Timer Power Unit with OLED Display (INA3221)

2024-11-20T10:24:53+00:00

Price: 9.60

This Timer Power Unit is a smart power supply device that charges and discharges, has timed switching and boosts output. Power is provided through a Type-C connector and can also connect to an external rechargeable battery through a 1.25-2P interface. With an internal STM32 microcontroller handling RTC and overall control, you can set automatic power on and off times.

This includes a built-in battery charging circuit that supports a charging current of 330mA and an integrated DC-DC boost circuit that delivers a 5V/800mA power output (up to 1400mA with a fully charged battery) to external devices through the Grove port. The INA3221 sensor provides real-time monitoring of input and output current and voltage, giving you a clear view of power performance.

A 0.66" OLED display with two side buttons can check the system status and adjust settings. You can configure parameters such as power scheduling directly using the buttons or through the Grove port using I2C commands. This makes the unit easy to integrate into smart systems or timed control setups.

Features

RTC cycle timing control

Battery power supply

Built-in DC-DC boost circuit

Current/voltage monitoring

OLED display

Grove interface

Button-controlled power on/off mode

Specifications

MCU | STM32G031G8U6
Input Voltage | Supports 5V DC input (via Type-C interface)
Output Voltage | Built-in DCDC boost circuit, output 5V for external devices
Battery Power Supply | 3.7V Polymer Lithium Battery
Display Screen | 0.66" OLED display, resolution 64 x 48, SPI communication
Connectors | Type-C interface: for battery charging (cannot power Grove port directly)
Grove interface: for external sensors and modules, supports communication and power output
Battery interface: 1.25mm@2P
I2C Communication Address | 0x56
Current Sensor | INA3221
Charging Current | DC5V@330mA
Charging Chip | LGS4056H
Charging Temperature | 55°C
Grove Port Max Current Output | Dependent on battery capacity and discharge ability, e.g.
1400mAh@1C 3.7V: DC4.96V@800mA
500mAh@1C 3.7V: DC4.97V@700mA
110mAh@1C 3.7V: DC5.03V@400mA
Standby Current | DC4.2V@36.67uA
Operating Temperature | 0-40°C
Product Dimensions | 40 x 24 x 11mm
Package Dimensions | 136 x 92 x 14mm
Product Weight | 7.6g
Package Weight | 12.9g

Resources

Product Wiki

Package Contents

1x Timer Power Unit

1x HY2.0 4-pin Grove Cable (20cm)