i2c

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gpio from raspberry pi

gpio from raspberry pi

0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- 48 -- -- 4b -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- 77

devices shown are ADC (*2) and bmp180

i2c pins connectors

Some rules when connecting devices (modules) like sensors: with special attention to serial busses like i2c.
This is the start of a guide to show how to build circuits with multiple types of sub assemblies.
It also documents the thought processes in connecting a Raspberry Pi to external sensors. The sensors are on a standalone board and operate

from different voltages. Work is happening to interface the BBC micro:bit, Cypress boards and Arduinos.
The i2c protocol requires the SDA and SCL lines to be bidirectional (i.e. input and output)

cypress ezi2c i2c

pca9685

pca9685 data sheet
Operating power supply voltage range of 2.3 V to 5.5 V
It is 5V compliant, which means you can control it from a 3.3V microcontroller and still safely drive up to 6V outputs (this is good for when you want to control white or blue LEDs with 3.4+ forward voltages).

logic analyser i2c arduino addresses

from address scanner


19:18:05.775 -> I2C scanner. M Scanning ...
19:18:05.822 -> Found address: 39 (0x27)
19:18:05.822 -> Found address: 60 (0x3C)
19:18:05.869 -> Found address: 118 (0x76)
19:18:05.916 -> Done.
19:18:05.916 -> Found 3 device(s).


LiquidCrystal_I2C code on github

logic analyser

I2C sample

A screen shot of I2C protocol sample. I need to find the code - repeated sending of incremented data from Arduino to LCD.
The sample was recorded on a win 8 laptop.

i2c protocol

coprocessors for Embedded Sytems Design

oled i2c

slice of pi

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