An electro-graf is a graffiti piece or throw-up that uses conductive spray-paint and magnet paint to embed movable LED display electronics. The following pages describe the materials and processes used to create the prototype indoor and outdoor interactive electro-grafs created in the lab at Eyebeam.
After you have chosen a location and time to execute your piece, you need to apply the magnet paint. If you are using the Magic Wall paint indoors, you can just apply the paint with a brush or roller. You need to paint on 2-4 coats for a reliable, robust magnetic attraction.
If you intend to add a topcoat to the electro-graf, like in the case of the prototype indoor electro-graf, you need to put masking tape on the circuit stencil to create contact pads. These are where the LED leads or the wires will make contact with spray-on conductive traces and close the circuit.
Once you have taped the contact pads, you can apply the topcoat.Now, you can use an exacto blade, tweezer or small screwdriver to remove the tape over the contact areas. Once the tape is removed, use the multimeter to test the traces conductivity and resistance.
Components like wire, LEDs and circuit boards can be taped, epoxied or screwed into the wall. Another option is to create a metallic surface on the wall (using magnet paint) and then modify the electronic components by adding rare-earth magnets.I have developed a simple technique for attaching magnets to LEDs using old, used exacto knives.
Now you can put the LEDs on the wall, connect the power supply and any control electronics and turn it on. Depending on your design this could take a second or hours.
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