NKC Electronics has released this little board to allow converting voltage levels between Arduino and other devices.
Recall that Arduino is typically a 5V device and devices that you want to control (such as a DAC) are 3V devices. If you use the Arduino I2C interface (which is 5V logic) to control the 3V I2C interface of a device, you need this converter. More information here.
Hello, do you still need an optocoupler after the level converter to prevent noise from reaching the Opus DAC?
ReplyDeleteDaniel,
ReplyDeleteI don't know. But I have not used it. The volumite from twistedpear does not use it. So I would guess it doens't matter much. I did update the analog power supply of OPUS with the Placid and seem to make an improvement.