Electronik Hub - Cabanatuan, Philippines

is a microcontroller board (Arduino Compatible) based on the ATmega328P. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header and a reset button.

Arduino, Uno, Arduino Uno, Arduino Uno R3

Pi Zero Features:

BCM 2835 SOC @ 1GHz
1GHz
512MB of RAM
micro-SD
mini-HDMI
micro-B USB for data
micro-B USB for power
Unpopulated 40-pin GPIO connector
Compatible with existing HAT addons
Dimensions: 65mm x 30mm x 5mm

The Arduino Mega is a microcontroller board based on the ATmega1280 (datasheet). It has 54 digital input/output pins (of which 14 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started. The Mega is compatible with most shields designed for the Arduino Duemilanove or Diecimila.