Battery for Arduino + 2 HS-785HB Servos

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1

Hi,

What would be the best battery solution (battery + charger) to power an Arduino Uno board and up to two HS-785HB servos (at 6V to have maximum torque)?

The Arduino itself can only provide 5V and the servos requires lots of current compared to it. So they cannot be powered from the Arduino board directly. But can I power both the Arduino and the servo using the same battery?

2

Based on these recommandation and my very minimal understanding of electronics and Arduino I came with the following wiring:

servo-battery_bb.jpg
servo-battery_bb.jpg800×553 17.8 KB

The recommended input voltage for the Uno board requires is 7-12V, so a boost regulator is used to boost the 6v from the battery to 7v.

Is this a proper solution?

3

You can use a voltage regulator to increase the voltage to the microcontroller. Your battery should correspond to the servos and be from 4.8V to 6V and be able to provide about 1.5 to 2A continuously. Consider RB-Lyn-135, RB-Lyn-54 (connector) and RB-Gws-13 (and a power supply).

4

Small image, but seems to be ok. To make sure:

  • You connect the battery directly to the servo motor (Red / GND)
  • The signal wire goes to a digital pin on the Arduino
  • The GND from the battery also goes to the Arduino
  • The battery also goes to the input of voltage regulator, and the output goes to the Vin and GND pins of the Arduino.