Arduino logic levels - arduino logic levels_pdf - docscrewbankscom
3. 3v input to Arduino digital pin. Input of 3. 3V would probably be ok (the ATMega328P micro has a min highlogic level voltage of 3V with a 5V supply).
Almost all CMOS logic chips require the input voltage to be 0. 5V and Vdd0. 5V Certainly the microcontrollers used in Arduinos are no exception.
The Arduino boards use AVR microprocessors, The Adafruit 4channel I2Csafe Bidirectional Logic Level Converter.
Arduino serial: inverted 7E1. Possible? and 1 stop bit (Active low or inverted logic levels): I have access to a Arduino Mega.
logic levels. An I2C logic level When using I2C to interface devices operating at different voltages, for example an Arduino running at 5 Volts and a sensor.
SparkFun Logic Level Converter is a small device that safely steps down 5V signals to 3. 3V and visversa. Also works with 2. 8V and 1. 8V devices