Conductive Wire Drawing Tool (1st Iteration)

When I applied for Pier9 residency back in 2016, I made a circuit on glass with wires and UV glue . During my residency I was planning to make a tool to simplify the process but I shifted my focus to another project. But now, here is some progress I've made. It is not perfect and there is room for improvement in every step, and I hope this will be helpful for anyone interested in making similar circuit.

This project does not need much fabrication and it was more like a assembly of existing stuff.

1. Wire and dispenser. I used a MECHANIC brand FBX08S dispenser. It dispenses very thin enameled wire. But a thicker bare wire should work better according to my experiment.
2. High viscosity surface-curable UV glue. The one I used was LEAFTOP 9311 that has 12000 mpa.s viscosity that flow like honey and the exposed surface can be cured fairly tack free. A even thicker glue might be able to create a better thicker coat.
3. A disposable nozzle. Mine is not UV blocking but a opaque one should be better.
4. UV light
5. Drawing surface and parts.

First we assemble the dispenser as instructed on manual. We do not use the original nozzle as it will be single use. Here I used a cone shaped nozzle, lead the wire through, inject UV glue into the front of the nozzle (2nd image) and put nozzle on. So the wire would be coated with UV glue when pass through. Then we cover the entire nozzle with tape to prevents glue inside nozzle to cure, especially the opening. I used 3M Scotch 33+ Super Vinyl Electrical Tape but it will leave dirty marks if you try to drag the side across a surface, so another better tape should be used.

Then you can drag the dispenser across the surface and glue the wire down. Note you should make sure the wire is pushed against the surface so the glue can actually stick the wire to the surface, rather then just cure around the wire. Use UV light to cure the glue. I was hoping the draw and cure at the same time but there isn't enough glue on the wire, so I have to draw a line, push it down and then cure.

Once you finish, manually add glue on stress points to make them stronger.

After curing the wires, we can solder circuits. In this simple experiment, I soldered 2 small pieces of bare wire for easier power supply, and soldered an LED for the demo. I've used a bottom entry surface mount LED, because it has exposed solder pad on the light emitting side.

And the LED can be turned on! Hooray!