Level Shifer - Raspberry Pi Forums
5V to 3.3V logic level translation/conversion/shifting: how to interface a 5V output to a 3.3V input. – next-hack.com
5V to 3.3V logic level translation/conversion/shifting: how to interface a 5V output to a 3.3V input. – next-hack.com
Logic level shift 5V <-> 3.3V by using Zener diode and resistors
Voltage Regulator Circuits and Projects | Homemade Circuit Projects
Logic Level Shifting Basics | DigiKey
Level converter — ESP Easy 2.1-beta1 documentation
Zener level-shifter drives high-side switch - EDN
Battery Monitor Circuit. Zener Diodes & Quad Differential… | by J3 | Jungletronics | Medium
Level Shifter - an overview | ScienceDirect Topics
What is Zener Diode? Operation Principle, Types & Uses of Zener Diode as Voltage Regulator, Waveform Clipper and Voltage Shifter
Lab: Level Shifting – ITP Physical Computing
Figure 4 from A Novel Level-Shifter Circuit Design For Display Panel Driver | Semantic Scholar
digital logic - Is it possible to use a simple diode and pullup resistor to level shift down in one direction? - Electrical Engineering Stack Exchange
Salvaged : Full 5V-tolerant Arduino ZERO compat. | Hackaday.io
Lab: Level Shifting – ITP Physical Computing
What's the practical difference between Zener and Schottky clamp circuits? (see image for example) : r/AskElectronics
Zener Diode Explained – StudiousGuy
SD.h library, initialization failed. (using resistor/zener level shifter). - Storage - Arduino Forum
Zener diode as voltage shifter - General Electronics - Arduino Forum
Level shifting 5V to 3.3V - can I just use a zener diode? - Electrical Engineering Stack Exchange
