UV Light
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Posts: 46,084
Greetings!
Possibly a bit off-topic, but anyhow...
I need to make a small and accurate PCB, so can't use my usual 'draw it
with a felt-tip pen' method, but must use photo-resist and
transparencies.
The chemicals and PCB's I can afford, but...
The lamp I saw on sale was a bit out of my price range at the moment(Had
a few unexpected expenses :-), so I was wondering...
Can a UV Lamp used to erase EPROM's be used instead?
The PCB I'm planning to make will fit comfortably in the UV chamber, and
it have a neat little timer.
:-)
Trygve
Possibly a bit off-topic, but anyhow...
I need to make a small and accurate PCB, so can't use my usual 'draw it
with a felt-tip pen' method, but must use photo-resist and
transparencies.
The chemicals and PCB's I can afford, but...
The lamp I saw on sale was a bit out of my price range at the moment(Had
a few unexpected expenses :-), so I was wondering...
Can a UV Lamp used to erase EPROM's be used instead?
The PCB I'm planning to make will fit comfortably in the UV chamber, and
it have a neat little timer.
:-)
Trygve
Comments
piece. They fit in a standard lamp fixture.
I was wondering about using UV LEDs. They look the same color as my lamps.
Paul
> Greetings!
>
> Possibly a bit off-topic, but anyhow...
>
> I need to make a small and accurate PCB, so can't use my usual 'draw it
> with a felt-tip pen' method, but must use photo-resist and
> transparencies.
> The chemicals and PCB's I can afford, but...
> The lamp I saw on sale was a bit out of my price range at the moment(Had
> a few unexpected expenses :-), so I was wondering...
>
> Can a UV Lamp used to erase EPROM's be used instead?
> The PCB I'm planning to make will fit comfortably in the UV chamber, and
> it have a neat little timer.
>
> :-)
> Trygve
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and Body
of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
OK, ya'll, at 7:51 PM +0200 10/20/03, Trygve Henriksen wrote:
>
>The lamp I saw on sale was a bit out of my price range at the moment(Had
>a few unexpected expenses :-), so I was wondering...
>
>Can a UV Lamp used to erase EPROM's be used instead?
>The PCB I'm planning to make will fit comfortably in the UV chamber, and
>it have a neat little timer.
>
>:-)
>Trygve
--
Chuck Britton Education is what is left when
britton@n... you have forgotten everything
North Carolina School of Science & Math you learned in school.
(919) 416-2762 Albert Einstein, 1936
able to use sunlight for this purpose with some excellent results.
Jim
http://www.geocities.com/jimforkin2003/
Original Message
From: Trygve Henriksen [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=LCcO5EbfXVTU_ffR2kLiFpVzT4ibcohdMNUT4Z9ghhrDj-m6li3uoBpFsQYI_bwBsq71NVD1fPxkIZp7H9UfvCVjBRh4Rg]trygve.henriksen@v...[/url
Sent: Monday, October 20, 2003 1:51 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] UV Light
Greetings!
Possibly a bit off-topic, but anyhow...
I need to make a small and accurate PCB, so can't use my usual 'draw it
with a felt-tip pen' method, but must use photo-resist and
transparencies.
The chemicals and PCB's I can afford, but...
The lamp I saw on sale was a bit out of my price range at the moment(Had
a few unexpected expenses :-), so I was wondering...
Can a UV Lamp used to erase EPROM's be used instead?
The PCB I'm planning to make will fit comfortably in the UV chamber, and
it have a neat little timer.
:-)
Trygve
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[noparse][[/noparse]Non-text portions of this message have been removed]
jim
http://www.geocities.com/jimforkin2003/
Original Message
From: Jim Forkin [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=_prdI8sv5xyC9L_DurbPnwt2sO__oQMDxq9PecSxfSLp2LJ2KRbboxNmv8WdXMRkUIcTlI-yxa3MkQ]jjf@p...[/url
Sent: Monday, October 20, 2003 3:49 PM
To: basicstamps@yahoogroups.com
Subject: RE: [noparse][[/noparse]basicstamps] UV Light
it's crude, and a little unpredictable, but, several years ago, I have been
able to use sunlight for this purpose with some excellent results.
Jim
http://www.geocities.com/jimforkin2003/
Original Message
From: Trygve Henriksen [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=QnMUGhGOsAXVjrftvafZScfSzb61wZqhUlCnaDJ5ahxTbHtZsrBcEy0Off6FUXVLbbRlAW3BMKtUYfDuBhG0HgFvXRg]trygve.henriksen@v...[/url
Sent: Monday, October 20, 2003 1:51 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] UV Light
Greetings!
Possibly a bit off-topic, but anyhow...
I need to make a small and accurate PCB, so can't use my usual 'draw it
with a felt-tip pen' method, but must use photo-resist and
transparencies.
The chemicals and PCB's I can afford, but...
The lamp I saw on sale was a bit out of my price range at the moment(Had
a few unexpected expenses :-), so I was wondering...
Can a UV Lamp used to erase EPROM's be used instead?
The PCB I'm planning to make will fit comfortably in the UV chamber, and
it have a neat little timer.
:-)
Trygve
To UNSUBSCRIBE, just send mail to:
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[noparse][[/noparse]Non-text portions of this message have been removed]
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ready to do this myself for a (27c801 - 1Megx8 stand alone
WAV player) I put together to play "Don't Smile at a crocodile"
for my daughter's Ferris-Wheel. In the past I have used
'PNP-Blue', but this time around I thought I would use the
photo approach.
Thanks!
-Beau Schwabe
>I've also used a standard sun lamp bulb in a desk lamp to do this.
>jim
>http://www.geocities.com/jimforkin2003/
>
>
>
Original Message
>From: Jim Forkin [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=QAnmYMqZGN2Uc7ZqWJjD8hO4okFNiV_xVHE1wYaBTUP9PWL7yVv1nJ7Q_GDmxo-_szBtQkkr]jjf@p...[/url
>Sent: Monday, October 20, 2003 3:49 PM
>To: basicstamps@yahoogroups.com
>Subject: RE: [noparse][[/noparse]basicstamps] UV Light
>
>
>it's crude, and a little unpredictable, but, several years ago, I have been
>able to use sunlight for this purpose with some excellent results.
>Jim
>http://www.geocities.com/jimforkin2003/
>
>
>
Original Message
>From: Trygve Henriksen [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=9kgGTdQ__4o-RManEOpau3Tk_gaNcO8xfTFxnbsiHkOrMxIIoowMILQGzz1LhmpBBO9_4uz8SSRwBEPAKHs1bOyYd2hbaA]trygve.henriksen@v...[/url
>Sent: Monday, October 20, 2003 1:51 PM
>To: basicstamps@yahoogroups.com
>Subject: [noparse][[/noparse]basicstamps] UV Light
>
>
>Greetings!
>
>Possibly a bit off-topic, but anyhow...
>
>I need to make a small and accurate PCB, so can't use my usual 'draw it
>with a felt-tip pen' method, but must use photo-resist and
>transparencies.
>The chemicals and PCB's I can afford, but...
>The lamp I saw on sale was a bit out of my price range at the moment(Had
>a few unexpected expenses :-), so I was wondering...
>
>Can a UV Lamp used to erase EPROM's be used instead?
>The PCB I'm planning to make will fit comfortably in the UV chamber, and
>it have a neat little timer.
>
>:-)
>Trygve
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
>[noparse][[/noparse]Non-text portions of this message have been removed]
>
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
and a "full spectrum" tube for it. These work fine with MG chemicals
photosensitive boards. The boards claim something like 8 minutes exposure, I
find these work great at around 15 minutes with the Borg florescent. Your
mileage may vary.
There is a Yahoo group for making homebrew pcbs.
http://groups.yahoo.com/group/Homebrew_PCBs/
>
Original Message
> From: Trygve Henriksen [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=3C1uDbHDHTZRLSbfbfXZkSowJUprNNXAHnvHNax7kYjodsBaJc75_zvi57zApFWXsw21Qv8XoP9oG_Hr9b4hGW91naiDaw]trygve.henriksen@v...[/url
> Sent: October 20, 2003 10:51 AM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] UV Light
>
>
> Greetings!
>
> Possibly a bit off-topic, but anyhow...
>
> I need to make a small and accurate PCB, so can't use my usual 'draw it
> with a felt-tip pen' method, but must use photo-resist and
> transparencies.
> The chemicals and PCB's I can afford, but...
> The lamp I saw on sale was a bit out of my price range at the moment(Had
> a few unexpected expenses :-), so I was wondering...
>
> Can a UV Lamp used to erase EPROM's be used instead?
> The PCB I'm planning to make will fit comfortably in the UV chamber, and
> it have a neat little timer.
>
> :-)
> Trygve
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the
> Subject and Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
> Any 'time frames' here as far as exposure time? I'm getting
> ready to do this myself for a (27c801 - 1Megx8 stand alone
> WAV player) I put together to play "Don't Smile at a crocodile"
> for my daughter's Ferris-Wheel. In the past I have used
> 'PNP-Blue', but this time around I thought I would use the
> photo approach.
>
>
> Thanks!
> -Beau Schwabe
>
Try these folks for questions:
http://www.injectorall.com/
I use an old UV lamp I have around and use exposure times of a couple of
minutes but it is hard to give advice because you may keep the lamp at a
different distance and everything changes.
The people at injectorall told me to use a 4 min. exposure in bright sun as a
benchmark to test my set up. If that does not produce results something else is
wrong (developer etc.)
Good luck Uwe
to check the process. Take a strip of pc board material and cover all but a
short piece at one end. expose for 30 seconds, uncover a bit more and
expose for 30 seconds, then a bit more and expose for 30 seconds until you
have used the entire strip. Then, develop the board and check the results.
You now have a pattern that corresponds to the exposure times and you can
the tell what the exposure should be on your set up. Mark the distance from
the lamp face and other details on the back of the board and you now can
duplicate the results without testing again. Temperature or the developer
is also to be considered in your note.
Good luck, but, in reality, it's more trouble than it's worth. Just design
the boards and order from a board house such as Advanced Circuits
(www.4pcb.com) for only $33 a prototype.
jim
http://www.geocities.com/jimforkin2003/
Original Message
From: othello159 [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=wxTV5lI0f3LMPyhnpfLhFUgEcpN7xTYMujjGprEIN7hfgG-Y6HdG70uIQJ4JLTzaIzdifOcwjWOlPItC]othello159@h...[/url
Sent: Monday, October 20, 2003 11:43 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Re: UV Light
--- In basicstamps@yahoogroups.com, "Beau Schwabe" <bschwabe@a...> wrote:
> Any 'time frames' here as far as exposure time? I'm getting
> ready to do this myself for a (27c801 - 1Megx8 stand alone
> WAV player) I put together to play "Don't Smile at a crocodile"
> for my daughter's Ferris-Wheel. In the past I have used
> 'PNP-Blue', but this time around I thought I would use the
> photo approach.
>
>
> Thanks!
> -Beau Schwabe
>
Try these folks for questions:
http://www.injectorall.com/
I use an old UV lamp I have around and use exposure times of a couple of
minutes but it is hard to give advice because you may keep the lamp at a
different distance and everything changes.
The people at injectorall told me to use a 4 min. exposure in bright sun as
a benchmark to test my set up. If that does not produce results something
else is wrong (developer etc.)
Good luck Uwe
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
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