I bought the "Sunfounder Sensor Kit" for Raspberry Pi 2, but the whole content is made for Arduino (5V). I have bought ADC, Level Shifters but I am stuck because I think I certainly miss a simple solution.
- I read that voltage divider with resistors would not work correctly before an ADC. EDIT: http://electronics.stackexchange.com
- My ADC has a SPI interface, so I need a bi-directional exchange with Pi, but if I power it with 5V, I need a level Shifter for GPIO. I have only mono-directional level shifters.
I don't know how to use these sensors efficiently ?
Could I use one level shifter in each direction on the same ADC between it and GPIOs ?
Do I need bi-directional level shifter ?
Do you know a 5V->3.3V ADC ?
Did I miss a simple solution ? Thank you.