A different regulator may have a low enough drop out to run from the 5V rail though instead of Vin. Other manufacturers make other regulators, and you may find a better choice for you I found most to be pricier and require larger stabilizing caps. Sadly there doesn't seem to be a standard for 3.3V regulators, the 78元3 is only made by ST. I used a 78元3, simply because I have them in inventory. I think I will also add the 3.3V regulator With Freeduino, it is important to add the name of the person / company making the enhancements to the board, so if two or more at the same time name a board "Freeduino serial v2.0", then the only way to distinguish one of the other is by the name (Fundamental Logic in your case). The version number should be V2.0 or superior, as the changes from V1.0 justifies the new version number
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