Seeeduino+Grove electromagnet

Arduino, Seeeduino Serials and mutants. Share your problems and experence on arduino compatible board such as seeeduino/stalker, etc.

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gauravsuri100
Pre-kindergarten
Pre-kindergarten
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Joined: Mon Mar 21, 2016 10:48 pm

Seeeduino+Grove electromagnet

Post by gauravsuri100 » Sat Mar 26, 2016 3:36 am

Hello - I am looking to control multiple electromagnets with a Seeeduino v4.2 board. The Grove electromagnet has a working voltage of 400 mA but the output of the Seeeduino board is only 40 mA. I am considering two options:
1) Using the DC outputs on the Seeeduino board to drive the Grove electromagnets. However, I can only control one electromagnet per board. I could use multiple boards.
2) Pairing the Seeeduino board with a SeeedStudio - Motor Shield V2.0 board - which gives me the capability to control two electromagnets. Is this option feasible or am I missing something?
Any other suggestions? I am relatively new to all this and do not fully understand the nuances of electrical circuits.
Thanks
-Gaurav

shivamgautam1
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Re: Seeeduino+Grove electromagnet

Post by shivamgautam1 » Sun Apr 17, 2016 1:01 am

Hello Gaurav! I'll suggest you to use transistors instead. Use transistor as a switch. By using a transistor as a switch you can power your electromagnets from an external power source (eg. 9v battery). Connect the emitter of the transistor to the ground (Common to ext. source & Seeduino). The Electromagnet connected in between the + terminal of the source and collector of the transistor. Connect the base of the transistor with the digital output pin on seeduino through a 10k ohm resistor. Even the low current provided to the base would be enough to trigger your electromagnets.

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