Thursday, October 30, 2008
Puddle to the Metal
I don't normally blog mere links, but with progress being so rapid recently we'll revivify the metal-inlay extruder very soon so we can do electricity. So here are some materials that we could use for that:
Note that one would also be able to cast just about all of these in a silicone mould.
Labels: multiple materials
Are you sure it isn't listed as ohm-cm? That's the usual way to list resistivity.
In that case, you can figure the resistance of your conductor by (for example) dividing out the layer thickness in cm, then multiplying by the number of squares the electricity must pass though.
A 20 cm-long track, laid out in squares 5 mm wide, comes out to 40 squares. Same goes for 20 mm x 0.5mm. So a layer of 0.1 ohm-cm material deposited 1mm thick will have 1 ohm-per-square layer resistance, giving 40 ohms for this hypothetical 40-square conductor.