Hi,
I want to use an Arduino nano to control the on/off status of the electromagnet, but right now I have no idea what steps should I do and other components that I need. so could someone help me, please!!
After looking through some posts, I am going to use MOSFETS as the switch to control the electromagnet on/off. However, I have no clue how to use this, someone can give me some clues please!!
Give us a link to the electromagnetic.
You would replace the motor with your electromagnetic in these circuits:
MOSFETs I have used with the Arduino:
https://forum.arduino.cc/index.php?action=dlattach;topic=445951.0;attach=373590
Thanks so much for your quick response!!
The electromagnet I am using is uxcell 5V 50N Electric Lifting Magnet Electromagnet Solenoid Lift Holding. I bought it from Amazon.
I am sorry, I do not understand what these circuits mean, so I need to choose one of them to apply to my board connection?
Circuit C1 should work for you.
Use an external 5v power supply to power the magnet; make sure you have a common ground to the Arduino.
What is the resistance of the magnet’s coil ?
TECHNICAL DETAILS
Nominal Voltage: 5V DC
Current Draw: 0.3 Amps at 5V
Holding Force: 5 Kg / 11 lb
Diameter: 25mm / ~0.8"
Center Diameter: 12mm / ~0.5"
Height: 20mm / ~0.8"
Lead Length: 280mm / ~11"
“ Electric time:Less than 7 minutes ;”
300mA is not that much current so most MOSFETs will work.
really appreciate your help!!!
actually, I am using Bluetooth module to connect with the Arduino nano, so I am wondering is that similar to control the LED status? to use high/low potential to control the D3 and other ports?
In circuit C1, a HIGH to the Gate turns on the MOSFET, the magnet would then be energized.
A LOW to the Gate turns the MOSFET off, the magnet would be de-energized.
Thank you so much for your help!!!!!
Really appreciate it!
I would say you need two things.
The first is one of these ready-made modules which makes the assembly a lot easier:
Aliexpress example
The second is a diode placed across the electromagnet according to the circuit pointed out previously. Unless you are using PWM, an ordinary 1N4001 (or 1N4004, 1N4007 etc) or equivalent will do just fine. 
Thank you very much for your advice!!
I would suggest you to go with FETs i.e. 75N75, thaat way you can control ON//OFF and can also generate the PWM pulse, although it will involve soldering. IF you are not gud with electronics then go for above mentioned module.
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