Arduino Uno R3 (with Arduino Logo) and USB power cable.
These have also become commodized and we occasionally use multiple sources. We don't obtain the least expensive versions and we always randomly test to see that the "Hello World" functions. Colors may vary depending on where we source from.
We know you can purchase from anyone so we are very grateful for choosing Hardware for Hackers!
Microcontroller Microchip ATmega328P
Operating Voltage 5V
USB Standard Type B
Digital I/O Pins 14
PWM Digital I/O Pins 6
Analog Input Pins 6
Flash Memory 32 KB
SRAM 2 KB
EEPROM 1 KB
Clock Speed 16 MHz