Elektronica Stynus
 

UV PCB Exposure box V3

If I had to expose a double sided pcb with my previous exposure box, I needed to turn it on twice. (1 time for the top, and 1 time for the bottom) To solve this problem it was time to build a new version. This new version will do the 2 side's at once.

 

This time I chose for LED's instead of fluorescent light, so I designed some pcb's to mount the leds on to. The pcb's will be connected per 6. This allows me to exposure pcb's off 20 * 30cm max. The top of the board has no solder mask. This works as a reflector.

http://image.elektronicastynus.be/81/1311520153.jpg

Soldered:

http://image.elektronicastynus.be/81/1311520176.jpg

Test:

http://image.elektronicastynus.be/81/1311520160.jpg

 

Then came the biggest work: The case make. To save space I didn't use the traditional flap open model but a kind of sliding model. Where the glass panels slide out.

http://image.elektronicastynus.be/81/1311520158.jpg

You can pull the upper plate up to insert the pcb between the glass sheets and to clamp it.

The base plate with spacers and two side plates::

http://image.elektronicastynus.be/81/1311520170.jpg

 

With the slider mounted:

http://image.elektronicastynus.be/81/1311520167.jpg

http://image.elektronicastynus.be/81/1311520161.jpg

 

Test with glass in it:

http://image.elektronicastynus.be/81/1311520182.jpg

 

I added some springs on the screws to make the hinges clamp the glass

http://image.elektronicastynus.be/81/1311522816.jpg

On the front I added some bulletsnaplocks.

http://image.elektronicastynus.be/81/1311627001.jpg

 

The top plate mounted with the buttons / lcd on the place where they should be mounted.

http://image.elektronicastynus.be/81/1311520164.jpg

 

For the power supply I used a 20V toroidal transformers. The voltage is a bit high, so I used some switching voltage regulators to power the led pcb's.

http://image.elektronicastynus.be/81/UV_PSU.png http://image.elektronicastynus.be/81/UV_PSU_PCB.png

http://image.elektronicastynus.be/81/1311626823.jpg

(One of the voltage regulators is still on order.)

 

I made a new timer to switch the light panels. This new timer remembers the last exposure time, so you don't have to remember it yourself anymore..

http://image.elektronicastynus.be/81/UV_Timer.png http://image.elektronicastynus.be/81/UV_Timer_PCB.png

http://image.elektronicastynus.be/81/1311626820.jpg

 

Build in the case:

http://image.elektronicastynus.be/81/1311626826.jpg

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Update 16/08/2011

The project is finished now.

 

Some pictures from during the build:

Spray painted the sides + bended a top cover plate.

http://image.elektronicastynus.be/81/1313516075.jpg

http://image.elektronicastynus.be/81/1313516087.jpg

Mounted the front plate:

http://image.elektronicastynus.be/81/1313516080.jpg

Inside:

http://image.elektronicastynus.be/81/1313516083.jpg

 

Finished:

http://image.elektronicastynus.be/81/1313409198.jpg

http://image.elektronicastynus.be/81/1313409216.jpg

 

Placed on the location of the old exposure box:

http://image.elektronicastynus.be/81/1313516073.jpg

http://image.elektronicastynus.be/81/1313516082.jpg

With the slide out:

http://image.elektronicastynus.be/81/1313516781.jpg

Open:

http://image.elektronicastynus.be/81/1313516787.jpg

Clamped PCB:

http://image.elektronicastynus.be/81/1313516784.jpg

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Available Products:

 

Timer bouwpakket
Timer PCB
UV belichtingsbak LED print bouwpakket
PIC16F628A UV belichtingsbak timer
Timer build kit
Timer PCB
UV PCB Exposure LED pcb build kit IC16F628A UV PCB Exposure timer
15V 25W voeding
15V 25W Power Supply

 

 

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Files

PCB files LED panels: Download

PCB files timer: Download

PCB files power supply: Download

Code timer: View / Download.

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