Arduino Mega 2560 Microcontroller - RobotShop

STM8S003 High-Performance Development Board - RobotShop

RB-DFR-130 RobotShop, Maker/DIY, Educational

Arduino Micro USB Microcontroller - RobotShop

Adeept Mega2560 Ultimate Starter Kit - RobotShop

UCTRONICS Ultimate Starter Learning Kit for Arduino MEGA - RobotShop

Arduino Due 32bit ARM Microcontroller - RobotShop

Arduino Microcontroller Feature Comparison

UCTRONICS Ultimate Starter Learning Kit for Arduino MEGA - RobotShop

Arduino Zero Compatible SAMD21 ARM Cortex M0 Dev Board - RobotShop

Adeept ATmega2560 Microcontroller - RobotShop

EtherMega Ethernet Arduino Compatible Microcontroller - RobotShop

The Arduino Leonardo is a microcontroller board based on the ATmega32u4. It has 20 digital input/output pins 7 of which can be used as PWM outputs and 12 as analogueue inputs a 16 MHz crystal oscillator a micro USB port a power supply jack an ICSP header and a reset button. It contains everything was needed to support the microcontroller; simply connect it to a computer with a USB cable or supply it with an AC/DC adapter or a battery to get started.

Arduino Leonardo Without Headers (A000052)

Seeedstudio Grove Mega Shield v1.2 - RobotShop

EtherMega Ethernet Arduino Compatible Microcontroller - RobotShop