On Apr 6, 11:05=EF=BF=BDam, "Aly" <,shfskf...@sliuflky4iuhdf.erl> wrote:
> Hello,
>
> Ideas please?
>
> A small professional UV box with two 8W tubes will cost about =A3100, and=
is,
> professionally made and neat and tidy. =A0I'm wondering if for sake of ea=
se it
> would be easier to just go out and buy one?
>
> I've seen the UV "fly killer," tubes on eBay for say =A310, which are
> mentioned in a few of the tutorials online. =A0Ballasts I have at home
> somewhere. =A0Would need a neat little case, cut glass, switches, bits bo=
bs,
> and time.
>
A photo frame and a sunny day works for me. Just dont get caught
taking her picture out of it.
Reply by Aly●April 9, 20072007-04-09
"Leon" <leon355@btinternet.com> wrote in message
news:1175868015.832931.293210@y80g2000hsf.googlegroups.com...
>
<SNIP>
>
>I use an HP 5940 printer with JetStar premium film, results are
>excellent.
>Leon
Hi Leon,
Noted :-) I'm going through this right now planning for what happens next.
JetStar film from Rapid is the likely candidate.
Thanks again, spotted your post here in a Google search.
Alison
Reply by Aly●April 7, 20072007-04-07
"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in message
news:vkfg13l5pkeo1sf55iveshkc858tq5e4ei@4ax.com...
>
<SNIP>
>
> Yet the UK and Ireland are doing very well economically, much better
> than mainland Europe.
>
> I took my kid to a baseball practice and asked the coach if she could
> try out for the team. He told her "go to left field" and that was it.
>
> John
>
>
Most of the money coming here doesn't really exist, it's all offset by the
amazing amounts of debt people are in.
House prices may be �250k for a modern terrace, yet most of the possessions
owned, cars sofas kitchens this that, are all bought on credit. Thus making
it look like there's more disposable income, when in reality there isn't.
Also we have alot of foreign money coming into the country, again further
stimulating the current debt culture in an effort to afford everyday living.
We're a bit like that bus at the end of The Italian Job with all of the gold
balancing in it.
Pleased to hear your DD did ok. Quite inspiring that. :-)
Alison
Reply by John Larkin●April 7, 20072007-04-07
On Sat, 7 Apr 2007 22:30:59 +0100, "Aly"
<,shfskfjsf@sliuflky4iuhdf.erl> wrote:
>"rickman" <gnuarm@gmail.com> wrote in message
>news:1175979153.190803.303150@p77g2000hsh.googlegroups.com...
>> On Apr 6, 6:05 am, "Aly" <,shfskf...@sliuflky4iuhdf.erl> wrote:
>> > Hello,
>> >
>> > Ideas please?
>>
>> I guess this idea is also not in the spirit of DIY, but getting PCBs
>> made has gotten pretty inexpensive lately. I saw an ad the other day
>> for a double sided board with plated through holes for $26 even at qty
>> 1 for a first time customer. Olimex in Europe has some very low rates
>> for small quantities, but I have not looked into them in detail.
>>
>> Is this a cost thing or just a fun thing to make your own PCB lab?
>>
>
>UK prices are hideously expensive, like �200+ ($400) for 5 eurocards with a
>2-week turnaround. Trouble with Olimex is that I'm not giving my credit
>card number to anyone in Bulgaria nor using Western Union.
>
>The problem with the UK is that it's just such total rip off. I was charged
>�13 ($26) the other day for buying something in the States costing �22.
>This country is just a dump.
>
>Looking at UV tubes right now.. �10 for single 12" UV tube. �10!! That's
>the cheapest round here where I can just walk in and buy. If I go to
>B&Q/Homebase they're about �20 and in fancy packaging with party goers all
>over them.
>
>I dumped a load of laptop LCD screens at the rubbish tip the other day and
>had some jobsworth telling me I'd put them in the wrong bin, "they're LCD
>screens," I said pointing at the big plasma displays in there. He wanted me
>to put them in the metal bin as they were computers. Erm, no, they're all
>plastic you argumentative turd. "Do you want me to dump them in a lay by
>perhaps?" That's what all the sane people are doing. Go for a walk in the
>countryside, trip over a saucepan!
>
>I HATE this bloody country. :-( Where I can't send my kids out to play
>football without some council official bringing them home saying they don't
>have insurance. Wot!! Insurance.
>
>*rants*
>
>:-) That was meant to be slightly humourous of course. But really, the UK
>has just gone mad. You can't do anything if it isn't approved, stamped and
>monitored.
>
Yet the UK and Ireland are doing very well economically, much better
than mainland Europe.
I took my kid to a baseball practice and asked the coach if she could
try out for the team. He told her "go to left field" and that was it.
John
Reply by ●April 7, 20072007-04-07
"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in message
news:ijmd13djua55gfekp3lqt8bunr601e1dfe@4ax.com...
keep in mind that the exposure will not be very uniform, and light
> will be coming in at all sorts of goofy angles.
>
> John
>
I'm very interested in this angles scenario I must say. I can imagine that
in alot of boxes the tubes are just too close. They're like 1-2cms from the
board. That can't be good.
At a guess I'd say 5cm is better yet I don't know what I'm talking about
admittedly. At 1-cm though, that's just too intense.
Reply by Michael A. Terrell●April 7, 20072007-04-07
Aly wrote:
>
> :-) That was meant to be slightly humourous of course. But really, the UK
> has just gone mad. You can't do anything if it isn't approved, stamped and
> monitored.
"Really mad cow disease in England:
Cow: I say old chap, MOOOO!!! ;-)
--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.
Michael A. Terrell
Central Florida
Reply by ●April 7, 20072007-04-07
"rickman" <gnuarm@gmail.com> wrote in message
news:1175979153.190803.303150@p77g2000hsh.googlegroups.com...
> On Apr 6, 6:05 am, "Aly" <,shfskf...@sliuflky4iuhdf.erl> wrote:
> > Hello,
> >
> > Ideas please?
>
> I guess this idea is also not in the spirit of DIY, but getting PCBs
> made has gotten pretty inexpensive lately. I saw an ad the other day
> for a double sided board with plated through holes for $26 even at qty
> 1 for a first time customer. Olimex in Europe has some very low rates
> for small quantities, but I have not looked into them in detail.
>
> Is this a cost thing or just a fun thing to make your own PCB lab?
>
UK prices are hideously expensive, like �200+ ($400) for 5 eurocards with a
2-week turnaround. Trouble with Olimex is that I'm not giving my credit
card number to anyone in Bulgaria nor using Western Union.
The problem with the UK is that it's just such total rip off. I was charged
�13 ($26) the other day for buying something in the States costing �22.
This country is just a dump.
Looking at UV tubes right now.. �10 for single 12" UV tube. �10!! That's
the cheapest round here where I can just walk in and buy. If I go to
B&Q/Homebase they're about �20 and in fancy packaging with party goers all
over them.
I dumped a load of laptop LCD screens at the rubbish tip the other day and
had some jobsworth telling me I'd put them in the wrong bin, "they're LCD
screens," I said pointing at the big plasma displays in there. He wanted me
to put them in the metal bin as they were computers. Erm, no, they're all
plastic you argumentative turd. "Do you want me to dump them in a lay by
perhaps?" That's what all the sane people are doing. Go for a walk in the
countryside, trip over a saucepan!
I HATE this bloody country. :-( Where I can't send my kids out to play
football without some council official bringing them home saying they don't
have insurance. Wot!! Insurance.
*rants*
:-) That was meant to be slightly humourous of course. But really, the UK
has just gone mad. You can't do anything if it isn't approved, stamped and
monitored.
Reply by rickman●April 7, 20072007-04-07
On Apr 6, 6:05 am, "Aly" <,shfskf...@sliuflky4iuhdf.erl> wrote:
> Hello,
>
> Ideas please?
I guess this idea is also not in the spirit of DIY, but getting PCBs
made has gotten pretty inexpensive lately. I saw an ad the other day
for a double sided board with plated through holes for $26 even at qty
1 for a first time customer. Olimex in Europe has some very low rates
for small quantities, but I have not looked into them in detail.
Is this a cost thing or just a fun thing to make your own PCB lab?
Reply by Mike Harrison●April 7, 20072007-04-07
On Fri, 06 Apr 2007 13:19:27 -0700, John Larkin <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:
>On Fri, 6 Apr 2007 11:05:04 +0100, "Aly"
><,shfskfjsf@sliuflky4iuhdf.erl> wrote:
>
>>Hello,
>>
>>Ideas please?
>>
>>A small professional UV box with two 8W tubes will cost about �100, and is,
>>professionally made and neat and tidy. I'm wondering if for sake of ease it
>>would be easier to just go out and buy one?
>>
>>I've seen the UV "fly killer," tubes on eBay for say �10, which are
>>mentioned in a few of the tutorials online. Ballasts I have at home
>>somewhere. Would need a neat little case, cut glass, switches, bits bobs,
>>and time.
>>
>>This is all purely for making the odd PCB so nothing commercial. There's
>>also those little UV nail boxes for curing the plastic, they're only about
>>�20 although I wonder about even coverage with those, and if indeed it is
>>the right type of UV?
>>
>>Circular tubes? U-shaped tubes? Straight tubes? Little 9W dual parallel
>>tubes?
>>
>>I'm just wondering in the end if it would be easier to just buy one,
>>although that's not really in keeping with the spirit of diy.
>>
>>Many thanks for any input, I'm just looking for ideas and opinons really.
>>I'd also be half tempted to put in regular tubes too so that it can be used
>>as a light box.
>>
>>Friendly regards,
>>
>>Alison
>>
>>ps. There's this one at Rapid for �110 in a little kit;
>>
>><http://www.rapidonline.com/searchresults.aspx?style=0&kw=34-0690>
>>
>
>A light box is about the worst possible way to expose pcb's. To get
>good resolution, you need sharp shadows hence collimated light. The
>typical light box is a maze of position-dependent blurs. The light
>source should be far away from the film and the board, not close.
If the artwork is in contact with the board ( ink-side up) this is really not a problem.
40-50 tracks/inch resolution is routinely do-able with a conventional light box.
Reply by John Larkin●April 6, 20072007-04-06
On Fri, 6 Apr 2007 21:35:34 +0100, "Aly"
<,shfskfjsf@sliuflky4iuhdf.erl> wrote:
>"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in message
>news:0cad13tc0ebsvgivto63oun40drdvn42ga@4ax.com...
>
><SNIP>
>>
>> A light box is about the worst possible way to expose pcb's. To get
>> good resolution, you need sharp shadows hence collimated light. The
>> typical light box is a maze of position-dependent blurs. The light
>> source should be far away from the film and the board, not close.
>>
>> Get a bright light with decent UV concentration. A 175 watt
>> warehouse-type mercury vapor lamp is ideal, and perfectly safe. Mount
>> it about 3 feet above a table and add a bit of foil on top if it
>> deosn't already have a reflector. Place the pcb, film, and a top piece
>> of glass or plexiglass, on the table. Try 10 minutes to start. This
>> will cast much sharper shadows than any light box can.
>>
>> A tanning lamp isn't bad, and they're cheap.
>>
>> The sun is pretty far away, too.
>>
>> John
>>
>>
>
>Hi John,
>
>Noted. Tell you what I do have.. A full size sunbed in the bathroom, hold
>on.. Eight 100W 6' tubes.
Yikes! Skin damage! Look good now, look like Brigitte Bardot later in
life.
>
>I've just been playing with the idea of fitting one of those small 25W 9"
>U-shaped tubes in a 12"x10"x5" flight case, or an 22W 8" circular tube.
>
>But with what you've said here it's made me wonder..
>
>Thanks again (and to everyone)
>
>Aly :-)
>
If you have proper emulsion-down film and good clamping to the board
(say, felt below and flat glass above) a light box can be OK. Just
keep in mind that the exposure will not be very uniform, and light
will be coming in at all sorts of goofy angles.
John