Customer:
We are evaluating the SSD1306 for potential use and have questions about the voltage supply. The documentation shows different voltage levels in different places. Can you clarify what voltages should be used?
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Originally submitted via the contact form on soldered.com on 9 September 2025. Migrated to the forum for community visibility.
Soldered Support:
On the header pins you can connect 5V or 3.3V VCC and logic on the SCL and SDA pins. On the Qwiic/easyC connectors you need to use 3.3V VCC and logic levels, which is the Qwiic/easyC standard. You can use one or the other, per your preference. Qwiic/easyC is very convenient. The VDD/VCC for panel driving on the panel datasheet is handled internally on the IC so you don’t have to worry about it. For more details, check the documentation at Ssd1306 - Overview | Soldered Documentation
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