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== Additional ressources == | == Additional ressources == | ||
Version du 18 mars 2022 à 01:18
Abstract
There are several way to power the power the Pico and your project.
The Pico run with 3.3V and can be powered with a voltage up to 5.5V. As the Pico voltage regulator is a Step-down/Step-up regulator (reduce/up-raise the source voltage) you can power it directly from batteries. Even when the battery voltage falls down under 3.3V the Pico will be able to run anyway.
Despite the simplicity to directly powering the Pico from a battery or a Lipo, there is also some interest to use specialized charging/discharging circuitery.
How-To Power Pico
The Pico can be powered:
- Via the USB : so with 5V
- Via the VSYS pin : with battery having max 5.5V
- With a Battery Charger/discharge circuitery and smart wiring ;-) (as seen here below)
The Pico can be easily shutdown by placing the 3V3_EN pin to the ground.
This will deactivate the Pico 3.3V DC/DC regulator and spare the battery power.
Pico and PowerBoost
Crédit: AdaFruit Industries www.adafruit.com
The Adafruit PowerBoost 500 is a breakout board able:
- to discharge a Lipo battery and generates 5V output (500mA max)
- to charge the Lipo battery when connected to an external 5V power
- to do the both operations at the same time.
The great thing about this breakout is that microUSB connector is optional to charge the Lipo.
Powering the breakout with 5V on the USB pin will have exactly the same effect than plug-in the USB cable.
Additional ressources
- PowerBoost 500 charger tutorial (French)
Written by Meurisse D. for MCHobby