Blink and you may have missed it, but Arduino Day was Saturday, 3/16. To celebrate the fact SparkFun probably wouldn't be here without Arduino, we've taken 20% off most of our SparkFun Original boards! We aren't a big fan of leaving discounts just to the weekend though, so we've extended our deals through the end of today. Check out some of our favorites on sale below, but act fast as some boards may sell out. You have until 11:59 p.m. MST tonight to score a deal. Happy belated Arduino Day!