How to Build a LASER TACHOMETER

In this project, I am showing you how to build a digital laser tachometer based on Arduino for around 10$. If you need to measure rotational speed, you can just buy it or do it yourself and learn something while building it!

📌 Used parts:

Arduino Nano:

https://www.ebay.com/itm/MINI-USB-Nano-V3-0-ATmega328P-CH340G-5V-16M-Micro-controller-Board-Arduino/263028181552?hash=item3d3db38a30:m:mEdYzNzkjui_b1LT1jFlvUA

128 x 32’’ I2C OLED Display:

https://www.ebay.com/itm/1pcs-0-91-128x32-IIC-I2C-OLED-LCD-Display-DIY-Module-DC3-3V-5V-For-PIC-Arduino/183447406048?hash=item2ab65145e0%3Am%3AmMxose4lr_WvUOaZBpEgB-Q&LH_BIN=1

Tactile Push Button (6x6x7mm):

https://www.ebay.com/itm/2-Pin-Momentary-Tactile-Tact-Push-Button-Switch-Black-6x6x4-3mm-7mm-Miniature/183251999404?hash=item2aaaab9aac:m:m40riuiMesI0w5neIvrkrPQ

Battery connector:

https://www.ebay.com/itm/10-Pcs-Snap-9V-9-Volt-Battery-Clip-Connector-I-Type-Black-w-Cable-Black/122813228347?hash=item1c983d253b%3Ag%3AZfUAAOSwDrNZS16w&LH_BIN=1

Laser emitter:

https://www.ebay.com/itm/650nm-6mm-5V-5mW-mini-Laser-Dot-Diode-Module-Copper-X6B2-SAL-Dot-Red-Head-K-K2X9/264416958362?hash=item3d907a979a:g:sjAAAOSwRn5dQ0Sx

Laser sensor:

https://www.ebay.com/itm/Laser-Sensor-Module-non-modulator-Tube-Laser-Receiver-Module-DIY-For-arduino-WF/372880764757?hash=item56d16cef55:g:DJUAAOSwmxVdnvDY

M2x6mm Screws:

https://www.ebay.com/itm/50PCS-M2X6mm-Screws-Stainless-Steel-Round-Head-Plain-End-Metric-Machine/401255438898?hash=item5d6cb01a32:g:MWwAAOSwopRYb-h6

📌 Other:

3D File:

https://www.thingiverse.com/Elite_Worm/about

Code:

https://github.com/EliteWorm/Tachometer/blob/master/Laser_Tachometer_V1_0_0.ino

Third party used libraries:

https://github.com/adafruit/Adafruit_SSD1306
https://github.com/adafruit/Adafruit-GFX-Library

Electronic connections:

128 x 32’’ I2C OLED Display to Arduino Nano as follows:

GND to GND
VCC to 5V
SCK to A5
SDA to A4

9V Battery to Arduino Nano as follows:

Negative (black) to GND
Positive (red) to Push Button Pin 1 and Push Button Pin 2 to VIN

Laser Diode to Laser Sensor Module as follows:

Positive (red) to VCC
Negative (blue) to GND

Laser Sensor Module to Arduino Nano as follows:

VCC to 5V
GND to GND
OUT to D2

► Music Credit: Dj Quads

Track Name: "It's Near"
Track Name: "Dreams"

Music by Dj Quads @ https://soundcloud.com/aka-dj-quads
• Official DJ QUads YouTube channel HERE: https://www.youtube.com/channel/UCusF...
• DJ QUads Twitter HERE: https://twitter.com/DjQuads
• DJ QUads Spotify HERE: https://open.spotify.com/artist/2VZrd...
• DJ QUads Instagram HERE: https://www.instagram.com/djquads
• Original upload HERE - https://www.youtube.com/watch?v=G5mRT...
• Music promoted by NCM: https://goo.gl/fh3rEJ

#3dprinting #arduino #diy