I2C 5V to 3.3V Arduino

@franshejhej

10 years ago

https://everycircuit.com/circuit/5305249105969152

Arduino got an internal pull-upp resistor of 40 kohm. By choose a much lower resistor (4.7kOhm) to the 3.3V voltage source, the signal is converted from 5V to 3.3V.