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<style> body.view_post { overflow: auto; padding: 0 20px; } body.view_post #raspihub_toolbar { padding: 0 20px; margin-left: -20px; margin-right: -20px; } </style> <div> <h1>Raspberry Pi and I2C devices of different voltage</h1> <p>After my recent posts on using the MCP23017 I/O expander with the Raspberry Pi several people have queried the connection of an I2C device running at 5v to the Raspberry Pi’s 3v3 I/O. The reason why this is safe in this case is that on an I2C bus the cloc</p> <p>Your browser doesn't support frames, here's the link <a href="http://nathan.chantrell.net/20120610/raspberry-pi-and-i2c-devices-of-different-voltage/?utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+NathanChantrell+%28nathan.chantrell.net%29" rel="nofollow">http://nathan.chantrell.net/20120610/raspberry-pi-and-i2c-devices-of-different-voltage/?utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+NathanChantrell+%28nathan.chantrell.net%29</a></p> </div>