Questions tagged [solenoid]

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

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20 views

ESP32 is stopping working

I am currently doing a project on automatic water level control. I have a solenoid valve and ultrasonic sensor. The solenoid valve needs 12 Volt to operate. So I have used a relay to connect it and ...
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1answer
56 views

PWM that can handle rapid on and off cycles?

I am working on a prototype project with a large electromagnetic solenoid. I want to be able to vary the strength of the solenoid via a PWM (preferred), or constant current. The issue I’m having is ...
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27 views

How to use solenoid valve with vacuum pump

I am a software developer working on small pick and place machine. I have bought mini vacuum pump and one solenoid valve. I want to control vacuum pump suction through solenoid so that when from ...
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1answer
63 views

How can I build a circuit to drive a 12V solenoid from a 3V source, so up 3V to 12V by storing in capacitors, charge and discharge cycles?

No electronics background, noob, but I want to drive a small solenoid to cycle it everytime I push a button. I wanted to use 2 AA batteries in series as they fit the size of my project well. I will ...
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2answers
72 views

Flyback Diode for 24V DC Solenoid

I am trying to select a diode to prevent my circuit from being damaged by the collapsing magnetic field from the solenoid in my circuit. Solenoid power will be switched off through the actuation of ...
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31 views

How to create optimal solenoid actuator

I would like to create a solenoid like this one: It should be powered by 5V and of course I want it to take as little current as possible. I know it will probably still take a current of around 0.75, ...
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105 views

Door lock solenoid with finger print & Arduino Nano

Update - 22.01.2020 Here is my schematic. I tried to use all of the comments guys below: Should I use a fly-back diode as commented after I cleared the schematic? If yes, where? Is it required to ...
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1answer
41 views

Circuit design and power management in an Arduino project with stepper motors and solonoids

I am working on a design for a Arduino driven project that controls a 1.7A stepper motor and 2 small solenoid valves. I am using a 12v power supply (Meanwell MDR-60-12) to power the stepper motor (...
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88 views

Is a rotor of an electrical motor charged with electricity?

This might seem to be dumb question, but as far as I understand it: An electrical motor is made of a rotor and a stator. The stator is electrically powered: it has a solenoid and current passing into ...
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1answer
72 views

How strong are eddy current brakes?

I really just need a rough estimation. How strong are eddy current brakes? For example, if I use a solenoid that has 800 turns with up to 2 amps going through it, and I have the not ferromagnetic ...
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102 views

With what force can a solenoid pull?

I am conducting an experiment, and a hugely important part of the experiment is a solenoid and an iron rod. If the solenoid has current going through it, and I place the iron rod so that it is not ...
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39 views

How does Solenoid works? How do I calculate its output power? [duplicate]

Here is a solenoid valve. It is a normally closed, which is mean, it is normally closed the valve. Vice versa, there is also normally open, which is mean, it is normally open the valve until it ...
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25 views

Capacitor to Retract Solenoid with Low Voltage?

So what I'm basically trying to do is have a push-button motor with a solenoid to open when powered but then close and abruptly stop the gears of the motor from turning. The issue right now is that ...
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2answers
120 views

Magnetic field of 2 solenoids

If I wound 2 solenoids with current in opposite direction (wound into each other like in the 1st photo) will I cancel the magnetic field ? Or did I made it stronger ? Is it better having a twister ...
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2answers
58 views

Magnetic force as a function of PWM frequency

Consider an experiement with a DC source feeding an coil with a constant DC current I. The coil with an iron core attracts a magnetic plate with mass m with force F. The force F is higher than Fm and ...
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1answer
86 views

How can we calculate the force of attraction between a coil and a ferromagnetic object?

As the question states I’m trying to figure out how I can calculate the force of attraction between the magnetic field of a solenoid (coil) and a ferromagnetic object. I suppose we should somehow ...
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1answer
35 views

Approximation of the resistance in a solenoid consisting of alternating sheets

I thought it would be a nice idea if a solenoid would use sheets instead of wire to increase the coil density. In the picture, orange parts are placeholders for copper and blue for an insulator. The ...
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6answers
163 views

Is there a switch that can be made when it is spun around a given axis, like a gyroscope solenoid?

Given in the title, I'm looking to design a small embedded system that only turns on when the part it's inside is spinning. The electronics is completely enclosed. I've done some googling for rotary ...
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1answer
58 views

Create a continous variable force on object

I have a component that I need to press to another component with ideally max 200 Newton of force. I want to be able to to control this force. E.g I should be able to have half the force or 1/10 the ...
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2answers
71 views

Drive Solenoid with RPi

I'm putting together this circuit, but am not clear how to wire up the part with the diode. This is what I have so far, but it doesn't seem right (how does the solenoid get power?). Components are: ...
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1answer
59 views

Can I work 30 of these Solenoid Valves from a battery?

The (30) solenoid valves are 12v, all identical, each controlled by a relay and are rated at 6.2 watts of power consumption. They will all be turned on simultaneously and turned off separately. This ...
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2answers
48 views

Power a 12V Solenoid and a RPi Zero with the Same Wall Socket

I'm building this circuit using an RPi Zero and this 12V solenoid. I would like to be able to power the RPi and the solenoid from the same wall socket using a single power supply. For example, I've ...
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8answers
304 views

Measuring the activation time of a solenoid

I'm trying to measure the activation time of a pull-type solenoid. When the solenoid doesn't have a load connected to it, you can measure its activation time through the current it consumes. At first,...
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1answer
50 views

Constant current source for an alternating magnetic field of varying frequency and constant amplitude from a solenoid

The project I am working on requires me to oscillate my sensor. I am doing this by coating a ferromagnetic material on the sensor and applying a sinusoidally varying magnetic field. I was applying the ...
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1answer
48 views

measuring ac voltage drop across a resistor with a solenoid in series with it

I wanted to measure the phase difference between the current (magnetic field due to the solenoid) and the system response. I am doing this by measuring the voltage drop across the resistor in series ...
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5answers
2k views

MOSFET broke after attaching capacitor bank

I have a solenoid that has a coil resistance of \$0.3\Omega\$ and accelerates a steel projectile here. I've posted the schematics below. Normal Version that acts as a control The GPIO8 goes to 5V to ...
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43 views

How to ontrol a 12v dc water valve with battery powered Arduino?

I just want to open/close a valve when the soil moisture sensor reports a pre-determined moisture level, using an Arduino. The main issue I'm facing is that most valves operate at 12/24 VDC and I'm ...
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1answer
95 views

Reverse engineering and reimplementing a garden hose water timer

I bought a cheap chinesse water timer with the idea of reimplementing the electronics to add Lora Radio managment so I can turn or or off the valve from a large distance and all running on batteries. ...
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2answers
97 views

Driving high currents with parallel mosfets as the switch

I am trying to make my own battery spot welder from a car battery, car starter solenoid, and an Arduino to drive them. I came up with my concept and schematic and built the thing. The problem is that ...
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1answer
95 views

LEDs and high currents

In smartening up my doorbell I've been playing with my illuminated pushbutton and have fallen into a bit of a rabbit hole. The doorbell normally: simulate this circuit – Schematic created using ...
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2answers
136 views

Contactor: when and how to use it

I hope my question is not too stupid. I'm controlling a brushed 48V 50A motor with a motor controller and I use two gel batteries as a power supply. I would like to use a low power signal to switch ...
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1answer
100 views

Using USB-6210, relay, to control a 12V double solenoid valve

I am kinda new for the wiring of the relay. I have read some posts in forum regarding connecting the solenoid valve to the DAQ. But I am still not too sure how it all should be done. My objective is ...
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173 views

Using transistors to switch 12v from a 3.3v signal

I'm a pretty accomplished programmer, but working directly with electricity is giving me the fits. I'm trying to replicate a design that switches a 12v/300ma solenoid based on a GPIO signal from a ...
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1answer
79 views

LTC3862-2 Step Up problem, output voltage drop

I'm designing a solenoid powering and control device which is centered around the LTC3862-2 Step Up controller (see datasheet). I have taken as a design start point the typical application shown in ...
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3answers
303 views

How does one position control a voice coil actuator?

I am looking at trying to position control a voice coil actuator (something like these). On the end of the voice coil actuator will be a small load (let's just imagine a 10 oz cube), screwed onto the ...
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0answers
40 views

Solenoid bolt retraction power

i am looking at getting a solenoid bolt like this for a project but the problem is alot of solenoid bolts that i have ordered can be retracted by pushing the bolt in manually so for example with your ...
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38 views

Voltage conversion to drive solenoid for drums

I'm new to electronics and this forum, so apologies if this is a dumb question. I'm trying to drive a solenoid from an undocumented/incomplete "Polyend Perc Pro" controller that I've got hold of, in ...
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1answer
84 views

12 V Solenoid Valve Not Opening

I am a chemical engineering student. I need to control a valve and pump system using an Arduino Uno. I was testing out my 12V DC solenoid valve with a variable DC power supply, and noticed that the ...
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48 views

Steel vs iron for linear solenoid plunger

How much more force would an iron plunger provide than a steel plunger? From what I’ve read it seems like it would be much better, but I have no idea where to buy an iron rod. Also, how much of an ...
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1answer
189 views

Solenoid switched by TIP120 transistor stopped working after two weeks

I have no kind of knowledge about these things. I just copied some instructions from different projects and now my project died. I have this 12V 0.8A solenoid that switched for about two weeks. Now ...
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1answer
67 views

differences between solenoid and voice coil

If I replace the movable iron rod of a push/pull solenoid with a movable permanent magnet, does that yield a voice coil or are there any further changes necessary for it to be a voice coil?
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3answers
456 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 ...
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2answers
382 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 ...
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5answers
2k 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
49 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 ...
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4answers
813 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
90 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
60 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 ...
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1answer
64 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. ...
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2answers
139 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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