Technical Design

• The book locks open when two tabs attached to clothespins close, keeping the leafs of the book spine from closing
• The book is powered by a 9V battery fed through a 5V DC Regulator
• An ATTiny85 with a 16kHz external clock reads values from 5 photodiodes which detect whether or not a page has been read based on whether or not the photodiode is covered
• Photodiode threshold values are constantly being reevaluated based on the room's ambient light
• If a page has been read without the reader skipping ahead or flipping several pages at once, the LED corresponding to the flipped page turns green
• Once all of the pages have been read and all the LEDs are green, the reader can push the labelled button and two servos will pull the clothespins open, allowing the book to close
• The book was built with MDF and plywood and measures 48" x 17" x 3.5"

Github