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How pinMode, digitalWrite and digitalRead Work

arduino digital input

I believe what makes Arduino popular is how it makes microcontrollers easier to use. I remember the time when I have to spent hours coding a project and then spend money on programming hardware. Arduino has its limitations, but the platform helps create tons of electronic projects even for non-engineers. …

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MQ-135 Air Quality Sensor Tutorial

MQ-135 breakout board

The MQ-135 “air quality” sensor is part of the MQ series of gas sensors that uses a chemical sensitive element. The resistance of such element varies when exposed to certain gases. The MQ-135 is sensitive to multiple gases including Benzene, Acetone, Alcohol and Ammonium.

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Arduino Current Sensor Tutorial

arduino current sensor

Current sensors can have different applications: power supplies, over-current protection, and motor control to name a few. In this Arduino current sensor tutorial, we will look at how to read current using the ACS712 sensor.

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