that are supposed to be powering the 12v 2A solenoid. Everything works as ...
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79 views

Drive 12v solenoid from Raspberry Pi using transistor

I'm looking to drive a 12v solenoid from a Raspberry Pi's GPIO. I have been looking at using a S8050 Transistor, however have been looking at the datasheet and have been struggling to determine ...
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153 views

Use DC Motor driver for electromagnet

I need to control the force exerted by an electromagnet using an MCU. it's not a commercial item so I don't have any datasheet. Here what I know: resistance: 8,9 ohm may be powered up to 60V (with ...
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79 views

Use a transistor or MOSFET as a switch to control a solenoid [closed]

I am working on a project to control a solenoid (12 V/DC 12.96 W) with an ESP32. I have attached a circuit design as it is in picture. I have couple of questions: Would this circuit work properly? Do ...
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98 views

What equation should I use to calculate inductance of wire coil?

I've been working on a project recently which requires me to build an inductor, however in my research I found many different equations (with a range of variables used and giving very different ...
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65 views

Electronic door latch on a rocket

I'm working on a rocket project; we need to open a door to deploy the parachute. This door will be subject to great forces and must stay closed, until it gets the right signal. I have a few questions: ...
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62 views

Define the purpose of these components in the operation of this low side driver

I am trying to understand the operation of the following low side driver circuit I found in a schematic of an old pinball machine (redrawn for clarity): L1 is a Solenoid and Q1 is a Darlington BJT (...
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374 views

Connecting Solenoid (12v DC) with a battery source (12v 23A)

i'm a new bee and trying a DIY project with DC solenoids.  I'm having some basic (i hope so) with powering this solenoid - please let can you me know what is wrong with my attempt. Solenoid is : 12v  ...
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1answer
95 views

Switch 12v solenoid from 3v3 control signal

I am going in circles on the web and appreciate your help with this novice question, operate a solenoid with a mosfet (original idea, I know). I bought a Gravity DFR0457 to switch a 12V solenoid on ...

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