I'm new at this electronics hobby, but...
I used the purple iron-on type of transfer film for my NOPPP and "84 on a
board" PCB with the Radio Shack etch solution.
I was surprised at how well the board turned out (small print lettering was
very clear) and I did both as a two sided board.
No lights required, just the household iron.  Did discover it's a must to
use a straight thru feed laser printer (or copier) not one like the HP4 that
moves the paper all around rollers on the inside. Jamming cause the waste of
several (expensive) 1/2 sheets of film.
Malcolm
----- Original Message -----
From: Roman Black <fastvid@EZY.NET.AU>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Wednesday, March 28, 2001 12:59 AM
Subject: Re: [OT] UV light for photo-positive PCB


> Wojciech Zabolotny wrote:
>
> > > > When using photo-positive PCB, I need a UV light source to expose
the
> > > board.
> > > > Where can I buy this UV light? I saw in Home Depot a kind florecent
tubes
> > > > like those we use at home but violet in color (I suppose they give
UV
> > > > light). Can I use them?
> > > >
> >
> > Because the professional UV sources are rather expensive, I usually use
just
> > the radient element from the mercury-discharge lamp, obtained after
carefull
> > breaking the lamp's bulb.
> > Well, I don't know if it's really safe - it produces a lot of ozone.
> > Additionally one must remember about the choking coil. Once I had no the
> > proper one, so I used the 100W incadescent lamp instead - the result was
a
> > quite good RF noise generator ;-). The radio reception was quite
impossible
> > in my room.
>
>
> Hi Wojciech, I would like to hear more about this.
> So this was a mercury discharge HID lamp, that has
> the tiny clear tube inside the big globe? Don't
> they get really hot? How many watts was the lamp?
> This sounds pretty clever if you can get it safe and
> reliable.
> :o)
> -Roman
>
> --
> http://www.piclist.com hint: PICList Posts must start with ONE topic:
> [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads
>
>
>

--
http://www.piclist.com#nomail Going offline? Don't AutoReply us!
email listserv@mitvma.mit.edu with SET PICList DIGEST in the body