They are a very effective protection against over voltage and reverse polarity. Let's look at how diodes can be used as input protection.
The MAX3010x sensors can do more than just heart rate measurements. Let's do some pulse oximetry.
Our previous approach for heart rate measurements didn't work very well. It's time for a better and more scientific algorithm.
Now that we can acquire data with MAX3010x modules, it's time to apply our heart rate detection algorithm to it.
It's time for some more advanced heart rate sensors. Today, we are going to take a look at the MAX3010x pulse oximeter sensor family.
As promised, we are going to look at another solution for detecting heart beats. This time without using a buffer.
In the last part of this tutorial, we already tried out the KY-039 module. Today, we are going to implement a proper heart rate detection.
Today, we are going to look at a very simple heart rate sensor. Let's discover how it works and how we can measure the heart rate with it.
The LM35 is a cheap and easy to use analog temperature sensor found in many Arduino Kits. Let's find out how to use it.
DACs are often used together with analog circuits. As an example for this we will use the MCP4725 to build a programmable current source.
One of the limits of the Arduino Uno is that it doesn't have a DAC. The external MCP4725 module is thus an interesting extension.
Interested in sensing environmental data? Let's have a look at another humidity and temperature sensor: the HTU21D.
Do you want to measure humidity and temperature for one of your projects? The DHT11 and DHT22 are a popular choice.
LDRs are an easy solution to react to brightness changes. Let's look at corresponding Arduino modules.
Want an easy-to-use digital temperature sensor? The DS18B20 is a popular alternative to analog temperature modules.
Do you want to trigger an action once the temperature crosses certain point? Then you are in need of a temperature threshold module.
Do you need to know the temperature for one of your Arduino projects? In this tutorial we learn how to use analog temperature modules.
This is the end of my Arduino Introduction Series. It's time to sum everything up and look ahead!
Sometimes you want to display measurements without using the serial monitor. In this tutorial we learn how to use an LCD for this purpose.
Ever wondered how IR remote controls work? Let's look into it and use one to control an LED connected to our Arduino.
