I bought a few off Taobao and they work fine on 3.3V.
Not sure what the page said about working voltage, it was at the beginning of my microprocessor career and I just rather randomly got together some stuff hoping it all worked 
I bought a few off Taobao and they work fine on 3.3V.
Not sure what the page said about working voltage, it was at the beginning of my microprocessor career and I just rather randomly got together some stuff hoping it all worked