Motorized welding turntable with Arduino UNO
Build a motorized lazy Susan welding turntable with Arduino UNO, a NEMA 17 stepper, and an OLED display. This project covers speed control, grounding, and the full build process.
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Arduino UNO R4 WiFi: A Guide to Sensors and Displays
Learn how to use the STEMMA QT/Qwiic connector on the Arduino UNO R4 WiFi to connect I²C sensors and displays, with a custom adapter board and example code.
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DIY Pulse Oximeter
The oximeter is a tool that allows you to calculate the percentage of oxygen saturation in the blood based on the amount of light absorbed. It consists of a photodiode and two LEDs: a red LED and an infrared LED. To make the measurements, the fingertip is placed between the photodiode and the LEDs as…
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Glowing Air-Bubble Clock in Water
In this project we will see how a clock was created that displays the numbers through air bubbles inside tubes. The system consists of an ESP8266 which, through an I / O Expander MC2301, controls the solenoids that allow the creation of air bubbles inside 8 tubes. There are also a 0.91 “display and 8…
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UV-C Sterilizer
During this pandemic, it has become extremely important to make sure that we take all the necessary steps to keep this coronavirus away from us. Since the vaccines are still under development, the only way to stop the virus is to kill it. The only proven method to kill most of the viruses and…
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A device that throws the ball to dogs
If you have a dog and want to keep it entertained even when you are out of the house, you could do a similar project. It is a device that throws the ball after inserting it into the upper cavity, so your dog can play in total autonomy. The project is based on a Teensy…
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EmoPot – A vase that can show the emotions of plants
In this project we will see how to make a smart pot that can show the emotion of a plant. It uses a soil moisture sensor to monitor the state of the soil and then displays an emoticon expression for that moisture level. To carry out this project we first need a plant pot. In…
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Measuring wheel
In this project we see how to build a measuring wheel designed to be used over distances where rulers and tape measures are no longer practical. Even if it uses a rotary encoder with only 20 steps per revolution it can still provide good quality results by measuring, for example, the size of a room….
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“Arduboy FX SP” an Arduino based Game Boy
Arduboy is a fully open source portable video game console inspired by the classic Nintendo Game Boy. It is Arduino compatible, which makes it easy for users to modify and program new games. The original Arduboy only had enough storage to hold one game at a time, but the new Arduboy FX SP has room…
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AC Dimmer based on ESP8266
A dimmer is a device that allows you to modulate the alternating voltage to be given to a load. In this project, an ESP8266-based dimmer was created that can easily control AC loads such as motors and lights. It has the power to handle more than 1200 Watts and it is a project that can…
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A Smart Controller for Your Diy Uv Cure Box
Resin 3D printers are finally cheap enough that peons like us can finally buy them without skipping too many meals, and what means we’re starting to see more and more of them in the hands of hackers. But to get good results you’ll also want a machine to cure the prints with UV light;…
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Simplify Covid19 diagnosis measuring Heart Rate and SpO2 with MAX30102
Hi, in this tutorial we gonna interface MAX30102: pulse oximetry and heart rate monitor module with Arduino UNO board, and then make a project for measuring BPM using this module + OLED display and a Buzzer. BPM are the “beats per minute” and they are around 65-75 while resting for a normal person, athletics…
