STEMTera is a programmable breadboard module, compatible with Arduino Uno.

It has two microcontrollers built in: ATmega328P and ATmega32U2 and the I/O (40 mA per pin) are accessible without cabling.

The underside of the board (112 x 80 x 17 mm) is compatible with LEGO.

Specifications

Pin-to-pin compatible with Arduino Uno
Mechanically compatible with LEGO blocks
Two microcontrollers (41 I/O of which 9 as PWM)
USB interface with ATmega32U2 using LUFA (Lightweight USB Framework for AVRs) for keyboard, joystick, MIDI, etc...
Programming with the Arduino IDE (micro-USB)
Reset button, 4 LEDs (including TX, RX, Power), power connector
Power via micro-USB or 7...20 VDC on socket 5,5 x 2,1 mm (+ center)
Multiple programming environments:
- Atmel Studio
- Arduino IDE
- AVR-GCC
- AVR-GCC with LUFA library
- Scratch
- etc.
Remarks: Body colour is black | Cables are not included | Shields with ICSP under the PCB can not be inserted

Microcontrollers

ATmega328P:
- 14 pins of I/O including 6 PWM
- 6 analog inputs (10 bit ADC)
- I²C, SPI and serial
- Interrupt controller
ATmega32U2:
- 21 pins of I/O
Flash Memory: 32 KB
SRAM: 2 KB
EEPROM: 1 KB
Clock: 16 MHz