Monthly Reminder, please read: Subject lines: Remember to change the subject line if you are straying from the original thread. Please change the subject line...
Hi All, I am thinking of selling the T-Tech units I got and making my own etcher. what software do you all use to create the lines around traces for milling...
I'm a bit curious. I've read online about Photo Etch setups, and one thing that seems popular is an acid solution that grows as you use it, basically it uses...
... I've tried etching thin copper and brass shim with ferric chloride and found it's a *lot* harder than the copper on pcb. Think its got something to do with...
Hi, As a fun project I thought I would build a Large Format Camera to use for 2:1 reductions of artwork for PCB's. I bought a book From Lindsay " Simple Large...
One thing you must take into account is chromatic abberation. So if you just make this using a simple lens you may run into problems of fuzzy edges even at the...
It would be a lot easier to by a used process camera than to try and build your own system for reduction. There are lots of business' closing doors in this...
If you check around you might be able to find an old offset press camera for very little, they were used to make the plates. It seems a computers, scanners and...
... If you have trouble with spherical aberration from a simple lens construction, then making the aperture smaller will fix that (card-board with hole against...
Hi, I have a lens which came from a 3'x3' process camera. It is 210mm focal length. Is this information any use? I used lithe film when I did my boards that...
Russell, I keep forgetting that unlike production optics, a home brew design has the flexibility to increase illumination. I don't know that I'd use cardboard...
... The gaussian form of the lens equation is: 1/f = 1/d(source) + 1/d(target), so the film should be 315mm from the lens and the pcb printout should be 630mm...
Has anyone seen the new Epson 960 printer? It can handle 1.5 mil posterboard and also print on CD Roms so it might be able to use a thin pcb material. I was...
Has anyone used Autocad for designing PCB for surface mounted technology? Can anyone send me a dwg with blocks for designing PCB for SMT with autocad? Thanks...
Someone on the Seattle Robotic list said he recharges his FeCl. Here's what he said: ***************** I have not thrown out FeCl in 12 years. I keep...
In a message dated 2/14/2003 12:00:09 PM Central Standard Time, ... are the nails +? Or, do you mean you used nails for both electrodes??? Jan Rowland ...
It's actually the HCl (hydrochloric acid) which combines with the copper to form CuCl2 + H. This is why it's not a good idea to etch on a stove -- hydrogen...
... He seemed to mean nails for both sides. It is in the part you trimmed: "One terminal corrodes away (putting the Fe back), the other terminal plates out...
Try it on small scale and see if it works. I wonder where all the iron ions go ? Iron goes in and none comes out !. My guess is you end up with lots of...
I've seen some posts here about people doing the Laser Printer heat toner-transfer to PCB with the special sugar coated paper, but I've been doing it for quite...
I'm not sure. It's really cheap paper that was lying around. I've done it with all sorts of paper and it seems to work. The cheaper "low weight" paper...
I have found that thin glossy paper soaks off most easily - something like the paper use for Time magazine pages. Maybe a paper expert can tell me what...
... Thanks. Some comments and questions about the procedure: * Don't recommend steel wool. It can leave little bits of steel in the copper (which become...
I recall long ago in one of the hobby electronic magazines there was an article that suggested using glossy thin magazine pages. That is an ultrasmooth clay...
