GMU:Bioelectronics, aesthetics and other interesting things/PhyChip synthesiser: Difference between revisions

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* PWM or Pulse-width modulation is a modulation technique used to encode a message into a pulsing signal, eg for getting analog results with digital means. "Digital control is used to create a square wave, a signal switched between on and off. This on-off pattern can simulate voltages in between full on (5 Volts) and off (0 Volts) by changing the portion of the time the signal spends on versus the time that the signal spends off. The duration of "on time" is called the pulse width" (arduino).
* PWM or Pulse-width modulation is a modulation technique used to encode a message into a pulsing signal, eg for getting analog results with digital means. "Digital control is used to create a square wave, a signal switched between on and off. This on-off pattern can simulate voltages in between full on (5 Volts) and off (0 Volts) by changing the portion of the time the signal spends on versus the time that the signal spends off. The duration of "on time" is called the pulse width" (arduino).


== Examples ==
== Physarum plates ==
Utilised coated 35 mm petri dishes in a 3 row x 2 column arrangement. Every plate was treated with an aluminium mesh with a resistance of 0.5 Ω-cm. The mesh is separated by the plate walls. In front of each cell a 4 x 3 mm aluminium finger was placed to create the contact areas. Physarum resistance was around 1300-1500 Ω·cm. On top of each plate added a 3 mm agar 2% concentration for placing the physarum.
 
<gallery>
image:petri-dish-6-plates.png|Petri dish with 6 plates
image:distribution-physarum-early-stage.png|Distribution of the physarum network early stage
image:distribution-physarum-final-stage.png|Distribution of the physarum network final stage
</gallery>
 
== Performance / Video documentation ==
Live performance at ACUD, Berlin, 27 Aug 2015
Live performance at ACUD, Berlin, 27 Aug 2015
https://www.youtube.com/watch?v=AZPDet-0ER0
https://www.youtube.com/watch?v=AZPDet-0ER0
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* https://soundcloud.com/lessnullvoid/sets/phychip-slime-mould-music
* https://soundcloud.com/lessnullvoid/sets/phychip-slime-mould-music


== Physarum plates ==
== Hacking the modules==
Utilised coated 35 mm petri dishes in a 3 row x 2 column arrangement. Every plate was treated with an aluminium mesh with a resistance of 0.5 Ω-cm. The mesh is separated by the plate walls. In front of each cell a 4 x 3 mm aluminium finger was placed to create the contact areas. Physarum resistance was around 1300-1500 Ω·cm. On top of each plate added a 3 mm agar 2% concentration for placing the physarum.
https://www.youtube.com/watch?v=yQ-atWiMzKY
 
<gallery>
image:petri-dish-6-plates.png|Petri dish with 6 plates
image:distribution-physarum-early-stage.png|Distribution of the physarum network early stage
image:distribution-physarum-final-stage.png|Distribution of the physarum network final stage
</gallery>


== References ==
== References ==
Retrieved from "https://www.uni-weimar.de/kunst-und-gestaltung/wiki/GMU:Bioelectronics,_aesthetics_and_other_interesting_things/PhyChip_synthesiser"