doodle clock #2

pinshape

I built the first doodle clock http://hackaday.com/2012/03/14/robotic-doodle-clock/ 3 years ago as a joke, but watching it work was mesmerizing. I wanted to turn it into a practical desk clock. The biggest problem with the first clock was that markers dried up after just 30 minutes of use. To solve this issue, I found magnetic writing boards http://www.walmart.com/ip/Fisher-Price-Doodle-Pro-Basic-Purple/26012794 designed for children. I used 2mm cylindrical magnets inside a solenoid to write and erase text. Next, I replaced servos with small geared steppers to make the clock silent and smoother. Finally, all parts were designed and 3D printed. The final PCB was also manufactured.