MCP4725 Breakout Board - Any more than 2 ?
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- wdickenson
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- Joined: Fri Nov 16, 2012 8:43 pm
MCP4725 Breakout Board - Any more than 2 ?
I need to convert 4 signals from digital to analog. This BOB seems to only have one switch so I am presuming that the max I can have is 2 ? Thanks
- adafruit_support_bill
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- Joined: Sat Feb 07, 2009 10:11 am
Re: MCP4725 Breakout Board - Any more than 2 ?
You can have two per I2C bus. Assuming an Arduino, that is two max. On a Raspberry Pi, there are two busses, so you can have four.
- wdickenson
- Posts: 184
- Joined: Fri Nov 16, 2012 8:43 pm
Re: MCP4725 Breakout Board - Any more than 2 ?
Oh... now thats an interesting comment. So I can have two busses on an UNO ? I guess that never occurred to me but I suppose just defining one with A4+A5 and another with A2+A3 would work ?
Thanks
Thanks
- adafruit_support_bill
- Posts: 88087
- Joined: Sat Feb 07, 2009 10:11 am
Re: MCP4725 Breakout Board - Any more than 2 ?
Unlike the Raspberry Pi, The UNO only has one 'hardware' I2C bus (on A4 & A5).
There is a "software I2C" library: http://forums.adafruit.com/viewtopic.php?f=25&t=13722
But you would have to hack the MCP4725 library a bit to use it.
There is a "software I2C" library: http://forums.adafruit.com/viewtopic.php?f=25&t=13722
But you would have to hack the MCP4725 library a bit to use it.
Please be positive and constructive with your questions and comments.