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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