How to power 5 SG90 and 1 MG996R servo motor?

Other Hardware Motors, Mechanics, Power and CNC
1

Hi there,

I am currently doing a project for my wireless controlled robotic hand. I am currently using 5 SG90 to control my robotic finger and MG996R servo motor to control wrist movement. May I know is it suitable by using 7.2V 3500mAh battery to power the circuit?

How about I use total 6 MG996R servo motor instead of 5 SG90 + 1 MG996R servo motor? How many voltage and ampere of battery should I use?

Thank you for giving the solution, I really appreciate that.

2

SG90s are only specified for 4.6-6V so running them on 7.2V is not a good idea.

The MG996R is stated to be good for 4.8-6.6V so that is more likely to tolerate 7.2V but what type of battery are you looking at? Many rechargeable batteries reach much high voltages than their nominal voltage when fully charged.

If you can find a 6V battery that would be a lot better. At that voltage SG90s need about 0.6A each and the MG996R about 1.2A.

Steve

3

There is a lot of small and cheep step-down Module on the market. With one of this you can use your LiPo.

4

RudolfAtRTC:
There is a lot of small and cheep step-down Module on the market. With one of this you can use your LiPo.

There are not many small cheap converters that can handle the 5A (or 8A for 6 x MG996s) that's needed for all those servos. And 2S Lipos are usually quoted as 7.4V not 7.2V. 7.2V sounds more like 6 x NiMH cells which is why I prefer to ask rather than guess.

Steve

5

What about I use 3.7v 1500mAh LiPo battery to power 5 SG90 and 1 MG996R servo motor?
And what about I use 7.2v 3500mAH NiMH battery to power 6 MG996R servo motor? As I'm not sure what option I'm going to choose. Thank you for all your help and reply.

6

Personally I'd use a 6V (5 cell) 3500mAh NiMH battery in either case.

Steve

7

Or a 2S 6.6V LiFePO4 receiver pack?

8

MarkT:
Or a 2S 6.6V LiFePO4 receiver pack?

7.2V fully charged. Pushing your luck a bit with SG90s (4.8-6V) but you could get away with it.

Steve

9

YingPo:
Hi there,

I am currently doing a project for my wireless controlled robotic hand. I am currently using 5 SG90 to control my robotic finger and MG996R servo motor to control wrist movement http://ofwpinoychannel.com/kadenang-ginto/. May I know is it suitable by using 7.2V 3500mAh battery to power the circuit of ?

How about I use total 6 MG996R servo motor instead of 5 SG90 + 1 MG996R servo motor? How many voltage and ampere of battery should I use?

Thank you for giving the solution, I really appreciate that.

The Tower Pro SG90 servo is one of the cheapest servo motors that you can find on the market. Even it’s cheap, less than $5, don’t try to rotate the servo motor by hand because this may damage the motor.