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Double Xacto
From the MAKE Flickr photo pool

Ranjit needed a specific tool, so he made it -

…a double-bladed knife for cutting channels in tape. (Thanks to the tape goddess for encouragement!) I’m gonna try to use it to make flexible circuit boards from copper tape.

Construction method: jam two blades in one handle. (Use a jeweler’s screwdriver to wedge the handle slot open to accomodate them.)

Surely such a thing existed already, but I couldn’t find one. I imagined a super-deluxe double-knife that architects would use, with a thumbscrew for adjusting the inter-blade distance and everything.

This could likely also be used carving peel-able areas on 1oz copper board for no-etch circuits – my new invention… on Flickr

Collin Cunningham

Born, drew a lot, made video, made music on 4-track, then computer, more songwriting, met future wife, went to art school for video major, made websites, toured in a band, worked as web media tech, discovered electronics, taught myself electronics, blogged about DIY electronics, made web videos about electronics and made music for them … and I still do!

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