Scratch Model of Pascaline to illustrate the carry principle
Notes & Credits
inspired by Yves Serra :
https://www.youtube.com/watch?v=GX4RQK__fQc
https://www.youtube.com/watch?v=hSl2WFfCTD8
and Michael L Hilton :
https://www.youtube.com/watch?v=3h71HAJWnVU)
