Questions tagged [electromagnet]
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Swinging Magnetic Attracted to Batteries [closed]
I have a pendulum in which the Bob is a permanent magnet. The circuit and batteries are hidden inside the base. The problem is that the permanent magnet is attracted to the batteries and slows the ...
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What is the max voltage I can apply to an electromagnet? [closed]
I have a small Amazon Electromagnet 4 ohms of resistance and wound with 110 feet of 28 AWG lacquered wire. What is the maximum sustained voltage I can put through it?
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How to prevent power fluctuations on strong Electromagnetic Lock (2A)?
I'm learning how to control strong Electromagnet Lock using ESP32 microcontroller, but I'm having problems with board freezing at the end of relay activation. So the Lock works, but then the board ...
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How can I use a relay and diodes to reverse the polarity to a electromagnet?
I am trying to make a solenoid using a motor, relay, and 12-volt battery. I have everything working, but it only goes one way. I want it to reverse the polarity when the relay is open. Will it work if ...
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Where does the electricity in electromagnets come from if permanent magnets from generators decrease their magnetic strength?
The question has been puzzling me for some time, I presume electrical power starts from generators, the heat produced by them(generators) cause their magnets to weaken and electromagnets have to be ...
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Phase shifting 2 waveforms to create a rotating magnetic field
I'm trying to set up a rotating magnetic field with 4 electromagnets coils (2 pairs) arranged around a fluidic cell. I have read that you need to shift the 2 waveforms out of phase by 90 degrees to ...
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How to improve my son's solar bobble head [closed]
My son has a minecraft solar bobble head (in this case a bobble Steve). Under light it swings a diamond sword this exact one (Puckator Officially Licensed Minecraft Steve Solar Pal https://amzn.eu/d/...
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Designing a polarity-reversing electromagnet with energy recovery
I'm looking to design an electromagnet that changes its polarity by the trigger of a pulse signal, by considering the lowest energy drop, I am looking for a sub-system to reserve the energy of the ...
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Charging and discharging electro-magnet
I was using normal MOSFET to turn a 1.2 H+4.8 Ω electro magnet at 48 V and draw around 10 A. The MOSFETs are getting damaged after a few days. The MOSFET is just used as a switch (no continuous ...
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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) ...
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How is the holding force of this electromagnet so large?
I am designing a system that uses the magnetic force to fix an object in its place. I plan to connect an I-core to my object and fix it to a fixed C-core by letting a magnetic flux flow through both ...
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Electromagnet doesn’t have power [closed]
I have so problem with an electro magnet, I mean it seems a little weak to me. What could I do to improve it’s power? Battery: 3.7V 8800mAh
Also, I had the wires in small parts so that’s the reason ...
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Mixing power supplies with inductive loads
I have two unregulated power supply - 24V and 12V.
My board consists of digital components and sensors that require 3.3V or 5V.
All that electronics is resposible for electromagnets or DC brush motors ...
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Magnetic Field Produced By Electromagnet Perpendicular Winding
If I wound wire like a cylinder (blue) and then continued in a perpendicular direction like a toroid (yellow), what would the magnetic field look like?
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Wrong orientation of a diode destroy a circuit (Schematic included)
I get 24V from the barrel jack.
The electromagnet is controlled using PWM.
Here, I made a mistake and the diode direction is reversed. (The diode is placed to protect from back EMF.)
When I plugged ...
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