GitHub Repository Up and Running

Thank you for so much good feedback. There have been people asking about a GitHub repository for the code to do the safe shutdown.

https://github.com/JuiceBoxZero/LowBatteryShutdown

There you go.

Full instructions are in README.md for how to get the software. Of course, you may modify it, based on your needs/skill level, but the posted instructions should get it running on your Raspberry Pi Zero.

Because this is a GitHub repository, you’ll need internet access on your Pi, so I recommend either doing this in one of the following ways: all on a full size Raspberry PI, using a USB WIFI dongle on a Pi Zero, or using a Pi Zero W that is connected to WIFI.

Kickstarter campaign is successfully funded!

A HUGE THANK YOU TO ALL THE BACKERS!


  • This has been an amazing experience, and we want to make sure that everyone stays updated on JuiceBox Zero.
  • We will  be posting updates periodically about manufacturing progress and any answers to JuiceBox Zero questions we can manage!

Feel free to contact any of us at JuiceBox Zero, and we’ll get back to you as soon as we can!

info@juiceboxzero.com

sam@juiceboxzero.com

ryan@juiceboxzero.com

How to use JuiceBox Zero

Overview

JuiceBox Zero lets you power a Raspberry Pi Zero with a Li-Ion or Li-Poly battery.  The following will help you understand JuiceBox Zero and how to use it.


Board Specs and features

  • Uses any single cell Li-Ion or Li-Poly battery (3.7/4.2V) with a JST brand PH connector

  • This is a 1 Amp source
    • It can source 1 Amp to the 5 Volt output and charge the battery at 1 Amp, so it can draw up to 2 Amps total from your micro-USB supply.

 

  • On/Off switch

  • Mounting holes
    • Specifically designed for the Pi Camera, but can be used for any sensor or breakout board that doesn’t stack nicely onto a Pi.

  • Low battery GPIO trigger
    • Use the code at the end of this guide to safely shut down your Pi when the battery reaches 3.2V
    • Default GPIO is 16, but you can cut the trace between the pads  and make a solder bridge on the GPIO 25 pads too!
    • GPIO is digital LOW or 0 until the battery voltage reaches 3.2V, then it goes HIGH or 1.

  • Micro USB charging
    • Make sure your power supply can source at least 2A.
    • Do not plug the micro USB power cable into the Pi Zero power port or damage could occur to either board.

  • Status LEDs
    • Red (LOW1) = Low battery
    • Yellow (CHRG1) = Charging
    • Green (CHRG2) = Fully charged
    • Blue (PWR1) = Power switch is ON


Assembly

Tools and supplies needed


Steps

  1. Put stacking header on Raspberry Pi Zero
    1. This will help keep it in place because soldering is definitely a two-handed job.
  2. Put some standoffs into the Pi Zero.
    1. Two are probably sufficient, but there’s nothing wrong with using four.
  3. Place the JuiceBox Zero onto the header and fasten down with screws.
    1. Be careful to not bend your Pi or JuiceBox if the headers aren’t the exact same height as the standoffs!
  4. Solder the header to the JuiceBox Zero.

  1. Done!
    1. “You are now free to move about the cabin.”
    2. Follow the guide in the next section to see how to use JuiceBox Zero.


How to Use JuiceBox Zero

  1. Plug in a Li-Ion battery that has a JST connector.
    1. Watch polarity, and only single cell batteries, please.
  2. Turn the Power switch to the “ON” position.
    1. A blue LED (marked PWR1) should light up.
  3. To charge the battery and/or run the Pi Zero off a micro-USB, plug a micro-USB cable into the JuiceBox Zero’s charge port.
    1. When JuiceBox Zero is connected to a micro-USB cable, the yellow charging LED will light up.
    2. Important: Do not connect power to the Pi Zero power port while JuiceBox Zero is connected, this could damage either your Pi Zero or JuiceBox Zero!
    3. Another note: make sure your charger is 2A capable.

Good 🙂

 

Bad 🙁