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PCB Fabrication
30 September 2009
Author: Giorgos Lazaridis
PCB Photographic Artwork Transfer UV Cabinet


Until now, to transfer the artwork to a photosensitive board, i used a pair of UV lamps. Although they worked pretty well, i thought of upgrading my lab. Thus, i designed and made a prototype photographic artwork transfer box using UV LEDs:

















Check out the project worklog where i have written down all the details and the difficulties that i came up with during the preparation of the box. Most interesting.

Also, check out the very first test-run of the box, before it is 100% complete.
















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Comments

  • At 26 January 2012, 0:33:20 user Kammenos wrote:   [reply @ Kammenos]
      • @miniyo69 @miniyo69 if you are using the same encoder with me, then the 3 pins that are on the same side are used for the rotation. the middle one goes to the pin 36, and the other 2 to pins 37 38.
      On the other side, the 2 pins are for the button action.

  • At 25 January 2012, 20:43:56 user miniyo69 wrote:   [reply @ miniyo69]
      • hi nice work!! i have a problem i don't know how to connect the rotary enconder and the start stop please anyone can help me

  • At 15 January 2012, 3:41:50 user Kammenos wrote:   [reply @ Kammenos]
      • Ok people, i searched (and searched) and finally found the eagle files for this project. You will find them in page 6 of the worklog.

  • At 12 January 2012, 9:56:54 user Daniel Abrantes wrote:   [reply @ Daniel Abrantes]
      • Hi!!Nice work you done!!!Can you tell me what is the value of the resistors in the led panel?Can you give me the schematics to build it??

      Best regards
      Daniel Abrantes

  • At 14 December 2011, 21:26:04 user Darryl wrote:   [reply @ Darryl]
      • add another to the list of who would be interested in the BOM and Eagle PCB files.

      Thanks!

  • At 13 December 2011, 18:00:38 user D-The Greek wrote:   [reply @ D-The Greek]
      • Superb...my mouth just dropped to the floor.

  • At 12 October 2011, 13:08:35 user Kammenos wrote:   [reply @ Kammenos]
      • @George sorry, i must have lost them. I will look again next week when i return from business trip.

  • At 12 October 2011, 1:04:24 user George wrote:   [reply @ George]
      • Was so impressed I\'m going to make one for myself.
      Have already ordered the UV Leds, if it\'s not to much to ask, could you post the eagle files as well, it will save a lot of work.

  • At 11 May 2011, 2:24:38 user matt wrote:   [reply @ matt]
      • Hi, I too am excited about this project and was wondering if you uploaded the bill of materials yet. I am mostly interested in where to buy the UV LED's, diffuser sheet, acrylic glass, and photo-sensetive PCB.

      Your site has helped me so much. Thank you for sharing these projects to everyone and in such great detail.

  • At 22 April 2011, 1:26:01 user Kammenos wrote:   [reply @ Kammenos]
      • @seb no you are not. there isn't any. i will upload one within the next few days (and the eagle files because you cannot make this through the schematic).

  • At 22 April 2011, 0:33:51 user seb wrote:   [reply @ seb]
      • I don't know if I'm blind but I'm unable to find
      the bill of materials and PCBs.
      Regards

  • At 5 April 2011, 14:32:43 user Kammenos wrote:   [reply @ Kammenos]
      • @herctrap they are not silver, it is the photograph that shows them like this. they are normal copper color.

  • At 5 April 2011, 2:20:54 user herctrap wrote:   [reply @ herctrap]
      • why the pcbs are silver and not gold?

  • At 10 October 2010, 10:28:10 user vitya wrote:   [reply @ vitya]
      • Thanks, I must be blind... Thanks anyway!!

  • At 10 October 2010, 4:16:37 user Kammenos wrote:   [reply @ Kammenos]
      • vitya, in the 6th page of the project, i have upload all the firmware in assembly and hex. The routines are there.

  • At 8 October 2010, 3:50:06 user vitya wrote:   [reply @ vitya]
      • Geia!
      Can you please send me a sample program (in assembly) for a PIC to work with this rotary encoder? I cannot get it to work... :(
      Thanks!

  • At 23 January 2010, 15:12:12 user Kammenos wrote:   [reply @ Kammenos]
      • Lyncos, the LEDs emit 25 degrees angle, half the angle is 12.5 degrees. If d=the distance of the LED, then the radius (NOT diameter) of the circle that will appear on that distance is:
      r = d x TAN[12.5]
      The diameter is 2xr. So, in your case that the distance is 30cm, the circle radius that will be created is:
      r = 30 x 0.221 = 6.6cm.
      The diameter is 13.3 cm. I tested this calculation and is precise, as long as the LED emit 25 degrees ray.

  • At 23 January 2010, 14:50:45 user Lyncos wrote:   [reply @ Lyncos]
      • Thanks for the answer. I made my first run yesterday and everything went fine the first time... I have 30 leds as described before with a spacing of about 14 mm at about 30cm high. 5 Minutes later I got a perfect print on my circruit board... It took me 1 month to not even figure out the toner transfer method (never worked for me) .. I will ALWAYS use the photo resist method ... Now I'm waiting for 2 packs of 100x 7000 mcd leds to make bigger circuits.


      Now it's a temporary installation but I'm planning doing a box for it, I would like to lower the height of the installation cause for 2 side circuits it will take too much space... I think I can go half of the height...


      Also I would like to know the formula you used to find out the best spacing/ heigt of the led.. I have a good Idea with triangles formula but would like to know how you done it


      thanks a lot

  • At 21 January 2010, 0:46:43 user Kammenos wrote:   [reply @ Kammenos]
      • Hello Lyncos,

      I used the same LEDs. 1/2'' is a good distance, although i would suggest to you an even smaller distance.

  • At 20 January 2010, 23:50:23 user Lyncos wrote:   [reply @ Lyncos]
      • I started a similar project... what kind of led are you using ? I have 400-405nm, 2000mcd, 5mm leds you think it will works ? I\'m planing doing it with 30 leds 5x6 and about .5 inch spacing.. I will do very small PCB with this first version... I\'m waiting for 200 390-395nm leds for my larger version

      what you think about it ?

      Thanks

  • At 9 January 2010, 4:13:11 user just-3 wrote:   [reply @ just-3]
      • Great idea! Keep up the good work!

  • At 24 November 2009, 8:16:57 user totek wrote:   [reply @ totek]
      • what's the power consumption?

  • At 7 November 2009, 17:22:21 user Kammenos wrote:   [reply @ Kammenos]
      • I am convinced that it will work. The diffusion filter works perfect! This is just a prototype for try-and-error. If it does work, i will make a better one

  • At 7 November 2009, 9:31:32 user choco wrote:   [reply @ choco]
      • Looks good. I just want to see the results in the pcb with the leds.


     

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