Comments on: I2CScanner.pde: Arduino as I2C bus scanner http://todbot.com/blog/2009/11/29/i2cscanner-pde-arduino-as-i2c-bus-scanner/ Random experiments, circuits, code, rapid prototyping, sometimes things to buy, and the odd tune by Tod E. Kurt. Sun, 14 Mar 2010 04:13:46 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: todbot http://todbot.com/blog/2009/11/29/i2cscanner-pde-arduino-as-i2c-bus-scanner/comment-page-1/#comment-63713 todbot Sun, 14 Mar 2010 04:13:46 +0000 http://todbot.com/blog/?p=731#comment-63713 Hi Stephan, The normal value one sees for pull-up resistors on an I2C bus is 4.7k. But if you're running many devices or a long bus cable, you should lower that to 2.2k or even 1.0k. Hi Stephan,
The normal value one sees for pull-up resistors on an I2C bus is 4.7k. But if you’re running many devices or a long bus cable, you should lower that to 2.2k or even 1.0k.

]]> By: Stephen http://todbot.com/blog/2009/11/29/i2cscanner-pde-arduino-as-i2c-bus-scanner/comment-page-1/#comment-63515 Stephen Sat, 13 Mar 2010 10:03:47 +0000 http://todbot.com/blog/?p=731#comment-63515 Hi, You noticed the two resistors on the SDA and SCL line, but what are the values? Stephen Hi,

You noticed the two resistors on the SDA and SCL line, but what are the values?

Stephen

]]> By: brokenlcd http://todbot.com/blog/2009/11/29/i2cscanner-pde-arduino-as-i2c-bus-scanner/comment-page-1/#comment-58950 brokenlcd Wed, 10 Feb 2010 09:26:44 +0000 http://todbot.com/blog/?p=731#comment-58950 I had to change the end address to 127 to have my DS1307 show up in the scanner. If your device isn't showing up, you might try increasing the end address accordingly. I had to change the end address to 127 to have my DS1307 show up in the scanner. If your device isn’t showing up, you might try increasing the end address accordingly.

]]> By: Tobi http://todbot.com/blog/2009/11/29/i2cscanner-pde-arduino-as-i2c-bus-scanner/comment-page-1/#comment-58882 Tobi Wed, 03 Feb 2010 22:11:44 +0000 http://todbot.com/blog/?p=731#comment-58882 that's awesome! thanks for sharing this.. that’s awesome! thanks for sharing this..

]]> By: todbot http://todbot.com/blog/2009/11/29/i2cscanner-pde-arduino-as-i2c-bus-scanner/comment-page-1/#comment-58845 todbot Fri, 29 Jan 2010 02:09:01 +0000 http://todbot.com/blog/?p=731#comment-58845 Hi Andre, The cable is made from standard 0.05" pitch ribbon cable and standard 0.1" pitch IDC crimp connectors. The cables used in your PC for IDE disk drives are the same (but with more connectors). In this post, I list the exact parts I used: http://todbot.com/blog/2008/06/17/get-on-the-blinkm-bus-with-a-blinkm-cylon/ Hi Andre,
The cable is made from standard 0.05″ pitch ribbon cable and standard 0.1″ pitch IDC crimp connectors. The cables used in your PC for IDE disk drives are the same (but with more connectors). In this post, I list the exact parts I used:
http://todbot.com/blog/2008/06/17/get-on-the-blinkm-bus-with-a-blinkm-cylon/

]]> By: Andre http://todbot.com/blog/2009/11/29/i2cscanner-pde-arduino-as-i2c-bus-scanner/comment-page-1/#comment-58842 Andre Wed, 27 Jan 2010 22:50:32 +0000 http://todbot.com/blog/?p=731#comment-58842 Is that multidrop cable custom made ? Whats are the details. Is that multidrop cable custom made ? Whats are the details.

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