Voltage multiplier

We have a nice foot shear down in the machine shop, and an old crappy cheap rusty hand brake/shear thing in the corner. The good foot shear has a sign on it DO NOT USE FOR FR4 so I have to use the horrible old one.

John

Get a small bandsaw and a very fine pitch blade, and an upright belt sander with a nice, large, flat platen sitting next to it.

Absolutely smooth, straight finished edges,

Brakes and shears are for metal.

Glass is harder than steel. That is why a glass cutter does not actually make "a cut" in the glass, and why they dull. You can actually sharpen a knife with a big piece of FR4. I have some

0.3" x 1.25" x 6" 'sticks' of it, and it really works almost as good as a razor strap.

Dremel cut-off wheel works too (bigger is available), though considerations must be made to handle the particulate created.

On a sunny day (Fri, 30 Sep 2011 12:01:26 -0700) it happened John Larkin wrote in :

I thought you wanted 128 bit 100 cores?

>

lem.

ome

something like this works magic on fr4, not sure if you might be able to use water with fr4 to keep the dust down

f=3Ddp_cp_ob_diy_title_3

-Lasse

Wow, that's intense. I have a set of aircraft shears with serrated blades that I've been cutting FR4 with for a decade. They still work fine, although not too many of my cuts are that straight. (Of course, in a dead bug prototype, wiggly cuts aren't usually the main aesthetic issue...)

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058

hobbs at electrooptical dot net
http://electrooptical.net

Never thought of that. I have a wet saw, though I don't very often cut FR4 at home. Yes, keeping the dust down is important. I'm sure your lungs would appreciate it. However, FR4 will pick up water.

I occasionally grab a 12x12 sheet of copperclad FR4 and shear it up into an assortment of different sized squares, and keep them in a baggie in my office, for breadboarding. The shear is fast, quiet, clean, and makes beautiful cuts.

John

How about this?

ftp://jjlarkin.lmi.net/Core_304bits.jpg

A 304 bit RAM.

John

On a sunny day (Mon, 03 Oct 2011 12:51:25 -0700) it happened John Larkin wrote in :

Why magnetic? This saves power: