Questions tagged [solenoid]
An electromagnet combined with an actuator to convert electrical energy into linear physical motion.
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Why aren't solenoid/electromagnet windings insulated?
This has been bugging me for a long time. Take this video for example.
I have always thought that electricity will take the shortest path. When the electromagnet's windings are uninsulated, it seems ...
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Solenoid Driving Circuit
I'm trying to drive a 12v (14W) solenoid and have problems figuring out the components for the driving circuit.
The solenoid draws about 1.166A and the MCU is being operated at 3.3V.
I've seen many ...
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Driving Solenoids from Arduino
I was wondering what the best way to run a solenoid would be from an Arduino board. I was thinking about using a MOSFET that runs into a relay to turn on the solenoid but am not sure how to go about ...
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Are electric linear solenoids the best option to push a capacitive screen button on a smartphone? [closed]
I'm trying to figure out if electric linear solenoids are the best option to activate an interface element on the touch screen of my smart phone.
I have also heard of linear actuators and pneumatics ...
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Why doesn't an AC solenoid coil change magnetic polarity on each cycle?
I am trying to figure out how an AC solenoid coil maintains its N and S magnetic polarity.
Since in a sinusoidal AC, current alternates in both directions. How does the solenoid not change polarity (N ...
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555 timer in astable mode: How can I achieve longer low output than high?
I'm attempting to make a simplistic solenoid driver circuit using a standard astable 555 timer configuration with a TIP122 NPN transistor. The problem with the current circuit is that the output is ...
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Powerful electromagnet?
Is it possible to produce over 1000 lb of magnetic force over a distance of 4 inches(0.101 meters), using an electromagnet?
How difficult would it be? Explaining the general spec's of such an ...
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Connecting microcontroller 3.3V output to relay using ULN2803A
I have a need to connect an ARM micro-controller with 3.3V digital output pins to a few 12V solenoid water valves. I figured that I can use a ULN2803A for this task.
The internal circuit for each ...
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How do I use a hit and hold circuit with a solenoid?
Solenoids burn power when turned on and get hot, what is a way I can reduce the power while keeping the coil actuated?
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About misunderstanding of Lenz law
What I understand from Faraday and Lenz laws is that(I might be wrong): a voltage appears across an inductor when the current through it changes. And the polarity of that voltage is such that it ...
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What is the difference beteeen a solenoid's make current and inrush current?
Sorry if I'm just being noobish, but as I understand it, the make current is the maximum current that the solenoid can handle when switched on, but the inrush current is the maximum current it can ...
user174277
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My MOSFET operated solenoid circuit destroys my Arduino inputs
I made a series of PCBs to power some solenoid valves that use an external power supply. I switch them with BS170 MOSFETs using an Arduino as gate signal.
I based it a solution by Jason S.
This is an ...
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changing direction of solenoid
note I know essentially nothing about solenoids
I brought this solenoid thinking that I could use it to hit an object, but when I put it to a power supply, the only direction that it would go is down....
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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 ...
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What would a professional use to switch sprinkler solenoids?
As evidenced by several previous questions of mine, I'm working a project to design a sprinkler controller. This involves driving one of 16 solenoids (well, probably only one at a time...) based on a ...
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