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Topic: Servo power and signal voltage (Read 1 time) previous topic - next topic

Anders

Hi

I want to make a self-balancing robot with Futaba continouos rotation servos. I would like to power the servos from 4XAA 1.2V batteries since they might draw to much current for the Arduino. How do I get my control signal to the servos to the correct voltage. The servo VIN pin will get 4.8V while the output from the Arduino will be 5V.

Anders

SRyLul

#1
Mar 06, 2010, 09:45 am Last Edit: Mar 06, 2010, 09:52 am by srylul Reason: 1
Principal:
Servo_+ to Ack_+,
Servo_- to Ack_- to Arduino_-,
Servo_Signal to Arduino_Output.

Just remember; AA cells dont last long before recharging.
And you cant adjust servo speed. Well, not really. Just sort of. Eh, I will explain later if you are interested.

Why not use small rc bruschless esc-motor combos instead? And LiPo cells? If you havent bought the servos yet, its almost the same money.

Anders

I have already bought the servos and built the platform for the robot so I will try with servos first.

What do you mean with Ack?

Anders

SRyLul

Sorry Anders,
I often write from my way of speaking...
Ack = Ackumulator = BatteryPack.

Servo_+ to BatteryPack_+ ,
Servo_- to BatteryPack_- to Arduino_- ,
Servo_Signal to Arduino_Output .


Anders

So you think it is ok to power the servo with 4.8V and give it a control signal of 5V?

SRyLul

No problem at all.
I fact, its common to feed the servo separatly .

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