Update README.md

Jarno Lehtinen 2016-10-20 12:01:57 +03:00 committed by GitHub
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@ -166,6 +166,11 @@ You can also use Arduino vice versa. You cannot read USB with normal Arduino, bu
### Level shifting
Very handy level converter with 3.3V AMS1117 regulator. Search from Ebay with `Logic Level Converter Module AMS1117 DC 5V to 3.3V`
![Level converter with AMS1117](https://raw.githubusercontent.com/mcgurk/Arduino-USB-HID-RetroJoystickAdapter/master/Images/Levelconverter_with_AMS1117.jpg)
### Playstation, 3.3V, 3.7V or 5V?
There is contradictory data about Playstation controller voltages. I have one commercial adapter and it's 5V. I haven't measured official Playstation, but it is probably 3.3V.