Based on the Arduino UNO board (RS 769-7409) and a scaled down version of the METRO (RS 124-5519), this Adafruit METRO Mini is ideal for use with a host of projects and example codes. Simply run the ATmega328P at 16 MHz with 32 KB of flash and 2 KB of RAM for most simple projects. It comes complete with 20 GPIO pins including analogue inputs, hardware UART, SPI and I2C, timers and PWM. Logic level is 5 V but you can convert things easily to 3.3 V.
£14.06 including VAT