µHex - Low Power Controller
The µHex is an ultra-low-power Arduino-compatible controller built around the ATmega328P, designed for battery-powered projects. With a sleep current of just 0.12 µA at 3.3V, a single CR2032 coin cell (210 mAh) can keep it running for up to 60 days. Its unique hexagonal PCB packs 14 GPIO pins and 7 power ports into a compact 28 × 31 mm form factor.
Four of the power output ports can be individually switched off via software to further reduce consumption. Two sleep-wake interfaces allow the controller to be woken by external events, making it ideal for sensor nodes and intermittent monitoring applications. Programmed via the Arduino IDE as an "Arduino Pro or Pro Mini (3.3V, 8 MHz)".
Key Features
- Ultra-Low Sleep Current – 0.12 µA at 3.3V (watchdog off)
- ATmega328P – Arduino-compatible, 8 MHz RC oscillator
- 14 Digital I/O Pins – Including PWM on pins 3, 5, 9, 10, 11
- 6 Analog Inputs – For sensor integration
- 4 Switchable Power Outputs – Reduce power by disabling unused peripherals
- 2 Sleep-Wake Interfaces – External interrupt-driven wake-up
- 2.7–5V Operation – Runs directly from a CR2032 or other low-voltage sources
- Compact Hexagonal Design – 28 × 31 × 2.3 mm, 10 g
Specifications
- Microcontroller – ATmega328P
- Flash – 32 KB (0.5 KB bootloader)
- SRAM – 2 KB
- EEPROM – 1 KB
- Interfaces – 1× UART, 1× I2C, 2× Interrupt
- Max Current – 2 A
- Solder Pad Pitch – 2 mm / 2.54 mm
Ideal For
- Battery-powered sensor nodes and data loggers
- IoT devices with long battery life requirements
- Wearable electronics
- Remote monitoring and intermittent sensing
Package Contents
- 1× µHex Low-Power Controller
Resources
The µHex - Low Power Controller appears in the following collections:
