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Thanks for taking the time reading this question! It is greatly appreciated.

What are we doing
We (two complete noobs) are building a remote controlled boat from scratch using Arduino compatible components. With a hull created of paper-foarm soaked in glue and expoxy we aim to create a sturdy vessel capable of carrying a can of beer at a reasonable speed across the local waters.

What are we trying to use
Using an Arduino UNO for the boat, Arduino Nano for the remote control (housed in a modified PS4 controller body) and a bunch of sensors, OLED screens and NRF24L01 transceivers we have gotten the basics and some fancy extra's sorted.

However we are unsure about our most crucial components. After some failed attempts we have discovered we need a motor with enough torque or/and a gearbox to be able to propel our vessel within actual water. These higher specced motors also require a beefier power source and thus we've been looking into LiPo-batteries. This is where we got stuck!

Our research has brought us to selecting the following components:

Specific questions
Primary:

  • How do we connect the LiPo battery to the Motor Driver Shield in a safe manner?

Secondary:

  • Can the LiPo be connected using a XT60 to Dupont cable?
  • Is the motor torque of 78.4 gcm / 784 ncm at 9869 rpm sufficient for water movement?
  • Do we even need the current sensor modules?
  • Is the charger correct for this battery?
  • Any other recommended H-bridge or Motor Driver that supports near 10A?

Tertiary:

  • Shoot any holes into our plan - any and all suggestions welcome!
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  • $\begingroup$ are you planning to turn the propeller at 9800 rpm? $\endgroup$
    – jsotola
    Commented Aug 8, 2021 at 3:38
  • $\begingroup$ @jsotola yes, if the torque is enough those high rpms make the boat go fast? Please correct us :) $\endgroup$
    – user2863494
    Commented Aug 8, 2021 at 11:52
  • $\begingroup$ A google search on ‘typical rpm of a boat propeller’ indicates 9800 rpm may be on the high side. The specific propellor you use (e.g., it’s pitch and diameter) will have a big impact on the desirable rpm range. $\endgroup$
    – RowanP
    Commented Aug 9, 2021 at 12:09
  • $\begingroup$ @RowanP how much torque do you think we need per motor? A very rough estimate would be great! $\endgroup$
    – user2863494
    Commented Aug 30, 2021 at 19:47

1 Answer 1

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You connect a battery to the shield via the power input terminal as described in the data sheet you linked. Refer to figures 1 and 4, and table 1.

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  • $\begingroup$ But how do we physicially connect it? The battery has an xt60 plug, the shield takes direct wiring plugged to those screws? Thanks! $\endgroup$
    – user2863494
    Commented Aug 9, 2021 at 20:23
  • $\begingroup$ One option is to cut of the XT60. $\endgroup$
    – RowanP
    Commented Aug 9, 2021 at 21:26
  • $\begingroup$ Another option would be to solder a short tail to an XT60 socket. Use that as an adapter between your battery and the shield power input. $\endgroup$
    – RowanP
    Commented Aug 10, 2021 at 5:16

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