29€

$2 for 2Layer, 5pcs & $5 for 4Layer, 5pcs: https://jlcpcb.com Previous video: https://youtu.be/05qJM-zZ4ng uC Timer video: https://youtu.be/IdL0_ZJ7V2s Facebook: https://www.facebook.com/greatscottlab Twitter: https://twitter.com/GreatScottLab Support me for more videos: https://www.patreon.com/GreatScott?ty=h More project information (schematic, code,….) on Instructables: https://www.instructables.com/id/DIY-Tachometer-RPM-Meter/ Parts list (affiliate links): 1x Arduino Pro Mini: https://s.click.aliexpress.com/e/_dTWuuYz 1x IR Distance Sensor: https://s.click.aliexpress.com/e/_dXlui7F 1xContinue Reading