![How to make a contact-less digital tachometer using IR-light reflection technique. Part 2. Circuit setup How to make a contact-less digital tachometer using IR-light reflection technique. Part 2. Circuit setup](https://www.rlocman.ru/i/Image/2011/05/14/1.jpg)
How to make a contact-less digital tachometer using IR-light reflection technique. Part 2. Circuit setup
![JEGS 19726: Wiring Diagram | 1970 Ford Mustang without Tachometer | 11 in. x 17 in. | Laminated | Matching Factory Wire Color-Coding | Sold Individually - JEGS JEGS 19726: Wiring Diagram | 1970 Ford Mustang without Tachometer | 11 in. x 17 in. | Laminated | Matching Factory Wire Color-Coding | Sold Individually - JEGS](https://www.jegs.com/images/photos/500/555/555-19726.jpg)
JEGS 19726: Wiring Diagram | 1970 Ford Mustang without Tachometer | 11 in. x 17 in. | Laminated | Matching Factory Wire Color-Coding | Sold Individually - JEGS
![automotive - Component identification from vintage tachometer - Electrical Engineering Stack Exchange automotive - Component identification from vintage tachometer - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/Gnw3y.jpg)
automotive - Component identification from vintage tachometer - Electrical Engineering Stack Exchange
![pullup - 12 Vdc Intel fan tachometer output to 24 Vdc PLC input - Electrical Engineering Stack Exchange pullup - 12 Vdc Intel fan tachometer output to 24 Vdc PLC input - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/rq99f.jpg)