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Superb, really a perfect video tutorial on I2C bus capacitance and role of pull up resistance, you can also get the no of maximum slave by doing this calculation.
Great video, i have a quick question so i have a raspberry Pi 3 and i connect the pull resister of 4.7k and to the I2C Bus i have 34 devices that works well, when i connect the final 6, i start loosing data over the bus, does this mean i can lower my pull-up resistor to 2.2k so that i dont encounter data lost?