1, 2 , 3

It would be cool to have a 3D printer that would fab an enclosure and paint conductive traces, anywhere on surfaces or even internal to insulating structures. May as well do colors and labels too.

Right. Once you can print the substrate and the traces, multi-layer PCBs are a very short step. I'm really surprised it hasn't happened already.

That would be really cool... nearly instant prototypes without all the noise of one of those milling-machine types. The last one I saw in action was housed in an old teletype enclosure ;-) ...Jim Thompson

In college, we had a lathe sort of thing that cut circuit boards from a 1:1 master (paper and tape). At both my PPoE and CPoE, they have the milling type machines. Neither has been used in the time I've been there. I just use the one at the CPoE as a source of copper clad.

We had one of those PCB milling things for a while. Got rid of it.

Our Tormach does a decent job on FR4, but it's still too much hassle.

For a quick proto, do it by hand, x-acto on FR4. Anything more complex, buy a proper plated-through board.

Holy crap! That's some beast!

Sure. I do it all the time. The retractable knives from Techni-Tool work really well, *much* better than anything from X-Acto that I've tried.

The matching scribe works well, too.

It's great.

Really cool is a Dremel loaded with a carbide dentist's burr. They are cheap on ebay.

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I build a pcb milling machine from various ebay find and it works quite wel l and in eagle it is a single script to do gcode for outlines

but for anything serious you might as well go all the way, make a proper sc hematic, layout and get a pcb made, even four layer prototype are crazy cheap now

you can now get a machine that does PCBs with laser:

I've heard the price is $140,000 plus shipping, that is a lot of PCBs

-Lasse

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for the mill try these:

-Lasse

I have no problems cutting lines fine enough for 0603 or even 0402 resistors with the above knife. The blades last fairly well, too (but aren't cheap ($.60 each, IIRC).

Something doesn't seem quite right about that seller... Sells milling bits *and* lingerie modeled by a real doll...

The item might be what you were talking about, but that just screams hacked-account and scam to me.

I once bought a particularly cheap Arduino which never showed up. Looked back at the reviews of the seller, and they were great when they sold beads and jewelry. After they started selling Arduinos, they stopped shipping anything.

Tormax_Coilcraft.JPG

I use aliexpress as they use a escrow account setup. Seller doesn't get paid until you receive merchandise.

On Sat, 22 Feb 2014 16:30:26 +0000, Jan Panteltje wrote: []

I got one very similar to this:

except mine is the Yugoslav army version calibrated in Grays and microGrays. I was going to build one, but since you can pick these up for around a hundred bux off ebay there didn't seem much point. To test, I opened up an old smoke alarm to expose the tiny pellet of americium 241 (a good alpha particle source) inside. With the beta and gamma shields out of the way, I'm reading between 100 and 400 microGrays; the actual figure depends very heavily indeed on precisely how close to the source you hold the probe; activity quickly falls away the further away the probe is and the activity field is virtually nil by the time you're an inch or more away from the pellet. Just thought this might be useful to you in roughly calibrating yours, or at least finding out if it's working at all!

On a sunny day (Sun, 23 Feb 2014 13:49:29 +0000 (UTC)) it happened Cursitor Doom wrote in :

Hi, nice video, I have some old mil counters (different tube) with calibration source too. This GM tube and circuit is already tested, on 24/7 and logging to the PC via RS232, here an older picture with mil probe and other GM tube:

Apart from the calibration sources I tested this tube with some thorium welding rods, try it sometimes :-), also radium glass marbles etc. uranium, radium, see some here, also very old,

Later I made a nice small gamma spectrometer with a Russian PMT:

We have a professional PCB milling machine at work. It is used a lot and we get quick turn around PCB times, even for high density parts

I just bought a chinese model for my own lab:

Will be using it for metal milling also

Can't wait for it to arrive :-)

Cheers

Klaus

t end, on the left,

ks ), as it still needs a round hole made,

se to be, took a while to make it all fit.

ock in.

e flashlight switch was,

nd paint

ing

buy a

ell

schematic, layout and get a pcb made, even four layer prototype are crazy

The LPKF laser milling machine is AFAIR 30.000 USD

Cheers

Klaus

What do you do about vias?

This is a Sherline

which is great for engraving and light machining of small stuff.

Amazon has a bunch of cool Sherline stuff.

The LPKF has chemical vias. We cannot use that due to regulations, so we just mill a hole and use a special via pin that is meant for this procedure

Nice machine

Cheers

Klaus