![]() Ralf SHey Oscar!I just found your (super) instructions, and wanted to go through it.Funny, I already fail on the very beginning. I’d like to connect an Arduino Uno to a 3.3v sensor through RX/TXNow I understand Arduino-TX - sensor-RX needs a voltage divider ( so the 5V of the arduino doesn’t break the sensor).Now I’d expect the 3.3V from the sensor TX to Arduino-RX to be “safe”, however you mention in some situations the Arduino-RX can be at 5V, which would then go to the sensor and might break itSo question ( assuming not using a level-divider)– why not have 2 voltage dividers? ( for both TX-RX and RX-TX connections)– could we put a schottky diode between the “Arduino-RX” to “sensor-TX”, to make sure there can only be a flow from the sensor to the Arduino, and and the diode blocks the other way around ( note: n00b here, so I might be completely misunderstanding it ).Regards. ![]()
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