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Registered Member #223
Joined: Mon Feb 20 2006, 06:42PM
Location: Ottawa, Ontario, Canada
Posts: 125
very nice.. I have never used photodeveloping for etching my boards. It must make life a lot easier. I still do it the old school way and thats using etchant resistant tape. It's a real pain so most of my circuits I just solder up on protoboard.
Also I tried to visit the 'reverse engineering' and 'small gadgets' page and they are both 404.
Registered Member #177
Joined: Wed Feb 15 2006, 02:16PM
Location: Munich, Germany
Posts: 214
THX. Yes, it definatley makes life a lot easier. But I need some good new layouts soon, I just tested it with some B/W pictures until now.
Yeah sorry, they are there but I didn't translate them so they are not activated. Try the german version (deutsche version) for some pictures. and check back later. should be translatet until next week.
Registered Member #135
Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
One of the problems I ran into with multiple lamp fixtures was uneven exposure to the pcb. You may notice this when you start doing boards. It will have some well defined areas, then hazy areas. I think this is due to interferrence patterens much like that of the double-slit experiment. What I did to get around this is to use a sheet of plastic diffusor and it solved that problem. Other then using a light fixture, exposure to sunlight for 10 minutes works well if you don't have much money after buying the photo boards.
I also couldn't recommend sensitizing the boards yourself unless you're an expert spray painter. The spray stuff is really runny and I couldn't get even covarage.
Registered Member #177
Joined: Wed Feb 15 2006, 02:16PM
Location: Munich, Germany
Posts: 214
Hazmatt_(The Underdog) wrote ...
One of the problems I ran into with multiple lamp fixtures was uneven exposure to the pcb. You may notice this when you start doing boards. It will have some well defined areas, then hazy areas. I think this is due to interferrence patterens much like that of the double-slit experiment. What I did to get around this is to use a sheet of plastic diffusor and it solved that problem. Other then using a light fixture, exposure to sunlight for 10 minutes works well if you don't have much money after buying the photo boards.
Actually i don't have that problem yet. The lamps are strong enough though, so I could do that in the future for large boards maybe.
Hazmatt_(The Underdog) wrote ...
I also couldn't recommend sensitizing the boards yourself unless you're an expert spray painter. The spray stuff is really runny and I couldn't get even covarage.
Yeah, I never tried to, but lots of peole say there are better things to do with spare time
Registered Member #288
Joined: Mon Mar 06 2006, 07:52AM
Location: Palmerston North
Posts: 32
I guess you have heard of toner etching and there is a reson why you don't use it.
If you havn't I seriously recommend you give it ago. I tried for the first time a few days ago and was surprised. I could easily create PCBs which had two tracks running between adjacent pads of a DIP16 chip, and crsystal clear font 4 text, all with a laser printer!
Registered Member #177
Joined: Wed Feb 15 2006, 02:16PM
Location: Munich, Germany
Posts: 214
Yeah I know that technique, but I don't own a laserprinter. This device here works with transparent paper instead of foils. The transparent paper is the kind, that is used by architects for sketches, it's cheap though.
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UV Lamp for PCB etching
