OLIMEX© 2020
MOD-IO user's manual
CHAPTER 7: REVISION HISTORY AND SUPPORT
7. Introduction to the chapter
In this chapter you will find the current and the previous version of the document you are reading. Also
the web-page for your device is listed. Be sure to check it after a purchase for the latest available updates
and examples.
7.1 Document revision
Document revision
Changes
Modified page
A, 26.06.14
Initial manual release
All
B, 14.05.15
Fixed typo in commands required by i2c-
tools; added instruction for usage in
Arduino; improved the section borders for
better readability; improved the numbering
of the chapters
14, 19-30
C, 28.08.20
Fixed incorrect information about power;
added hardware revision A1; improved
formatting
All
7.2 Board revision
Remember to check the schematics and the board design files to compare the differences.
Board revision
Notable changes
A
Initial release of the board
A1
1. Changed resistor R27, R29, R31, R33 from 330R/0603 to 3.9K/0603;
also changed R28, R30, R32, R34 from 4.7K/0603 to 47K/0603 in order to
change the range of voltage on opto-isolators from 3-6V to 3-24V. Max
frequency now around 500Hz
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