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The Arduino Ethernet Shield allows an Arduino board to connect to the internet. It is based on the Wiznet W5100 ethernet chip (datasheet). The Wiznet W5100 provides a network (IP) stack capable of both TCP and UDP. It supports up to four simultaneous socket connections. Use the Ethernet library to write sketches which connect to the internet using the shield. The ethernet shield connects to an Arduino board using long wire-wrap headers which extend through the shield. This keeps the pin layout intact and allows another shield to be stacked on top. The latest revision of the shield adds a micro-SD card slot, which can be used to store files for serving over the network. It is compatible with the Arduino Duemilanove and Mega
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1): Wide Input Range This product AD620 zoom, you can zoom microvolts mV, more accurate than the market LM358 amplification, better linearity. 2): magnification using potentiometer amplify the input signal, magnification up to 10,000 times, can be adjusted only via a potentiometer. 3): Wide power supply range 7-24V DC power supply can be entered Performance: -Wide supply voltage range: 7-24V input -Ultra-low input offset voltage: 50μV maximum. -Ultra Low Input Bias Current: 1.0nA (maximum). -CMRR: 100dB -Ultra-low input offset voltage drift: 0.6μV / (maximum). -Ultra-stable, time: 2μV / month maximum