Portable Power on Raspberry Pi

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moron_makes
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Portable Power on Raspberry Pi

Post by moron_makes » Sat Dec 15, 2018 3:00 pm

Hi, I'm an alright programmer, but - as the name suggests - a moron when it comes to making things. Pretty much no understanding of electricity and for portable projects I generally just use a powerbank. For this project I'm hoping to use this 2500mah lipo battery (https://www.modmypi.com/raspberry-pi/po ... 7v-2500mah)

I'm looking at 5 products to use with the battery and don't understand how they differ - I have a moderate understanding of 1 and 2.

1) USB 5V Voltage Booster Step Up Module (https://www.modmypi.com/electronics/pow ... -up-module)

2) 5V DC/DC Regulator (https://www.modmypi.com/power-1137/dcdc-5v)

3) Pimoroni LiPo Shim (Zero LiPo) (https://www.modmypi.com/raspberry-pi/po ... -zero-lipo)

4) PowerBoost 500 Charger - Rechargeable 5V Lipo USB Boost (https://www.modmypi.com/adafruit-indust ... -usb-boost)

5) PowerBoost 1000 Charger - Rechargeable 5V Lipo USB Boost (https://www.modmypi.com/adafruit-indust ... -usb-boost)

Thanks for any help you can offer!

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Dave
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Re: Portable Power on Raspberry Pi

Post by Dave » Mon Dec 17, 2018 9:39 am

moron_makes wrote:
Sat Dec 15, 2018 3:00 pm
1) USB 5V Voltage Booster Step Up Module (https://www.modmypi.com/electronics/pow ... -up-module)
This simply steps up the voltage from an input voltage between 0.9 - 5.0 volts, giving you a constant 5v output, that can supply 600mA - Great for using with batteries, like a lipo. The output current is low though, so would only be recommended for use with a Pi Zero. This isn't able to charge your battery.
moron_makes wrote:
Sat Dec 15, 2018 3:00 pm
2) 5V DC/DC Regulator (https://www.modmypi.com/power-1137/dcdc-5v)
This is a step DOWN regulator. It requires a minimum input voltage of 7v... No good for use with batteries.
moron_makes wrote:
Sat Dec 15, 2018 3:00 pm
3) Pimoroni LiPo Shim (Zero LiPo) (https://www.modmypi.com/raspberry-pi/po ... -zero-lipo)
Neat little solution for using a lipo to power your Pi. Has a moderate current output of 1.5A which will be ok for running the full size Pi's, however if you are demanding a lot of power from your Pi, then you may get some low power warnings. It does have a couple nice bonus features, low battery warning (you will need to write a script to "listen" to GPIO 04, if this pin goes high, it means the battery is low), also has automatic shutdown feature when battery is empty. This isn't able to charge your battery.
moron_makes wrote:
Sat Dec 15, 2018 3:00 pm
4) PowerBoost 500 Charger - Rechargeable 5V Lipo USB Boost (https://www.modmypi.com/adafruit-indust ... -usb-boost)
This is very similar to option 1, however has the ability to charge the battery as well. Slightly lower output current though of about 500mA (you might be able to draw more, depending on the battery). Adafruit have been clever though and have upped the voltage a little bit, from 5v to 5.2v - This gives more leeway for voltage drops, reducing the likelihood of getting low power warnings under heavy load.
moron_makes wrote:
Sat Dec 15, 2018 3:00 pm
5) PowerBoost 1000 Charger - Rechargeable 5V Lipo USB Boost (https://www.modmypi.com/adafruit-indust ... -usb-boost)
Same as option 4 with two main differences, higher battery charging rate of 1A instead of 500mA (this is not the same as the output current, only charging current). And a smart-switching charger. Simply means mains power can always be plugged into this device, and it will automatically use mains power when available (and also charge battery) then if the mains power fails, it automatically switches over to using battery power.
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