Toolbox

Dual-reading calipers with Imperial/SI units on same dial

Dual-reading calipers with Imperial/SI units on same dial

I don’t know how long they’ve been available, but Timothy J. Silverman’s lovely photo (uppermost) just alerted me to the existence of these dual-reading dial calipers that simultaneously report inches and meters on the main scale and the dial. I do remember wanting such an instrument a couple of years ago and Googling around trying to find one with no success. The version pictured immediately above (and, I think, in Timothy’s photo) is this Chinese model imported by TFT Tools, but many other models are available.

Webcam + CNC robot = high resolution scanner

Webcam + CNC robot = high resolution scanner

Tormach wants to sell you an upgrade package for your Mach3-compatible CNC robot that includes a 1.3M USB microscope with 220X optical magnification, a mounting bracket, and all the necessary software to turn your CNC equipment into a scanner. The cool part is they’ve also produced a video showing how to hack together a slightly-less-powerful system using a $20 pen cam and some free software that will let you make 2000 dpi scans limited only by the size of your CNC bed envelope. The “killer app” for this equipment is automatic reverse-engineering of parts, but you could also use it to easily scan maps, posters, artwork, or other oversize stuff. [via Hacked Gadgets]

How-To:  “Indestructible” 3-ring binder

How-To: “Indestructible” 3-ring binder

When I was a kid, I was very hard on school supplies, and I remember dreaming about “industrial grade” school supplies–Kevlar backpacks and, particularly, sheet aluminum binders with piano hinges. These days, you can actually buy such binders, but they are relatively expensive. So why not make your own? Instructables user cowscankill did, with a salvaged snap-ring mechanism and riveted leather hinges. I want one.