Arduino Tutorial

Have you read the MAX30100 tutorial and are still having trouble making that chip work? Maybe it’s time to use another Arduino heart rate sensor. The MAX30102 module has a better hardware design and software support. I’ll explain why after the jump.

The Arduino was invented primarily for non-engineers but now, a lot of engineers are also into it. Using it in a fully-developed project is not a good look, yes, but it’s a lot quicker than building from scratch.  My only issue at the beginning is finding the best way to …

Fingerprint sensors are old technology but it wasn’t readily available to makers until it was cheap. With such a device, you could easily create a keyless secure lock, biometric attendance system, and many more. Fingerprint Sensor Module I managed to secure a fingerprint sensor module that communicates via TTL serial. …

A finite state machine (FSM) is a theoretical machine that only has one action or state at a time. The machine may go from one state to another if there are inputs (or one input) that triggers the state change. In this article, I will guide you on how to …

The MQ-4 is one of many gas sensors ready to be interfaced with microcontrollers. Just like the rest of the MQ sensors, the MQ-4 is most sensitive to a particular gas. This time, it’s methane, although the sensor can still detect other flammable gases like butane and propane.

The BH1750 is a light-intensity sensor that interfaces with a microcontroller through the I2C bus. It can directly provide lux values without further processing, unlike CdS cells or photodiodes.

How can you create sine, square or triangular waves with Arduino? Apparently, there’s a way with the help of an IC package -- the AD9833. With it, you can now create waveforms for communications, instrumentation, or other similar projects. My tutorial on building your own Arduino AD9833 signal generator after …

In Arduino programming, we learn about functions setup() and loop(). Any code inside setup() executes once while code inside loop() executes again and again until the next reset. Now what if while inside the loop(), something went wrong either in code or in hardware? Normally we just press the reset …

A seven segment display has one pin for each of its seven segments. This means if directly interfaced with a microcontroller, you will need at least seven pins. Fortunately, there is a way to use four seven segment displays and using only four pins from your Arduino.

Measuring weight is a useful feature in many Arduino projects. You can use it to build a digital weighing scale, a force sensor, a smart container, or a weight-based trigger for automation projects. In this load cell Arduino tutorial, you will learn how to connect a load cell to an …