RPM meter with arduino DIY (IR sensor and 3D printed case)

Easy to build, 3D printed and homemade RPM meter/Tachometer with Arduino. The circuit is easy and based on a IR LED and phototransistor. You have all the codes, schematics and STL files below. I hope you enjoy it.
------------------COUPONS------------------
OLED module: http://www.gearbest.com/development-boards/pp_140621.html?lkid=11039253
Anet E10: http://www.gearbest.com/3d-printers-3d-printer-kits/pp_664901.html?lkid=11039255
TronxyX5: http://www.gearbest.com/3d-printers-3d-printer-kits/pp_633678.html?lkid=11039259
Arduino starter KIT: http://www.gearbest.com/development-boards/pp_211518.html?lkid=11039257
Help my projects on Patreon: https://www.patreon.com/ELECTRONOOBS
my Q&A page: http://electronoobs.com/eng_preguntas.php
Canal en Español: https://www.youtube.com/channel/UCL_QvUUeriC6q610RCXDlSQ
------------------LINKS--------------------
DIY RPM meter webpage: http://www.electronoobs.com/eng_arduino_tut15.php
----------------MATERIAL----------------
Full part list: https://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_id=114&ipn=icep&toolid=20004&campid=5338106513&mpre=http%3A%2F%2Fwww.ebay.com%2Fitm%2F0-96-I2C-SPI-Serial-128X64-White-OLED-LCD-LED-Display-Module-High-Q-%2F222488771147%3Fepid%3D811557467%26hash%3Ditem33cd5d3a4b%3Ag%3AAg8AAOSwVm5ZADrNArduino NANO: https://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_id=114&ipn=icep&toolid=20004&campid=5338106513&mpre=http%3A%2F%2Fwww.ebay.com%2Fitm%2FNano-V3-0-Mini-USB-ATmega328-5V-16M-Micro-controller-Board-CH340G-Arduino-Cable-%2F162002876661%3Fhash%3Ditem25b81fb8f5%3Ag%3ARYYAAOSw5cNYfJ0j%26rmvSB%3Dtrue
Push button: https://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_id=114&ipn=icep&toolid=20004&campid=5338106513&mpre=http%3A%2F%2Fwww.ebay.com%2Fitm%2F5Pcs-Red-12mm-Waterproof-Momentary-ON-OFF-Push-Button-Mini-Round-Switch-%2F141868777441%3Fepid%3D1361876878%26hash%3Ditem210809bfe1%3Ag%3A6KgAAOSwKtlWicoU%26rmvSB%3Dtrue
LM324: https://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_id=114&ipn=icep&toolid=20004&campid=5338106513&mpre=http%3A%2F%2Fwww.ebay.com%2Fitm%2F10PCS-LM324N-LM324-DIP-14-TI-Low-Power-Quad-Op-Amp-IC-%2F130963517925%3Fhash%3Ditem1e7e08b1e5%3Ag%3AX3cAAOSwsW9YwLxL
IR sensor: https://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_id=114&ipn=icep&toolid=20004&campid=5338106513&mpre=http%3A%2F%2Fwww.ebay.com%2Fitm%2F10pcs-TCRT5000L-TCRT5000-Reflective-Optical-Sensor-Photoelectric-Switches-%2F401221575044%3Fepid%3D514891099%26hash%3Ditem5d6aab6184%3Ag%3AB60AAOSwKOJYIHz1%26rmvSB%3Dtrue
----------------DOWNLOADS-----------
Schematic: http://www.electronoobs.com/eng_arduino_tut15_1.php
3D STL files: http://www.electronoobs.com/eng_arduino_tut15_stl_1.php
Adafruit SD13006.h: http://www.electronoobs.com/eng_arduino_tut15_lib_2.php
Adafruit_GFX.h: http://www.electronoobs.com/eng_arduino_tut15_lib_1.php
Code: http://www.electronoobs.com/eng_arduino_tut15_code1.php
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Видео RPM meter with arduino DIY (IR sensor and 3D printed case) канала Electronoobs