The Autonomo is a matchbox-sized Arduino compatible board which uses the Atmel Cortex M0+ 32bit microcontroller. It was designed it to be autonomous (self-sufficient) by enabling it to be powered by a smartphone-sized solar panel. The goal was to create a device which would be able to run indefinitely using solar generated power. The Autonomo has been designed to run efficiently and with extremely low power consumption.
Microcontroller ATSAMD21J18, 32-Bit ARM Cortex M0+ Compatibility Arduino M0 compatible Size 58.5 x 33.5 mm Operating Voltage 3.3V Digital I/O Pins 16, with 12 PWM, UART, SPI and TWI (I2C) Analog Input Pins 6, 12-bit ADC channels Analog Output Pins 10-bit DAC External Interrupts Available on all pins except pin 4 DC Current per I/O pin 7 mA Flash Memory 256 KB SRAM 32 KB EEPROM Up to 16KB by emulation Clock Speed 48 MHz Debug Serial Wire Interface Communications Bee compatible slot for communication modules with software switchable power Storage 16Mbit Dataflash Module and Micro SD card holder Power 5V USB power and/or 3.7V LiPo battery Power switch Software switchable power for connected devices up to 1A Charging Solar charge controller, up to 500mA charge current LED's Yellow charge LED and green LED on pin 13