Sand VariTimer FJs Physics Video 197

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=uUipxIa1WPk

First update on a sand timer since the 14th Century? Why not have one sand timer that can be set to a range of different times? Here I have a go at designing and building one! • Many thanks again to PCBWay for sponsoring this video • https://www.pcbway.com/ • Please consider supporting my work by buying me a coffee at • https://www.buymeacoffee.com/francisj... • Helps me buy bits and pieces to make these videos! • Very many thanks, F-J

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