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Topic: Powering multiple servos (Read 1 time) previous topic - next topic


Oct 03, 2015, 07:47 pm Last Edit: Oct 03, 2015, 07:53 pm by frozenblaze1290
Hello, i have recently decided to make a robot arm. My idea consists of 1 stepper (for the base), and 4 servos(shoulder, elbow, wrist, and claw). I have a great code that take's 5 push buttons and gives me the ability to preform 8 functions with different key combo's. I have everything set up, but my issue is power. Ive read many forum's and none of them gave me the answer i need. How and what is the best way to provide strong stable power for 1 stepper and 4 servo's?

Servo's: http://www.amazon.com/TowerPro-SG90-Mini-Servo-Accessories/dp/B001CFUBN8/ref=sr_1_2?s=toys-and-games&ie=UTF8&qid=1443893994&sr=1-2&keywords=servo

Stepper: http://www.amazon.com/Arrela%C2%AE-4-Phase-Stepper-28BYJ-48-5V-ULN2003/dp/B00KKRN49M/ref=sr_1_2?ie=UTF8&qid=1443894227&sr=8-2&keywords=Stepper+Motor+28BYJ-48

Board: http://www.amazon.com/Arduino-Mega-2560-MEGA-R3/dp/B006H0DWZW/ref=sr_1_1?s=electronics&ie=UTF8&qid=1443894732&sr=1-1&keywords=arduino+mega


You might get an old laptop power supply and use UBEC voltage converters from ebay to power the servos and stepper. The UBEC is made for powering servos that use large current.
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Thats an option, but is there a way to take an input from the arduino wall adapter(like a power jack or something)? I have a buck converter, but i cant find good enough battery's for it, the servo's drain to much. any battery recommendations?


jack wp

If your device is stationary (can use wallwart power), then use a power supply that is ample in amps, and add a few capacitors, 0.1uf, and 10 uf.


Thanks for the advice, i was going to use the arduino wall adapter for power, but i couldn't find anything on ebay or amazon for a input socket like on the front of the uno and mega.


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wow, thats perfect! will it supply enough energy for 4 servos?

jack wp

If you run all all 4 servos at the same time, it may not.

If you need all 4 to ren at the same time, you may want an auxiliary batter pack  to help out.

If you can slow things down a bit in code ( only one running at a time 1/10 second each), then I think it should be adequate power.

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