Timer Power Unit with OLED Display (INA3221)
Description The TimerPWR Unit is a timed power supply unit whose main functions are "charging & discharging + timed switching + screen display + boost output." It features an internal STM32 microcontroller that implements RTC and overall control, allowing users to set automatic power on/off times as needed. It is powered via the Type-C interface and can be connected to an external rechargeable battery via a 1.25-2P interface. The unit includes a built-in battery charging circuit supporting a charging current of 330mA. It also features an integrated DCDC boost circuit that provides a 5V/800mA (1400mA @ 1C battery power) power output to external devices via the Grove port. Additionally, the INA3221 sensor is built-in, allowing real-time monitoring of power input and output current and voltage. The unit is equipped with a 0.66-inch OLED display and two side buttons for user interaction, making it easy to view real-time system status and modify settings. Users can set parameters such as power on/off using the side buttons or via the I2C bus through the Grove interface with I2C commands. This product is suitable for smart homes, industrial automation, and timed control devices. Features RTC cycle timing control Battery power supply Built-in DCDC boost circuit Current/voltage monitoring OLED display Grove interface Button-controlled power on/off mode Includes 1x TimerPWR Unit 1x HY2.0-4P Grove cable (20cm) Applications Timed control devices Portable electronic devices Powering sensor nodes Specifications Specification Parameters 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-inch OLED display, resolution 64x48, SPI communication Interfaces Type-C interface: for battery charging (cannot power Grove port directly)Grove interface: for external sensors and modules, supports communication and power outputBattery 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@800mA500mAh@1C 3.7V: DC4.97V@700mA110mAh@1C 3.7V: DC5.03V@400mA Standby Current DC4.2V@36.67uA Operating Temperature 0-40°C Product Dimensions 40*24*11mm Package Dimensions 136*92*14mm Product Weight 7.6g Package Weight 12.9g LEARN AND DOCUMENTS DOCUMENTS