Nice post from electronupdate:So in the original recipe Raspberry Pi Zero there is a single integrated circuit which provides voltage regulation. Outlined in red in the photo below:Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time! // Read more: original article.