Questions tagged [solenoid]

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

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24 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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29 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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2answers
70 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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71 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
28 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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2answers
48 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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1answer
50 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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37 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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87 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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3answers
255 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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65 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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998 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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63 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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2answers
90 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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1answer
89 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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2answers
169 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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37 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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69 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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1answer
87 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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37 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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51 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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2answers
52 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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1answer
69 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
107 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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46 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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1answer
48 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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1answer
78 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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1answer
59 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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1answer
70 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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1answer
64 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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1answer
61 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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1answer
225 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
87 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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1answer
85 views

Logic Converter driving logic level Mosfet Gate

I am wondering if anyone can comment on the feasibility of this circuit. My ultimate goal is to switch a 12V solenoid on and off using a 3.3V microcontroller, but I have had trouble so far. I want to ...
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30 views

Variable Turn Density Solenoid

I am working on a medical device application and would like to use a solenoid with a variable turn density such that the force \$F\$ on a metal piston within the solenoid cylinder is not constant but ...
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0answers
70 views

Logic level mosfet wont drive solenoid

I am trying to find out why my current mosfet is not working by looking over the datasheet. Ultimately I am just trying to buy a mosfet that I know will work, but I want to understand the datasheets ...
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2answers
47 views

Turn on LED when manual switch ON only

The circuit consists of a 12V DC supply, there is a GPIO to turn on the solenoid rated at 12V 500mA. Also, a manual switch is there to turn on the solenoid when needed. The placement of LED and 1K ...
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1answer
38 views

Light up an LED on turning on circuit

I have a 12V DC power supply which would be connected with a solenoid and a manual button as shown in circuit diagram image below. The rating of solenoid is from 9V-12.5V. It takes 500mA at 12V. My ...
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1answer
43 views

Two pin PWM signal to control solenoid/electromagnet

I am building a whiteboard CNC pen plotter for my classroom out of some old 3D printer parts, a Melzi board running Ramps 0.92 and Inkscape to generate the Gcode. I have the machine up and running but ...
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1answer
69 views

How long can you power a solenoid? Is heat an acceptable way to check?

I am wondering how long you would expect a standard electromagnetic solenoid like this to be able to be switched on? Any first hand experience would be appreciated. If there is no data on this - is ...
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39 views

Control flow rate of a solenoid valve using PWM

I'm hoping to control the flow of chemical by shutting a solenoid valve periodically over short intervals, similar to this video: https://youtu.be/O49mqn33vBI?t=6 Does anyone know if conventional ...
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1answer
69 views

MOSFET not switching solenoid lock

I'm trying to actuate a solenoid lock with the following specifications from the vendor's page: Working voltage: 12 Vdc Starting current: 0.9 A Steady current: 0.12 A For this application, I'm using ...
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6answers
2k views

Using a PNP over an NPN to activate a solenoid

I am working on a circuit that controls a solenoid through the use of an Arduino. One question I had was if there was any advantage to using a PNP transistor over an NPN transistor? From class, I know ...
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1answer
69 views

Solenoid driver does not work reliably

I have to drive a solenoid with the following schematic: It works great but sometimes the MIC5020 or the input pin of microcontroller fails and can therefore no longer be pulled high, but I can't ...
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47 views

Controlled solenoid stroke length

Let me create a scenario to better illustrate the problem I have 1500 pens that I want to individually actuate upwards with 3 different distances, ex: 10mm/15mm/20mm I thought I could use a solenoid ...
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42 views

How far should circuit be from solenoid

I am creating a circuit which is controlling a solenoid valve and I was wondering what is a safe distance to keep this circuit from the solenoid valve. Circuit includes an ESP module and some other ...
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1answer
59 views

Charging Battery via solar panel to power a push action solenoid

This is my first project ever, I'm running into some problems with the power supply stage, I hope you could help! I want to power a solenoid (12v/2A), which will get its voltage from a battery (12V/...
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38 views

Requesting wiring feedback - Arduino/ESP32 solenoid/transducer, temp probe

2 questions: Can you please tell me if this circuit wiring is correct for the 3 sensors I am trying to connect to my ESP32? Is there a risk for EMI using the ethernet cable with these sensors/...
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1answer
68 views

Electronic components that can pull a string around 5cm and then suddenly release it?

I have very basic electronics knowledge. I'm looking to build a very simple circuit that pulls on a string which will start a pendulum swing. I was initially thinking using of a using linear solenoid ...

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