When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
If you have a power device who supplies 2V to 6V ,you should connect to “+” not the “3.3V” interface ,if the power is 3.3v you can connect to 3.3V interface directly.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.