Handling Power Hungry Sensors in a Low-Power Project

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In this post I explained how one can use 5V power-hungry sensors via 3.3V microcontroller. There are still several sensors that need to be powered by 5V power supply. However, more recent development boards are eqquiped with 3.3V microcontrollers. As a result, we need to address some serious challenges. Challenges include:

1- How to utilize 3.7V Lipo battery for a 5V sensor.

2- How to control energy consumption of the sensors by turning them on and off periodically.

3- How to read the analog output of a 5V sensor with a 3.3V microcontroller.

4- In what condition we can power a sensor through one of the microcontroller’s pin.