Homebrew PCBs

On Sun, 19 Feb 2012 18:23:54 +0000, you wrote:

>On 19/02/2012 18:00, Harvey White wrote:
>
>>
>> I dislike jumpers, so the effort of making a separate layer is often
>> worth the added step. Since my main techniques involve thin board
>> epoxied together to make a dual sided board, I effectively make two
>> boards to get one, but I can remake the "bad" one easily.
>>
>> Last run was 10 board sides, two stepper motor drivers, breakout board
>> for a PCB drill, back panel for same, and a power distribution board.
>> You pays your money.... etc.
>
>I can usually design boards so that very few jumpers are required. With 
>double-sided boards soldering all the links through the vias is worse 
>than a few jumpers! :)

I'd agree to that, but I'm likely to have more jumpers than either of
us care to think about.  Mega256 and a VQFP 100 chip for video, or
FPGA and the same.  Definitely not a jumperless project.  I think
you're not designing the stuff I am playing with.

(some details at www.dragonworks.info with probably pictures of
various boards.  Look at the color LCD display, for example)

>
>>  >As I've said several times, I get excellent positive transparencies with
>>  >a cheap HP 9540 inkjet printer and JetStar Premium film.
>>
>> I'll have to try that, and see if JetStar Premium is available here.
>> That's when I start in with the photoetch, of course.
>
>Farnell stocks it, but only in the A3 size, for some strange reason. 
>Since I cut it to size it doesn't matter. They stock the ordinary 
>JetStar (I used to use that with a lower-res Epson inkjet) in A4. Mega 
>Electronics will probably send you a sample sheet if you ask them 
>nicely, they sent me one. Otherwise, I could post a piece to you.

Thanks for the offer, but I'll wait until I'm ready to start
photoetching before I start investigating.  

Harvey

>
>Leon