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by jr1988
Wed Oct 30, 2013 2:12 am
Forum: General discussion
Topic: I2C LCD not detected
Replies: 30
Views: 19705

Re: I2C LCD not detected

I stand corrected.. Thanks for the explanation!
by jr1988
Tue Oct 29, 2013 9:08 pm
Forum: General discussion
Topic: I2C LCD not detected
Replies: 30
Views: 19705

Re: I2C LCD not detected

The way the I2C bus works: (1) Each I2C line in the bus has a pull-up resistor to 3.3V. This means that when the device is idle, the Raspberry Pi will read a 'high' signal on the SDA and SCL lines, at 3.3V (2) Devices communicate over the bus by pulling the lines down to ground. (3) There is a maste...

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