DescriptionThe Timer Power Unit is a compact timed power supply module for charge/discharge control, scheduled switching, status display, and boosted 5V output. It integrates an STM32 microcontroller for RTC timing…
100% Secure Payment & Data Safety
Global Delivery & Fast Dispatch
30 Days Free Return & Exchange
The Timer Power Unit is a compact timed power supply module for charge/discharge control, scheduled switching, status display, and boosted 5V output. It integrates an STM32 microcontroller for RTC timing and overall control, allowing automatic power-on and power-off schedules for embedded devices.
The Timer Power Unit uses Type-C for battery charging and connects to a 3.7V rechargeable lithium battery through a 1.25mm 2P battery connector. A built-in charging circuit supports 330mA charging current, while the DC-DC boost circuit can supply 5V output through the Grove port for external modules.
With an INA3221 current sensor, a 0.66-inch OLED display, two side buttons, and Grove I2C control, the Timer Power Unit lets users monitor input/output voltage and current, adjust operating modes, and build portable timed power systems.
Notice: The Timer Power Unit must be connected to a lithium battery during use. The USB Type-C interface is only for charging the battery and cannot be used directly as the output power supply.
| Type | Timer Power Unit timed power supply module |
| MCU | STM32G031G8U6 |
| Input voltage | 5V DC input through Type-C interface |
| Output voltage | Built-in DC-DC boost circuit outputs 5V for external devices |
| Battery | 3.7V polymer lithium battery |
| Display | 0.66-inch OLED display, 64 x 48 resolution, SPI communication |
| Interfaces | Type-C for battery charging; Grove for external sensors, module expansion, communication, and external power; 1.25mm 2P battery interface |
| I2C address | 0x56 |
| Current sensor | INA3221 |
| Charging current | DC 5V at 330mA |
| Charging chip | LGS4056H |
| Charging temperature | 55C |
| Grove port max output current | Depends on battery capacity and discharge capability, such as 1400mAh at 1C: DC 4.96V at 800mA; 500mAh at 1C: DC 4.97V at 700mA; 110mAh at 1C: DC 5.03V at 400mA |
| Standby current | DC 4.2V at 36.67uA |
| Operating temperature | 0 ~ 40C |
| Item dimensions | 40.0 x 24.0 x 11.0mm |
| Item weight | 7.5g |
| Package size | 138.0 x 93.0 x 12.0mm |
| Gross weight | 13.2g |
Before deployment, select a lithium battery with suitable capacity and discharge capability for the expected Grove load. The Timer Power Unit is especially useful when a system needs to remain off most of the time and wake only at scheduled intervals.
TimerPWR document
TimerPWR schematic PDF
INA3221 current and voltage monitor datasheet
LGS4056H battery charger datasheet
M5Unit-TimerPWR Arduino library
TimerPWR UiFlow2 API documentation
TimerPWR internal firmware repository
TimerPWR I2C protocol PDF
No. The Timer Power Unit must be connected to a lithium battery during use because the Type-C port is only for charging.
No. The Type-C port charges the battery, while the boosted 5V output is provided through the Grove port from the battery-powered circuit.
The Timer Power Unit can be configured with its side buttons or through Grove I2C commands for timed power control.
We offer fast and reliable shipping worldwide. All orders are carefully packaged and shipped within 1–3 business days after payment confirmation.
Standard shipping, expedited shipping and express delivery options are available at checkout. Delivery time depends on your destination country and local logistics.
Only logged in customers who have purchased this product may leave a review.
Add Related products to weekly line up
Special Ofers For Subscribers
