[Alt-photo] Re: 365 nm. UV-densitometer.

[andy schmitt]

Erich...
I so look forward to a good do-it-yourself'er ... especially in the
winter...
maybe I can build a new box for my department at Peters Valley School for
Craft...

thanks!
Regards
andy

-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf Of
Erich Camerling
Sent: Tuesday, October 22, 2013 5:00 AM
To: Alt Photo
Subject: [Alt-photo] 365 nm. UV-densitometer.

You -do-it-yourself means :

1 : you have to make your own printed circuit boards or you must have a
friend who can make them for you. ( our print-drawings you can have via 
      the internet for free at the end of this series of articles) When a
specialized company will make the printed circuit boards it will cost 
you lot of      money  I suppose.

2 : You have to buy  all the components  yourself (or have a
friend........) ( we will give you a detailed list on internet for free)

3 : Don't start with this DIY project when you don't have sufficient
knowledge of electronics e.g.. you cannot "read" (=  understand) a wiring
diagram and don't have a good small soldering iron and/or never used such an
iron for soldering small parts like IC's , resistors , capacitors etc.

4 : The complete paper will contain 7  chapters : 1 : power supply ,
2 : electronic  "clock factory" ,
3 : LED driver ,
4 : sensor
5:  inversion circuit
6 : other things as  : DVM
7 : software

5 : For printing the print-drawings you need a laser printer or an inkjet
printer and associated film.I need two identical transparencies on top of
each other because the density of one transparency was too low at my inkjet
printer to reach a good result.

6 : BEFORE starting the project you MUST have ( and use !!) a pair of
spectacles with polycarbonate glasses ( see the reason for that at : 
www.opticampus.com/tools/transmittance.php : " polycarbonate" spectral
transmittance ) to protect your eyes against the tremendous and dangerous
amount of UV-light.
I bought an "UVEX Hi-res super OGT " pair of glasses ( EUR 20.= ) .When you
know another one ( better and/or cheaper )  it is of coarse also okay.
Please let me know.

7 : The transparencies are designed by my friend with Eagle V.5.11 prof .
You need the FREEWARE version from
www.cadsoftusa.com/download-eagle/freeware/ to become the possibility to
print the print-drawings , electronic diagrams etc.

To be continued next week.

PS. I realise there will be a problem because it is not permitted to add
attachments ( such as wiring diagrams ) to the e-mail on this site.
        What will be the best solution for this problem for alt-photo
members ?
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