Sciencemadness Discussion Board

UV lamp for TLC

amrhamed2 - 3-6-2008 at 12:57

I just wonder if I can use the UV lamps which are used in water sterilization systems for this task ..........
http://www.premium-water-filters.com/uv-water-filters.htm

It states that the uv lamp wavelength is 234 nanometers

If not ,what shall I use as an economic source for uv???

Fleaker - 3-6-2008 at 17:35

NERV is working on an easily made 100W UV bulb from a cheap commercial mercury vapour lamp. He plans on using it for his TLC plates and for photohalogenation.

Magpie - 3-6-2008 at 17:48

Take a look at the 100w mercury vapor security lamp I reassembled:

http://sciencemadness.org/talk/viewthread.php?tid=8695&p...

Klute - 3-6-2008 at 18:12

Those aquarium lamp would be just perfect. But a cheaper options are the "eprom erasers" sold in informatics places (i have no idea of what an eprom is, and why you would want to erase the poor thing with UV :) ), where they sell equipment to etch your own boards circuits. Some small models are very cheap, and work perfect with 254nm TLC plates.
I made myself a little wooden box to insatll th etube with a ballast and satrter and all, and protect myself from the UV's, but with a space to slide the plates and see/mark the spots without been exposed. Cost me 15E at most!

OT: EPROM

12AX7 - 3-6-2008 at 18:21

Quote:
Originally posted by Klute
But a cheaper options are the "eprom erasers" sold in informatics places (i have no idea of what an eprom is, and why you would want to erase the poor thing with UV :) )


Roughly speaking, an EPROM is a silicon chip consisting of CMOS circuits and insulated gates which store charge representing on and off states. Essentially, by shining ionizing radiation on the chip, these charges are momentarily shorted out and the EPROM is erased. You may've seen one before, as the foil or tape covering the glass window is distinctive among integrated circuits.

Back on topic, it's fortunate, then, that they need such ionizing radiation, eh?

Tim

Klute - 4-6-2008 at 15:50

Thank you for the explanation! Indeed, it's then a good thing to irradiate the little buggers :) Beware, eproms, here we come :D (i can't help picturing them like those little fury bears in Starwars, forgot their name)

Sorry for the off topic, couldn't resist :D

[Edited on 5-6-2008 by Klute]

stoichiometric_steve - 6-6-2008 at 11:49

Quote:
Originally posted by Klute
i can't help picturing them like those little fury bears in Starwars, forgot their name


ewoks :) they rule!