GMU:Sensor Hacklab/Christian Doeller: Difference between revisions

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[[File:Alu_Karton2.jpg]]<br><br>
[[File:Alu_Karton2.jpg]]<br><br>


I first planned to use a resistor ladder for the Analog input pin of the arduino in order to minimize <br> the amount of pins being used.<br><br>
I first planned to use a resistor ladder for the Analog input pin of the arduino in order to minimize the amount of pins being used.<br><br>


[[File:Schematic_Raster_Styro.jpg]]<br><br>
[[File:Schematic_Raster_Styro.jpg]]<br><br>
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[[File:Alu_Resistor_Ladder2.jpg]]<br><br>
[[File:Alu_Resistor_Ladder2.jpg]]<br><br>


As this did not work out (too many delays in the code, too slow, a lot of noise) I changed the design <br>by attaching a separate wire to each of the eight „circuit lanes“ that go to the Arduinos digital input.<br>
As this did not work out (too many delays in the code, too slow, a lot of noise) I changed the design by attaching a separate wire to each of the eight „circuit lanes“ that go to the Arduinos digital input.<br>
Now there are 6 + 8 = 14 wires coming out of the carpet. 6 of them are used as „digital out HIGH signals“<br> and the other 8 are used as „digital in, normally LOW“ pins that check if a button is pressed.<br>
Now there are 6 + 8 = 14 wires coming out of the carpet. 6 of them are used as „digital out HIGH signals“ and the other 8 are used as „digital in, normally LOW“ pins that check if a button is pressed.<br>