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Small green PCB expansion board with 10 GPIO pins and battery connector

KEHIPI

KEHIPI ESP32-C3 SUPERMINI Expansion Board 10 GPIO 22mm

SKU CH-4J83-YJ48T

Expansion board adds 10 GPIO pins, 3.7 V lithium-battery charging via USB, and dual 3.3 V or 3.7 V power outputs in a 22 mm form factor

  • Connect external 3.7V lithium battery with USB charging
  • Green indicator shows charging status and full charge
  • All 10 GPIO pins extended for sensor connections
  • Dual power outputs VCC1 and VCC2 default to 3.3V
  • Short PCB to switch VCC1 or VCC2 independently to 3.7V

Purpose-built expansion

The KEHIPI ESP32-C3 SUPERMINI expansion board is an IoT edge device designed specifically for the ESP32-C3 SUPERMINI development board. It adds a PH2.0 interface for an external 3.7V lithium battery with USB charging support. All 10 GPIO pins are extended for convenient sensor connections.

Build integration

The board addresses limitations of the base development board by providing two independent power outputs, VCC1 and VCC2, which default to 3.3V. A green indicator shows charging status. Users can modify the PCB to output 3.7V by bridging solder pads, freeing the project from fixed voltage constraints.

Thermals and power

In normal use the board manages power delivery for ESP32-C3, ESP32-S3, ESP32-H2 and ESP32-C6 modules through the dual VCC outputs. The compact 22mm form factor integrates the charging circuit and GPIO breakout without active cooling. Power draw follows the connected battery and USB supply characteristics.

Besonderheiten

  • Connect external 3.7V lithium battery with USB charging
  • Green indicator shows charging status and full charge
  • All 10 GPIO pins extended for sensor connections
  • Dual power outputs VCC1 and VCC2 default to 3.3V
  • Short PCB to switch VCC1 or VCC2 independently to 3.7V

Technische Daten

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Fragen zu diesem Artikel

How long can the 3.7 V lithium battery run the board under continuous load?

Battery run-time depends on the current draw of the attached ESP32-C3 SUPERMINI and any sensors connected to the 10 GPIO pins; the expansion board itself adds no fixed limit.

Does the board generate noticeable heat or noise when powered from the 3.7 V battery all day?

The expansion board has no active components, so it produces no fan noise and negligible heat; any warmth comes from the ESP32-C3 SUPERMINI module mounted on it.

Which development board must I already own for this expansion board to function?

It is designed for the ESP32-C3 SUPERMINI development board and also compatible with ESP32-S3, ESP32-H2 and ESP32-C6 modules that share the same pinout.

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