Comments on: Rev12 of the Arduino DMX Reception Software Released http://blog.wingedvictorydesign.com/2009/05/12/rev12-of-the-arduino-dmx-reception-software-released/ Hold my beer while I try something. Mon, 06 Sep 2010 15:13:55 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Max http://blog.wingedvictorydesign.com/2009/05/12/rev12-of-the-arduino-dmx-reception-software-released/comment-page-1/#comment-48 Max Fri, 22 May 2009 04:49:44 +0000 http://blog.wingedvictorydesign.com/?p=591#comment-48 Clever idea, but AnalogRead() has 1024 values, so you would have to get within +/-5mV = .1% to get an accurate reading. Standard resistors vary within 5% out of the box, and also are affected by temperature. You could do it reliably by dividing up the 9 switches among 3 analog input pins, I guess. Or, hardcode the address in the software and put a sticker with the address on the unit. :) Clever idea, but AnalogRead() has 1024 values, so you would have to get within +/-5mV = .1% to get an accurate reading. Standard resistors vary within 5% out of the box, and also are affected by temperature.

You could do it reliably by dividing up the 9 switches among 3 analog input pins, I guess. Or, hardcode the address in the software and put a sticker with the address on the unit. :)

]]> By: Jack http://blog.wingedvictorydesign.com/2009/05/12/rev12-of-the-arduino-dmx-reception-software-released/comment-page-1/#comment-47 Jack Fri, 22 May 2009 04:25:35 +0000 http://blog.wingedvictorydesign.com/?p=591#comment-47 I was thinking with a set of 9 different resistor values each a power of 10 or so from the previous and a typical dip switch setup - wouldn't it be possible to get the address from an analog pin accurately? I think it is really helpful to easily tell from the switch positions the address of the DMX device itself and that would be a way to do the addressing only using one analog input pin. I was thinking with a set of 9 different resistor values each a power of 10 or so from the previous and a typical dip switch setup – wouldn’t it be possible to get the address from an analog pin accurately? I think it is really helpful to easily tell from the switch positions the address of the DMX device itself and that would be a way to do the addressing only using one analog input pin.

]]> By: Max http://blog.wingedvictorydesign.com/2009/05/12/rev12-of-the-arduino-dmx-reception-software-released/comment-page-1/#comment-38 Max Wed, 13 May 2009 22:26:26 +0000 http://blog.wingedvictorydesign.com/?p=591#comment-38 Oops! I fixed the calc now. Thanks for the catch, Rick. Oops! I fixed the calc now. Thanks for the catch, Rick.

]]> By: Rick Regan http://blog.wingedvictorydesign.com/2009/05/12/rev12-of-the-arduino-dmx-reception-software-released/comment-page-1/#comment-34 Rick Regan Wed, 13 May 2009 13:26:31 +0000 http://blog.wingedvictorydesign.com/?p=591#comment-34 The expansion of 246 is 0*256 + 1*128 + 1*64 + 1*32 + 1*16 + 0*8 + 1*4 + 1*2 + 0*1 . The expansion of 246 is 0*256 + 1*128 + 1*64 + 1*32 + 1*16 + 0*8 + 1*4 + 1*2 + 0*1 .

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