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Timeline for Tinyduino I/O line voltage level

Current License: CC BY-SA 3.0

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Dec 6, 2017 at 16:01 vote accept driveguy
Dec 5, 2017 at 15:18 comment added Majenko That's correct.
Dec 5, 2017 at 15:17 comment added driveguy So if I want to use 5V I/O (for the Max7219) and I want portable 3.7V lithium power, then I need a boost circuit to get it to 5V? At least that's what I take from your answer.
Dec 5, 2017 at 15:00 history answered Majenko CC BY-SA 3.0