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It has 22 digital input/output pins (13 of these can also utilize the ADC onboard for PWM), 10 analog inputs, a USB Type-B connector, a DC Barrel jack for power, an ICSP header and a reset button on board!
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.