Power Management HAT for Raspberry Pi, Embedded Arduino MCU and RTC

Description

The Power Management HAT is a smart power bank designed for Raspberry Pi. With the embedded Arduino MCU and RTC, the HAT features auto power management function which allows the Pi to work more power-efficient and more safely.

If you're looking for some convenient utilities for your long-term working Raspberry Pi, such as longer battery life, or auto power on-off control, this Power Management HAT would be the ideal choice.

By auto starting up on a specified period, and auto shutdown at other times, the HAT can greatly save battery life. It will monitor the operating voltage/current status of the Raspberry Pi in real-time and can be configured to shut the Pi down according to the operating status. What's more, it comes with a handy power switch for easy on or off (safely shutdown the Pi by software), to avoid data loss caused by unplugging the power supply.

Features

• Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards
• Onboard ATmega328P MCU, supports Arduino programming
• Onboard PCF8523 RTC chip, provides precise RTC information
• Onboard CP2102 UART converter, for UART communication or ATmega328P programming
• The user-defined button can be used for Raspberry Pi startup, safely shutdown, or other customized function
• Protection circuits such as power supply anti-reverse, counter-current proof, etc. ensure stable and safe operating
• Voltage/current monitoring circuit monitors the Raspberry Pi operating voltage and current in real-time
• Comes with development resources and manual

Specification

• Controller: ATmega328P-AU
• Communication interface: UART + GPIO
• Baudrate: 115200bps by default (programmable)
• Power supply interface: USB port or PH2.0 connector
• USB power input voltage: 5V
• PH2.0 power input voltage: DC 7~28V (regulated power supply or lithium battery)
• Embedded circuits: power supply anti-reverse, counter-current proof, voltage monitoring, current monitoring
• Mounting hole size: 3.0mm

What's on Board

1.ATmega328P-AU MCU
2.MP1584 power manager
3.PCF8523 RTC chip
4.CP2102 UART converter
5.CAT24C32: EEPROM storage chip
6.Raspberry Pi GPIO connector: for connecting Raspberry Pi
7.PH2.0 connector: for 7~28V regulated power supply or lithium battery
8.USB TO UART: for power input or UART communication
9.DEBUG switch:

DEBUG side: power supply will bypass the Arduino and directly provides to Raspberry Pi
the opposite side: power supply is managed by Arduino

10.PWR button: for Raspberry Pi power on/off, or user-defined function
11.RST button: Arduino reset
12.Status indicator
13.Power indicator
14.CR1220 button battery holder
15.UART selection:

A: access Arduino via USB to UART
B: control the Raspberry Pi by Arduino
C: access Raspberry Pi via USB to UART

Example

Dimension

Part List

1. Power Management HAT x1
2. 18650 battery case x1
3. USB-A to USB micro B cable x1
4. 2x20PIN female pinheader x1
5. RPi screws pack (2pcs) x1