Including an audio option with an electronic or Internet-of-Things (IoT) project is often an ideal addition. However, microcontrollers cannot process MP3 files, which is the most common audio file format. Fortunately, there is a solution. It is possible to play MP3 audio files on Arduino using dedicated MP3 decoders like the DFPlayer Mini or MP3-TF-16P.…

Weighing scales are frequently used to measure the weight of goods, such as bulk items and raw materials. We sometimes use them at grocery stores to weigh produce or at home to measure our weight. Building a weighing scale is no simple task. It involves a combination of load cells, amplifier circuits, and microcontrollers or…

Today, mobile-based authentication to verify a person’s identity is common. Online service providers often use it for access to services, approval of transactions, or to change a user’s credentials.  Imagine using a similar mobile-based authentication to enter your home, office, or any private space. It’s possible. In this project, we’ll design a mobile-based access system…

In this project, we’ll build a paint application on Arduino UNO/Arduino Mega that runs on a 3.5-inch TFT touchscreen display based on the ILI9486 driver. The ILI9486 touchscreen has a display resolution of 320×480 pixels. Using a stylus, you can draw, paint, and write on it (even in your own handwriting ).  Required components  Arduino…

Typical electronic voting machines require voters to push a button to cast their ballots. However, there have been security concerns with these devices and whether they’re at risk for tampering. One solution is to use biometric-based voting machines, which use fingerprint matching or a retina scan to verify an authorized voter.  In this project, we’ll…