Tachometer DIY
thingiverse
How to build a Tachometer - use smartphone to display via OTG cable https://www.youtube.com/watch?v=MJKpTC19WxI
Download Model from thingiverse
With this file you will be able to print Tachometer DIY with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Tachometer DIY.