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.