Questions tagged [solenoid]

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

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3answers
243 views

Solenoid actuates unreliable when driven through raspberry pi

I'm driving a solenoid from a raspberry pi zero W. The solenoid doesn't work reliable, sometimes it doesn't move at all. When I position the solonoid so that it points downwards (so that gravity helps)...
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1answer
615 views

Water Solenoid Valve 12 DC vs 220 AC

I want to buy some solenoid valves for watering system and attach it to Raspberry. I have choice of Solenoid valve with 12DC and 220AC. Is there any difference between them? I mean, maybe 220AC valve ...
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1answer
1k views

Open electronic lock with EMP [closed]

Would be possible open a electronic lock, like that used in door, through induction using an EMP device?
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1answer
372 views

Darlington Transistor Array Overheating and failure

I own some animatronic robots that use solenoid valves to operate their mechanical movements. Recently I created a pcb that uses three 8 channel Darlington Arrays ULN2803A to control the individual ...
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3answers
618 views

Electrocuting a fruit fly using magnetic induction

We are electrically inducing heart attacks in fruit flies to test the effects of various treatments on survival. We are shooting for roughly a 50% survival recovery rate in our control group. I work ...
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1answer
216 views

Best way to power a 110VAC solenoid

I recently purchased a 110VAC solenoid and wanted confirm the best way to power it (see link below): https://www.amazon.com/gp/product/B00DQ1MEVS/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 The ...
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2answers
1k views

Choice between transistor or relay

I'm working on a personal project for college right now. I'm working on a circuit that can change the direction of current flow going through a solenoid, depending on an input signal. I'm using an ...
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0answers
955 views

How to Reduce Current in Solenoid Coil

First time poster and electrical newbie here. First off I just want to thank everyone for helping create such a great and helpful forum! I've been lurking for years and have learned a lot here! I ...
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2answers
5k views

Choosing a Relay to Operate Solenoid Valve

I'm working on a project in which a solenoid valve needs to be triggered when a sensor detects a passing object. I have the concept and general design down, however I need some help with the specifics....
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4answers
7k views

Proportional Solenoid Valve + Arduino

I am thinking of buying a proportional solenoid (PVQ31) valve for a project. I thought of using Arduino to drive this valve but the issue is - this valve needs a range of current supply (0-165mA for ...
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3answers
5k views

how to increase the speed of a solenoid?

I'm working on a prototype of a small electric appliance. The part I need help with is a small box in which the floor needs to move up and down quickly to repeatedly bounce an object against the top (...
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1answer
130 views

Fast, long linear motion (about 60 cm/ 23 inches) [closed]

I'm currently researching a way to build a punch imitation (for boxing training) and for this i need a simple, fast (if it can be configurable great) and long linear motion which can handle a ...
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1answer
820 views

How can I drive 88 solenoids with an Arduino with PWM?

For a (crazy) upcoming school project I am converting a piano to be a computer-controlled player piano. I am currently planning on using solenoids mounted under the end of the keys (action side ...
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3answers
738 views

solenoid magnet - turns,volts,amps

I read this book called Practical Electronics for Invetors,and it says that one of the ways to increase magnetic field strenght of solenoid is to increase the current or increase the number of turns. ...
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1answer
3k views

How an AC electric magnet works?

I want to know how an AC electric magnet works since the polarity of an AC current changing 100 times in each second (for 50Hz mains supply) so its magnet polarity(N & S) also will changed 100 ...
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2answers
700 views

Solenoid Operation for Hours

My boiler is connected to a sun-water-heating system. After the sun goes down this system start to draw heat from my boiler. Today I'm manually closing the valve connecting my boiler to the system. ...
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1answer
61 views

Few Q's on solenoids [closed]

Sorry, this is not what I usually work with, so I'm kinda n00b on this..pardon my lack of knowledge and understanding. We have been having several issues with a few rather big solenoid on an ...
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3answers
3k views

Can we use 220V/60Hz Solenoid on 220V/50Hz supply?

Does anyone have experience of using 50Hz 220VAC for solenoid valve specified for 220VAC/60Hz ? It definetely will work, however is it safe/reliable in the long term? The model of solenoid is ASCO 307 ...
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1answer
99 views

How do you properly test for a bad solenoid?

As a sidebar to this other question, how do you properly test a solenoid? The resistance is within spec, could a solenoid fail in ways that still show the normal internal resistance?
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1answer
174 views

Designing a switching system for solenoids on Raspberry Pi

As part of a project I'm working on, I'm having a Raspberry Pi GPIO pin activate three solenoids, but the pin itself does not supply nearly enough current (each solenoid requires at least 1A, close to ...
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2answers
104 views

Arduino - component selection for controlling high-powered solenoids

I’m trying to replicate the circuit in the below diagram with a solenoid drawing 1.85A at 36V. First question: I think the TIP120 transistor should be fine, as it can handle switching up to 60V ...
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3answers
1k views

Which of the following methods should I use to actuate a solenoid from a microcontroller?

I've been studying the PICAXE microcontroller as a driver for a set of three 12VDC solenoid valves (though I may choose the 24V models). For reference, the controller will use a temperature sensor to ...
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1answer
68 views

measure temperature in a solenoid without sensot

is possible to meassure the temperature change in solenoid , without using a sensor? I know the resistance will change with temperature, but are other parameters affected also ? will my current ...
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1answer
151 views

24v DC solenoid coil with LED indication getting failure sometimes in reverse polarity

I am giving power supply to 24 v (DC) solenoid coil plug with LED, positive from pnp transistor board and negative directly from the smps. when the pnp board energise the output terminal, the coil ...
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1answer
389 views

Would a multi-stage linear solenoid work?

A common issue with small linear solenoids is that the stroke length is rather short. I'm pretty sure that increasing the stroke length would require increasing the strength of the magnetic field ...
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2answers
1k views

Suggestions on board designing, ground plane and layers - PCB images

I'm designing a board (with EAGLE) for my first time and, before posting here, I've read some topics and documents on how to design a board, but I still need help since I'm a beginner. My board ...
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3answers
659 views

Switching between +9V and -9V (using 5V logic)

I got some linear actuators today and found out that when I give them +9V they extend and -9V makes them contract. This is easy enough to test by hand, simply by wiring the actuator up to the battery ...
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1answer
533 views

(idle) energy consumption motored valve vs solenoid valve?

For my use case, shutting off/turning on a water flow of to my heading system I can buy two different type of valves, mototed ball valves and solenoid valves. Most of the time the valve (either option)...
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1answer
252 views

Is my schematics correct? (Atmega328p for solenoids control)

Finally I finished the second version of my circuit which should control different solenoids. You can view the large version here. In particular, this circuit should control 2 proportional solenoids ...
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2answers
609 views

The induced-emf formed in a solenoid connected with a battery

When a solenoid is connected with a battery and then the circuit is switched on, there would be an induced-emf, and after some time, this induced-emf will vanish when the current reaches maximum value,...
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2answers
349 views

Good method to provide small additional voltage while on battery?

I have a circuit that drives solenoid lock rated @ 9V as shown below. The circuit works when the power is connected to the wall, which gives a constant 9V DC to Solenoid Power V+. I also have a ...
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1answer
1k views

Ic driver for a N-channel MOSFET

I designed the first version of a PCB board based on atmega328p to control 2 proportional valves (valves specs: V = 12Vcc, R = 3.7 Ohm, I = 1.80A, PWM 120Hz). Currently, I'm using a FQP30N06L (...
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5answers
8k views

Can a linear solenoid be as efficient as a brushed motor with a gearbox?

I've heard that linear solenoids are power-hungry and tend to overheat, especially if the stroke is long. Can a linear solenoid be as power efficient as a motor with a gearbox that converts rotary ...
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4answers
490 views

How to improve atmega328p board for solenoids control

I'm designing a board based on atmega328p microcontroller in order to control some solenoids valves (2 proportional solenoids and 9 ON/OFF solenoids valves). This is the valve datasheet. These are ...
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3answers
268 views

Using PIR 3.3 V 0.33 mA to drive 12V 4A valve coil

I've been looking at ways to drive a 4 A, 12 V solenoid valve from a tiny, 3.3 V, 0.33 mA (max) current output from a PIR module. Whatever I try (MOSFETs, transistors etc), there never seems to be ...
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0answers
209 views

Protection High side Mosfet driver with less solenoid connection

I suggest control solenoid. Solenoid will be connected externally via a connector. Steering is via high side MOSFET driver. The requirements are for detecting disconnection, short circuit and current ...
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2answers
585 views

Atmega328p resets and crashes when powering up solenoids

I'm having problems with my PCB board based on atmega328p microcontroller (very similar to an Arduino standalone board). This is my current PCB schematics and Eagle board. SCHEMATICS UPDATED! I use ...
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6answers
1k views

Contact sparking even with flyback diode

I'm building a circuit to measure both voltage and current given to a solenoid valve 24V DC 15W. In parallel to the valve is a voltage divider with 470k + 100k Ohm resistors. In series with the valve ...
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2answers
428 views

pass 120v through 12v control solenoid [closed]

I want to remote control the power going to a water heater on a boat - the water heater is 110v and the remote control voltage is 12v - can I use a 12v continuous use solenoid to pass the 120v - I am ...
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1answer
421 views

How to calculate the induced voltage of two electrically isolated coils (solenoids)?

Suppose I have the following setup: suppose then that: Self inductances L1,L2, the radius R, the number of windings (turns) N1, N2 are all given. V1 is given. The distance between the coils (...
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3answers
2k views

Controlling air pressure solenoid

I am needing to create a system which will control air pressure (0-50psi). I have found what I'm thinking I need here. It is a solenoid air control valve which uses 12vdc. The specs state that the ...
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2answers
503 views

why is the outside of an electromagnet not magnetic?

On the electromagnet (5 Volts DC, built upon a transformer core) setup pictured below , only the core part is magnetic (when powered, it attracts a piece of steel) but not the 2 "wings" outside that ...
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4answers
3k views

Should I use a permanent magnet inside a solenoid for an electromagnet shuttle?

I'd like to make some kind of actuator/vibrator but much stronger. I thought of using a static, tubular solenoid, driven with AC current. Inside it would be a mobile permanent magnet cylinder (...
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2answers
356 views

Is it possible to drive 120 solenoids from 120 outputs of shift register 74HC595?

I want to drive 120 solenoids from 120 shift register outputs. I am driving solenoid by using TIP120 Transistor. When i connect all the solenoids Shift register circuitry heating.
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1answer
170 views

Figuring out how to power a solenoid

I have a solenoid with unknown specifications. I have contacted the manufacturer, but they are reluctant when it comes to sharing information about this product. The problem I need to trigger a ...
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3answers
107 views

Is it possible to use a coil to create sustained displacement/preasure? without a permanent magnet?

So, as far as I understand, speakers are basically coils coupled with permanent magnets, then when a current is run through the coil it creates a magnetic field, pushing out against the permanent ...
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1answer
394 views

H-Bridge and bi-directional solenoid

I am having a problem trying to operate a bi-directional solenoid from a RaspberryPi by using an L298N H-Bridge. I am sure it’s a misunderstanding on my part but I hope someone can help me! The ...
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5answers
10k views

Inductor in-rush current

The inductor equation V = L(di/dt) shows that inductors will resist instantaneous changes in current. Thus, they can be used as in-rush current limiters in power ...
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3answers
100 views

Voice Coil/ Solenoid driver

I am trying to figure out how to drive a solenoid/voice coil at 3V and 400-1000mA with a reciprocating output (forwards and reverse current) at around 50Hz as cheaply as possible. I have built some ...
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1answer
360 views

Is the 555 necessary here, or can I just use an op-amp?

Context: The circuit's main input is a line-level audio signal from a computer. Every time that something loud happens in the audio, I need the solenoid to activate for about 100 ms. The first ...

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