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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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Sprinkler controller couples electrical noise between stations, firing wrong solenoid

I've been trying to troubleshoot a Toro DDCWP 4 battery-powered sprinkler controller which started exhibiting strange behavior this summer. This is a basic four-station controller paired with RainBrid ...
Luke Soasey's user avatar
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23 views

Should solenoid be connected to NO or NC terminal of RF remote to retract plunger end off of edge of tiny spring-loaded door so it can snap closed?

Remote-control nestbox bird trap. End of solenoid plunger will rest on edge of the tiny, spring-loaded trap door to hold it open until remote control is used to trigger solenoid to retract, releasing ...
moabird's user avatar
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2 votes
1 answer
40 views

does rf remote transmitter power affect solenoid strength

Remote-control nestbox (bird) trap design calls for one 9V battery (pack with switch) boosted to 12V with MT3608 module to power 12V 433Mhz RF remote receiver, which is connected to a ZEY1-0530 ...
moabird's user avatar
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1 vote
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Ring Video Doorbell / ghost rings with 16 VAC solenoid chimes [closed]

I have: Ring Video Doorbell (x4) solenoid chime operating on 16 VAC The chime is a pre-2000's analog device. Presumably it uses an analog circuit to ring the solenoids in a pattern to make a ...
user3533030's user avatar
1 vote
1 answer
69 views

Did I draw my circuit diagram correctly for 2 MOSFETS and a solenoid?

My project consists of one 5 V solenoid (but uses 3.3 V), one voltage regulator (5 V to 3.3 V), one diode, two N-channel MOSFET transistors, and one 5 V LED strip, all controlled by a Raspberry Pi ...
alxzhu's user avatar
  • 31
0 votes
1 answer
36 views

Issue controlling MOSFET with PCF8575

I'm currently trying to control an array of MOSFETS so I can drive several solenoids. I'm using the Boron from particle.io as my main board, the PCF8575 as my I/O expander, the MAX3004 as a level ...
David O's user avatar
4 votes
4 answers
1k views

Can a slanted magnetic field be created with this insulated stranded wire arrangement?

I am considering building a small-scale experimental coil gun because I have an idea of how a magnetized projectile could be rotated while it is traveling through the coil(s), similar to how a bullet ...
user57467's user avatar
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-1 votes
2 answers
108 views

Did I draw this circuit diagram correctly for 2 MOSFETS? [closed]

Did I draw my circuit correctly? My project consist of one 5 V solenoid (but uses 3.3 V), one voltage regulator (5 V to 3.3 V), one diode, two N-channel MOSFET transistors, and one 5 V LED strip all ...
alxzhu's user avatar
  • 31
2 votes
2 answers
182 views

H-bridge with two logic-level GPIOs drawing high current

I am working on controlling a bi-stable latching solenoid with an H-bridge. The microcontroller that I am using for my project doesn't have enough GPIOs for me to use four pins for the H-bridge, so I ...
sdolan's user avatar
  • 113
0 votes
2 answers
77 views

Why is this Zener across the collector and emitter of this transistor driving a solenoid coil?

I am trying to understand a vintage (1970s) impact printer circuit. Each of the pins in the printer are driven by a small individual coil driver circuit, that was originally specified to look like ...
BZo's user avatar
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3 votes
2 answers
706 views

Why is this zener in series at the base of transistor, and has something failed?

I am debugging an ancient little impact printer and in my probing have found an unexpected voltage level. I'd like to understand this part of the circuit, why it's constructed as it is, and whether ...
BZo's user avatar
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7 votes
1 answer
205 views

Equation for the force created by a solenoid

I'm trying to make an electro-magnet and I want to figure out what core and wire I need using math instead of trial-and-error. I want it to produce ~1.5 newtons of force at ~1.5 inches from the magnet....
Ombrezz's user avatar
  • 173
0 votes
3 answers
147 views

Issue with solenoid valve sparks despite using two 1N4001 flyback diodes [closed]

As a student, I'm currently working on a science project where I intend to connect a 12V, 2A solenoid valve to a relay and subsequently to a Raspberry Pi Pico. The solenoid valve is powered by a 12V, ...
Tanmay Sonar's user avatar
0 votes
1 answer
86 views

How do I read the specifications on this DC contactor?

This is a solenoid from an Italian made marine windlass. Could you please help me understand the specifications written on it? From what I know, the coil and connector is 12V because that is the ...
Alexus's user avatar
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0 votes
1 answer
32 views

Linear Solenoid Pulsed

I have this part from RS: https://docs.rs-online.com/4238/0900766b81679254.pdf. I understand quite well about why the solenoid can output more force (given same distance) or have higher power input (W)...
user139731's user avatar
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0 answers
106 views

PCB layout/schematics of solenoid lock control - Problem - uncontrollable unlocking

I have a problem with opening solenoid locks. Sometimes, immediately upon connecting the power, and other times after about half an hour or even an hour, the locks start to open uncontrollably. I have ...
douce's user avatar
  • 71
0 votes
1 answer
107 views

Is my PCB ready for PWM solenoid control?

I am looking to upgrade my project to handle "back EMF" from solenoids when used in PWM mode in combination with MOSFET. The original project lives on a breadboard, and I am attempting to ...
underflow's user avatar
0 votes
3 answers
250 views

Inductance of solenoid with solid metal core

Consider the solenoid/inductor like in the picture. There is an air gap between the coil and the inserted solid metal. The solid metal is from aluminum or copper (Both have a relative magnetic ...
Fan's user avatar
  • 39
0 votes
2 answers
71 views

How to get a smooth operation of multiplexed solenoids

My project involves 100 small solenoids, that I either have drive individually, or hopefully I can drive in a multiplexed configuration, the same way LED displays are driven. Then I only need 20 ...
Björn Morén's user avatar
3 votes
2 answers
344 views

Problem driving solenoids with an IRF540 power MOSFET

I am using an IRF540PBF power MOSFET to drive a solenoid with 24VDC which works beautifully. When I try to drive a stronger solenoid the MOSFET gets stuck in the on position until I power the system ...
Daniel's user avatar
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1 vote
0 answers
116 views

Testing a 24V motor - Can I simply connect posts to a 12v battery?

I need to test if a 24V motor works or not. How can I test this just to make sure it functions? Is it possible to simply connect a 12V battery to the 2 motor posts and see if it spins, then reverse ...
RocketManZ's user avatar
1 vote
2 answers
87 views

Driving 12V hand wound solenoid using PWM

I'm trying to drive a hand wound solenoid (140 turns of 0.8mm enamel copper wire, 4cm long) with a 12V/2A power supply. I need to control the intensity of the force generated by the solenoid, so I'm ...
Christian Marotta's user avatar
0 votes
2 answers
111 views

Solenoid fails under PWM control

I have a 12V solenoid rated at about ~6W and 40kg pull. I am controlling it using ESP32, IRLB8721PBF logic-level mosfet. MOSFET gate-gnd is also connected using 0.5W 5.6V zener diode. ESP32-gate is ...
underflow's user avatar
1 vote
1 answer
112 views

Finding the ideal parameters for a homemade electromagnet

I am making an electromagnet and I was watching some videos on designing one. I just have some misunderstanding about power calculations of electromagnets and I have some questions about it. Q1) 1.1) ...
zoghii's user avatar
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0 votes
2 answers
87 views

Am I using these MOSFETs correctly?

I am designing and testing a circuit that charges a capacitor to around 50V using a boost converter when 'ARM' is high, then discharges it through a solenoid when 'FIRE' is high. ARM and FIRE are ...
Epix's user avatar
  • 27
1 vote
3 answers
104 views

Maximum safe wattage for solenoid and duty time

Please can somebody put my mind at rest? I work on a machine that is unpowered until fully assembled and it has a push-pull solenoid (195222-237). It has become apparent that we need to cycle this ...
Derick Roche's user avatar
1 vote
2 answers
228 views

What capacitance would I need to actuate a solenoid?

I have a project that requires I hit a 5 cm ball with a push-pull solenoid. For the purposes of the project the solenoid needs to be actuated using a capacitor, but after reading multiple forums, I am ...
Hugo Guerrero's user avatar
0 votes
0 answers
22 views

How to connect a solenoid to the Adafruit Feather M0 Bluefruit LE

How would I connect the to the Adafruit Feather M0 Bluefruit LE to this Mini Push-Pull Solenoid - 5V so that I can via bluetooth send over instructions to the microcontroller to control the solenoid?
Alexandros Eghoyan's user avatar
2 votes
2 answers
156 views

Does winding a solenoid around a copper pipe reduce the net magnetic flux at all?

I want to wind an air core solenoid around a copper tube. One end of the solenoid is soldered to the copper tube. (See picture above). Will a magnetic field be induced in the copper tube that cancels ...
James Strieter's user avatar
0 votes
0 answers
73 views

What kind of relay / switch is this?

What kind of relay, if I'm right, is this? It is used in a PRCD. Pictures from 3 sides.
Teb Ara's user avatar
1 vote
1 answer
66 views

Different types of linear solenoids

I want to use a linear solenoid and there are different types, pull, push and pull/push. So I chose a push solenoid for my application and saw the following picture. I know that the plunger goes ...
tijnvr's user avatar
  • 85
1 vote
0 answers
102 views

Proper circuit for a solenoid being triggered by a relay with occasional misfires

12V relay question… I built a homemade pinball controller for my PC using a standard, 5 V USB encoder for the controls. I wanted to add some haptic feedback, so I decided to add a few 12 V solenoids ...
KillerQ's user avatar
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0 votes
1 answer
71 views

Optimizing Solenoid Control Circuit with FETs: Minimizing Inrush Current and Hold Current Precision

I'm creating a circuit using two FETs. The first FET (U2A) is responsible for controlling the inrush current of the solenoid, and the second one (U2B) is used to maintain the predetermined hold ...
mastermind's user avatar
0 votes
0 answers
58 views

Noise spikes with optoisolated circuit driving 12VDC solenoid valve at 6.6 Hz

I have an existing circuit that drives a 12VDC solenoid valve on and off at ~6.7 Hz, 75ms on, 75ms off. This entire system is DC. The Beagle GPIO logic '1' level is 3.3VDC, and the BeagleBone is ...
WalterCEden's user avatar
10 votes
3 answers
1k views

Why did the Lucas voltage regulator use rectangular section enameled wire for one of the windings?

In the 1930s and subsequently, Lucas supplied a car voltage regulator of the twin bobbin type. A detailed description of how it operated can be found here, but in summary, one solenoid operated a cut-...
Gus's user avatar
  • 109
0 votes
4 answers
126 views

I have a solenoid rated at 24 volts AC, but at a trickle voltage of 1-9 volts the solenoid stays pulled in when it shouldn't be

I have a solenoid that pulls in at 24-30 volts ac to control water flow. It opens at 24 volts ac, but stays pulled in at a trickle voltage of .75 -1.0 volts. How can I stop this from happening?
doctortom44's user avatar
0 votes
1 answer
48 views

Relationship between RMS-current and energy stored in a solenoid

Regarding the formula for energy stored in the magnetic field of a solenoid (U=1/2LI^2), I presume that the RMS value for an alternating current could be used for the I-value. Is this correct?
proton's user avatar
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0 votes
1 answer
199 views

Diode in parallel with AC solenoid valve

I have a circuit I'm trying to design to fire both 120VAC and 24VDC solenoid valves. We have relays that work on 12vdc for the coil, and can switch AC or DC. the valves are normally around 30W. I ...
Austin Fox's user avatar
1 vote
1 answer
545 views

Modelling solenoid with LTSpice

Does anyone can give me a hint on how to modelling a solenoid (solenoid locker) with LTspice ? Here is the characteristics from the supplier (https://www.lextronic.fr/mini-serrure-solenoide-12-v-58746....
Jessay's user avatar
  • 21
3 votes
1 answer
367 views

How can I build the attached circuit diagram in a bread board?

How can I build the attached circuit diagram in a bread board? I've procured all the mentioned components. The components I have are: BLM5 Solenoid, Vishay 100V 3A rectifier diode, Welwyn 39Ω wire-...
HARI LAKSHMAN's user avatar
0 votes
1 answer
162 views

Is this (working) 2-doorbell system dangerous?

In a previous setup, I had two doorbells, each one with its own 10V AC transformer, as detailed in Why is it impossible to connect these two doorbells in series or parallel?. I now know it was ...
Basj's user avatar
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7 votes
3 answers
2k views

Why is it impossible to connect these two doorbells in series or parallel?

I have: one 220 V AC -> 10 V AC transformer one push-button switch (at the door) two bells for two different places of the house; they should ring together when the (single) door push-button ...
Basj's user avatar
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0 votes
0 answers
55 views

How does this motor work?

I have been on a bit of a quest to find some sort of linear motion device to compress a spring with 15kg of force 80mm at 1600mm/s, with continuous duty cycle, ideally under $40. So I was digging for ...
Yassin's user avatar
  • 43
0 votes
3 answers
127 views

Linear Motor Design

I previously uploaded a question on trying to make a solenoid attract a magnet 80mm away, however this ended up being an impossible ask due to solenoid's having a max effective attraction distance of ...
Yassin's user avatar
  • 43
0 votes
0 answers
22 views

How to operate and choose the right components to control an industrial pull and push solenoid using an Arduinuo?

Push/Pull which has a 24 V DC power supply and power consumption of 23/85/400 W. What transistor and diode configs I should be going for?
HARI LAKSHMAN's user avatar
0 votes
1 answer
163 views

Strong Compact Solenoid Design

I have a spring that I need to compress 80mm. To do so requires approximately 15kg of force. To compress the spring, I will have the spring in front of a piston head. The piston head will have a ...
Yassin's user avatar
  • 43
0 votes
2 answers
437 views

Solid state relay driving an inductive load

I want to drive several irrigation solenoid valves with solid state relays. The solenoid in question is a Hunter model 606800 24V AC device. Its specifications state 370mA inrush current and 210mA ...
jox956's user avatar
  • 1
0 votes
1 answer
80 views

Understanding Solenoid Datasheet

I have a 3/4" tubular pull-type solenoid from Magnetic Sensor Systems, model number S-15-75-24. The datasheet can be found here: http://www.magneticsensorsystems.com/solenoid/tubular/s-15-75.asp ...
OldPartsNewLife's user avatar
0 votes
1 answer
72 views

What kind of solenoid is this?

My electrical water timer broke, and interested to see its inside I opened up and found this (image) solenoid. I'm not sure what type it is. The whole thing runs on 2xAA (2x1.5V) batteries, but it ...
u314's user avatar
  • 3
0 votes
1 answer
33 views

Turbocharger Electronic Valve Control

I have seen that the H bridge method is used to drive the valves required to use the turbocharger feature in the engines, why do they prefer this? There is no DC motor, they open and close an ...
Eng's user avatar
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