Wednesday, September 24, 2008
DIY UV lamp for PCB exposure
YouTube via MusicMiK. Posting this one for the DIY aspect of it all. You might remember MusicMiK form these videos.
"No directly synthesizer related stuff today, as i'm currently building a new tool - an ultraviolet lamp for creating PCBs by exposing the photosensitive coating to this UV light later.
See more about the construction here:
http://www.mik-music.org/tiki/gallery53
This unit is not yet completed, i need to build a powerful Step-Up converter for about 80V and 0.6A to feed the LEDs, which are chained in 30 chains of 22 LEDs each. Besides this, some more mechanical work is needed and a timer will also be built in. And of course - safety. You don't want to look into a 40 watts 400nm UV light source accidentally :)"
4 comments:
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Why would anyone want to bother with photo etching anymore? That system went out in the 80s for the most part.
ReplyDeleteMost DIY folks use the photo-transfer method now. But with the low cost for bare bones services from Advance and such I even question if it is worth it to mess with nasty etchant anymore.
http://www.4pcb.com/index.php?load=content&page_id=132
Maybe a good deal, true. But here in Germany, you don't get any prototype PCBs done for less than about 30 EUR. And ething at home is a good way for a final-check of the layout.
ReplyDeleteWe are talking about 1, 2, maybe even 10 boards. No mass production. DIY stuff. It's a bit mor comfortable than veroboards.
Understand, but again why bother with photo etching when you can do toner transfer which is way easier and cheaper. Check out Press-N-Peel
ReplyDeletehttp://www.wonderhowto.com/how-to/video/how-to-create-a-pcb-with-the-toner-transfer-method-237547/
http://www.techniks.com/
But I question if you can DIY for less than 30 EUR after you pay for etchant, toner transfer (or photo transfer) a bubbler, tank, etc. Your first board may cost $100, then perhaps $10 each after that. Given that $43 (30 euro) isn't so bad.
Here in the US you can do double sided drilled for $10-$20 each if you don't want solder mask or silk screen.
Maybe toner transfer comes next :)
ReplyDeleteSome months ago, i didn't think about creating PCB at all.
Besides this, this lamp will also be used for my silkscreen stuff for front panels and so (i know, there also exist other ways to do front panels...)
A DIY PCB doesn't cost a lot. Tried this out recently. 100 sheets of overhead foil - 14 EUR, first try worked, i don't think i need more than 2 for one board. Chemicals - just some bucks. Bubbler - not needed. Time - half an hour (without drilling).
The most time consuming task is the drilling, but it's just my time.
If i need 10 boards of one type, i test it at home with one, then let the others make by the pros. As said - not intended for mass production, this is just a hobby setup. The time layouting a PCB is much more than the rest of the work and the costs are really low.
Besides this - i have my fun with it and i can say "i did all this on my own" :) My hobby isn't doing any mass production of synthesizers, my hobby is development and building those things - usually all units are unique, maybe i build a second one for a friend or so.