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17% OFF I2C IIC Level Conversion Module Sensor 5V / 3V Geekcreit für Arduino - Produkte, die mit offiziellen Arduino-Karten funktionieren US$2.15 US$2.58 View It

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polypagan 30/01/2018

This little I2C (or any mono- or bi-directional 2-wire bus) level converter works just fine. There is nothing in the description that indicates that there is an on-board LDO 3v3 regulator. This is handy if you need it (to supply the 'B' voltage). Not so handy if you don't know it's there and apply 3v3 to the "BVCC" pin whilst applying 5v to "AVCC". Probably not a crisis, but you would be shorting two power supplies together. A close look at the photos in the listing show the presence of the 5-terminal device in addition to the pair of MOSFETS.

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