© Warren Gay 2017

Warren Gay, Custom Raspberry Pi Interfaces, 10.1007/978-1-4842-2406-9_2

2. 3V/5V Signal Interfacing

Warren Gay

(1)St Catharines, Ontario, Canada

Looking through online forums, I often see posts from people struggling with how to interface between 3V and 5V logic systems. Advice varies widely, ranging from “connecting it directly seems to work for me” to other dubious methods.

The purpose of this chapter is to eliminate the guesswork. The solutions presented here are not the only solutions available, but they are practical for those seeking answers. I’ll focus specifically on 3.3V and 5V systems in this chapter because the Pi is a 3V system and a great many parts still use 5 volts.

To be clear, this chapter is about signal interfacing, ...

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