59: Paint Your Own Circuit
I bought some Bare Conductive Electric Paint for 6 £. I envisioned drawing elaborate circuit boards (including multilayered!).
The device is about 4" long. It is also billed as "conductive glue." And it may be better for that than for drawing because to draw you have to keep squeezing the tube (like glue) -- and that makes it hard to draw a uniform line. Here's my trivial example:
The 3 images:
1) poke holes in card stock and insert components
2) squeeze out conductive goop
3) wait 15 minutes for it to dry; add current
SO close!
(and for that price you could buy a breadboard)I'm still hopeful about making circuits with a 3D printer.