DIY Tachometer (RPM Meter)

Arduino Pro Mini 328 - 3.3V/8MHz

Graphic OLED, 128 x 64

TP4056 Lithium Battery Charger Module 

Slide Switch

Soldering iron (generic)

Li-Ion Battery 1000mAh

IR Distance Sensor

<p ><span >In this project, I will show you how a 3€ IR distance sensor works and how we can use it to build a proper DIY tachometer that functions properly. </span><strong >Let's get started!</strong></p><h3 ><span >Step 1: Watch the Video!</span></h3><div class="se-component se-video-container __se__float-none" contenteditable="false" style="width: 100%;"><figure style="width: 100%; height: 56.25%; padding-bottom: 56.25%; margin: 0px;"><iframe frameborder="0" allowfullscreen="" src="https://www.youtube.com/embed/6QZMt4yyylU" data-proportion="true" data-percentage="100%,56.25%" data-size="100%,56.25%" data-align="none" style="width: 100%; height: 100%;" data-index="0" data-file-size="0" data-origin="100%,56.25%"></iframe><figcaption contenteditable="true"><div>Make sure to watch the video. It gives you all the information you need to create your own DIY tachometer. But during the next steps I will present you some additional information.</div></figcaption></figure></div><h3 ><span >Step 2: Order the Components!</span></h3><figure><img src=https://projects.arduinocontent.cc/1275eff4-70d5-4c9d-be46-dd3a13f920c4.jpg /><figcaption> </figcaption></figure><h3 ><span >Step 3: Create the Circuit!</span></h3><figure><img src=https://projects.arduinocontent.cc/30a3c6f7-57f9-4693-a44e-7be62d36ed0d.jpg /><figcaption> </figcaption></figure><p ></p><figure><img src=https://projects.arduinocontent.cc/5e33a4a8-5f19-43cd-938c-b1bab2d185be.jpg /><figcaption> </figcaption></figure><p ></p><figure><img src=https://projects.arduinocontent.cc/97c7911c-1e40-469e-bc7c-b235b3a6b44e.jpg /><figcaption> </figcaption></figure><p ></p><figure><img src=https://projects.arduinocontent.cc/019fd18d-8964-48e3-866a-9b58f75647b1.jpg /><figcaption> </figcaption></figure><p ></p><figure><img src=https://projects.arduinocontent.cc/2fdb35dc-df91-4246-bad9-a13c83973d39.jpg /><figcaption> </figcaption></figure><p ></p><figure><img src=https://projects.arduinocontent.cc/dd35b650-add9-48c6-97a1-ec8fc789f153.jpg /><figcaption> </figcaption></figure><p ></p><figure><img src=https://projects.arduinocontent.cc/5153ee24-73f5-4f0c-9d6a-2f234805b6c8.jpg /><figcaption> </figcaption></figure><h3 ><span >Step 4: Upload the Code!</span></h3><p >Here you can find the code for the project. Upload it through an FTDI breakout board. Also, make sure to include this library:</p><p ><a href="https://github.com/olikraus/u8g2">https://github.com/olikraus/u8g2</a></p><p >Also make sure that you use the  board setting: Arduino Pro Mini 3.3V 8MHz</p><p >You did it! You just created your own DIY Tachometer! </p>

Schematics 

CODE:

DIY Tachometer (RPM Meter)

In this project, I will show you how we can use a 3€ IR distance sensor to build a proper DIY tachometer that functions properly.