Powering both a Trex Jr and a Raspberry Pi 3 from the Dagu 5 rover battery pack using a D24V50F5

Support Motor controllers/drivers and motors
1

I’m driving two Dagu 5 rover motors (https://www.pololu.com/product/1551) with a Trex Jr (https://www.pololu.com/product/767) and controlling that via a Raspberry Pi 3 (UART), powered from a USB battery pack.

I would like to eliminate the USB battery pack, and run both the motors and the RPi3 from the Dagu battery pack (6xAA). Can I achieve this by using a step down regulator (https://www.pololu.com/product/2851 or similar) connected to the RPi3 microUSB port? Should I take some precautions, in order not to fry my RPi3?

2

Hello.

You should be able to power the Raspberry Pi 3 from the D24V50F5 voltage regulator and you can connect it to the Raspberry Pi micro USB port through a cable. If you tell me more about your plan to power your Raspberry Pi, I might be able to give you more advice.

Grant

3

Hey Grant, thanks for your help :slight_smile:

  1. connect battery pack (6*1.5v=9V) to D24V50F5 VIN and GND (in parallel with TrexJR)
  2. connect battery pack to TrexJR VIN and GND (in parallel with D24V50F5)
  3. Cut off the USB-A-end of a USB-A <–>-microUSB-B cable, and connect D24V50F5 OUT and GND to 5V and GND wires
  4. Power Rpi3 with this microUSB

Should this work?

4

Hello.

Thanks for providing detailed connection information. All of those connection sound fine.

Grant