ON-THE-FLY NOTES
3.3V vs 5V Logic Levels
A practical explanation of why voltage compatibility matters between development boards and sensors.
VIDEO NOTE
Video coming soon
This note will include a short practical video explanation.WRITTEN NOTE
Development boards do not always use the same logic voltage. An ESP32 normally works with 3.3V logic, while many Arduino boards use 5V logic. Sending a 5V signal directly into a 3.3V-only input may damage the device. In the video, show an ESP32 and an Arduino side by side, point to their logic voltages, and explain that a level shifter or voltage divider may be required when connecting incompatible devices.
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