UV Board
by charlespax, published
Description
UV Box Kit
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1 laser cut kit
1 top, laser cut 1/4 inch clear arcylic
1 bottom, laser cut 1/4 inch clear acrylic
1 curcuit board kit
1 PCB
1 mini USB, SMD
48 UVA LED 0603 (~410 nm)
48 200 Ohm resistor 0603
4 spacer 1/4 inch
4 thumb screw
PCB Construction Kit
--------------------
1 UV Box Kit
2 developer, 5 g bag
2 etchant, 5 g bag
1 tinning solution
3 Lock & Lock containers
6 Fotobard, 3x4 inch, single-sided
6 Fotoboard, 3x4 inch, double-sided
1 rubber gloves, pair
1 example mask book, 3x4 inch masks
1 Arduino mask
1 goggles
1 sponge
1 photographic paper pad
UVA LEDs
-------
-http://www.alibaba.com/product-gs/216309397/0603_UV_SMD_LED.html
-$0.0735 each
-http://cgi.ebay.com/100PCS-0603-Ultra-Bright-SMD-Purple-LEDs_W0QQitemZ380175467368QQcmdZViewItem QQptZLH_DefaultDomain_0?hash=item5884394368
-$0.19 each
-http://cgi.ebay.co.uk/100-BRIGHT-UV%2FPURPLE-0603-SMD-LEDs-SMT-LED-100mcd-603_W0QQitemZ260316739549QQcmdZViewItem QQimsxq20091013?IMSfp=TL091013156004r32688
-$0.234 each
-http://www.phenoptix.co.uk/UV_PURPLE_SMD_0603_LED_p/smd-uv-0603-100.htm
-$0.20 each
-http://www.niktronixonline.com/0603_SMD_LED_UV_Purple_Ultra_Bright_100_mcd_p/0603smduv.htm
-$0.40 each
-http://ledmuseum.home.att.net/leduv.htm
-http://www.ec21.com/offer_detail/Provide_SMD_UV_LED--2142957.html
-http://www.giant-supplier.com/0603smdLED.htm
-http://yesled.com/eh/product_info.php/cPath/21_29_201/products_id/634
200 Ohm Resistors
-----------------
-http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=311-200GRTR-ND
-$0.001863 each
-http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=P200GTR-ND
-$0.00243 each
Spacers
-------
-http://www.wclco.com/Plastic_Components/Spacers_Washers.php
-WCL Fastening Facts
-1.800.331.3816
-Catalog page: wclco.com/pdf/plastics/075-077.pdf
Lock & Lock Containers
----------------------
-http://www.amazon.com/Lock-Piece-Rectangular-Value-Pack/dp/B001AS5VYQ/ref=pd_sim_k_4
-"Lock & Lock 1.4 Cup 8 Piece Rectangular Value Pack"
-$4.33 each
-http://www.amazon.com/Lock-Shrinkwrap-Square-Value-Storage/dp/B001ASAIRQ/ref=sr_1_12?ie=UTF8&s=home-garden&qid=1258338207&sr=1-12
-$5 each
-http://www.amazon.com/2-5-CUP-SQUARE-LOCK/dp/B00167REFU/ref=sr_1_115?ie=UTF8&s=home-garden&qid=1258338553&sr=1-115
-"2.5 CUP SQUARE LOCK N LOCK"
-$3.79 each
-http://www.organize.com/squarecuplock.html
-3.99 each
Plating
-------
-http://www.cool-amp.com/prices_order.html
-Silver plating powder
-$30.00 for 3 oz.
rapidonline.com/Tools-Fasteners-Production-Equipment/PCB-Equipment/Etching/Tin-plating-crystals/29475
-11.58 for 90 g
Notes
-----
-http://www.pcbfx.com/ makes a Fab-in-aBox kit. They also sell toner sensitive foil.
Recent Comments
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I used to work with UV LEDs as a light source for optical inspection, and we managed to push our LEDs way beyond their nominal limits by cranking the voltage up to eleven and strobing the lights. They tend to creep farther into the UV at higher voltages, and they're brighter. It might be that the photoresist won't like strobed light, but it's worth a try.
That's what I read when I first started the project. I tested my photoresist PCB with and without the acrylic and did not see a difference. However, both exposures did not produce perfect results.
The poor results may have been due to the coating on the boards. Some of the boards had discolored areas when new. It could also be the LEDs did not produce UV light at the frequency needed for the boards even though the specs of the LEDs and boards matched.
Acrylic blocks UV. Compare it with and without the top by shining it on something fluorescent.
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Acrylic blocks UV. Compare it with and without the top by shining it on something fluorescent.
That's what I read when I first started the project. I tested my photoresist PCB with and without the acrylic and did not see a difference. However, both exposures did not produce perfect results.
The poor results may have been due to the coating on the boards. Some of the boards had discolored areas when new. It could also be the LEDs did not produce UV light at the frequency needed for the boards even though the specs of the LEDs and boards matched.