XO ATTINY85 General Micro USB Development Board for Arduino<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Power via USB or External Source - 5v or 7-35v (automatic selection). On-board 500ma 5V Regulator. Built-in USB (and serial debugging). </span></li><li><span class="a-list-item"> 6 I/O Pins (2 are used for USB only if your program actively communicates over USB， otherwise you can use all 6 even if you are programming via USB). </span></li><li><span class="a-list-item"> 8k Flash Memory (about 6k after bootloader). I2C and SPI (vis USI). </span></li><li><span class="a-list-item"> PWM on 3 pins (more possible with Software PWM). ADC on 4 pins. </span></li><li><span class="a-list-item"> Power LED and Test/Status LED (on Pin0). Size: 1.8cm x 2.6cm . </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41mbQ-zYnAL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/416a4yQkP2L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51AnxigLQ7L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51O2B2ZNObL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/411lbElPalL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41VuC2GA8RL.jpg" noproxy>