| I needed a tacho/RPM display for a CNC spindle. I decided to use an Arduino Micro and OLED display with a reflective LED/Photo transistor as...
All items tagged with Elektor Labs and Display (12)
![Tacho/RPM for CNC etc using Arduino Micro and OLED Display [130470-I]](https://cdn.xingosoftware.com/elektor/images/fetch/dpr_1,w_800,h_340,c_fit/https%3A%2F%2Fwww.elektormagazine.com%2Fassets%2Fupload%2Fimg%2Fpublic%2Foriginal%2Ftacho-display.JPG)
| Simple circuit that will project the car's speed on the wind screen using 7-segment LED displays and a microcontroller.Update June 5, 2012