Reverse polarity protection circuits

Today I bring you several circuits, which will help you protect your projects against reverse polarity. This will help you avoid damage to your circuit if at any time someone connects the power supply backwards. First I'll start with the most basic diode-based ones, then move on to the relay-based…

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Temperature and humidity: Arduino & DHT11/DHT22

Today I bring you a tutorial on how to mount a temperature and humidity sensor with Arduino, using the DHT11 or DHT22 temperature sensor, and the Nokia 5110 display. When doing the project, I focused on consuming as little as possible, since nobody likes having to change the sensor batteries…

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Nokia 5110 LCD Display with Arduino

In this guide I am going to show you how to connect a Nokia 5110 LCD display with Arduino to be able to print texts and numbers on it. Among the advantages are consumption, since this display will consume approximately 0.25ma with the light off (15ma with the light on).…

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Debug with Serial.print on Arduino

In this little guide I am going to teach you something basic to be able to debug your program with Serial.print and other commands. If you are a programmer, you will know how important logs are to detect failures in your program, and since in Arduino we do not have…

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ATTiny85 basic circuit and programming

In this case I am going to bring you a guide about the basic circuit and programming of an ATTiny85. The basic circuit is very simple and only needs a resistance as an external component, unless we want to vary the clock speed with an external crystal. To keep this…

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Reduce power consumption on Arduino

This time I bring you a way to reduce power consumption on Arduino. This will be very useful if your project is going to be powered by batteries and even by solar panels. If your project is basically to read a sensor every so often, you can reduce power consumption…

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