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--- avr:t44:insoled [2013/12/16 21:27] – [PCB] redox
+++ avr:t44:insoled [2014/01/30 08:34] (current) – removed redox
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-# InsoLED
-## Overview
-In a few words, it's a LED-based PCB exposure box. Most designs of PCB exposure boxes are based around UV-tubes, or a lot of 5mm UV leds. I chose to try with 1W UV-LEDs. The design aims to be:
-* Portable
-  * Not fragile, like UV-tubes are.
-  * Small, since I rarely need to expose an A4-sized PCB.
-  * Big enough for standard sizes of PCB, I chose to go with 100x160mm which is already more than what I'm used to.
-* Easy to use
-  * Autonomous: Put your PCB in, start, come back when it's done
-  * Adjustable, since different PCB, traces sizes, ... require different exposure parameters.
-* Easy to make
-  * Don't reinvent the wheel, at least at first... I chose to go with a cheap LED driver from eBay instead of building one.
-  * Use cheap, easy to source, generic parts...
-  * Use common, on-hand tools and materials
-* Expandable: Need a bigger one? Just add some LEDs and make a bigger case.
-* Safe: Yeah, this one too... Enclose the UV stuff.
-## Pictures
-{{:avr:t44:dsc_0178.jpg?direct&150}} {{:avr:t44:dsc_0180.jpg?direct&150}} {{:avr:t44:dsc_0181.jpg?direct&150}}
-{{:avr:t44:dsc_0183.jpg?direct&150}}
-* The first one is the first prototype, on a breadboard, with a Teensy2.0 instead of an Attiny44
-* The next two are the actual prototype (there was a mistake on the PCB, involving a quick fix to get the backlight)
-* The last one is the Power Interface to drive the LEDs, it's a phototransistor (4n35), followed by a N-Channel Power MOSFET. And yes, this is ... messy, but it works as expected, so I might integrate it in the next revision of the PCB
-<note tip>The PCB of the Timer was made on the prototype of the exposure box ^^</note>
-## PCB
-### Version 1
-{{:avr:t44:insoledv1.jpg?direct&300|}}
-I haven't built this one...
-### Version 2
-{{:avr:t44:insoledv2.jpg?direct&300|}}
-There's a small mistake the LCD Backlight must go o GND and not to Vcc...
-### Version 3
-__To be continued__
-## Case
-{{:avr:t44:revalpha.png?direct&200 }}
-The case is made of PVC (and PMMA for the bottom I think) cut on a small CNC.
-I first made a design on Catia V5, to see where to place the LEDs and stuff, and then redesigned the parts on Galaad, which was a good training exercise.
-The top is still to be defined, but I think it'll be in two parts, one to hold/hide the electronics, the other, on hinges, to hold the LEDs and allow access to the PCB that's being exposed.
-## SVN Repository
-Right now, that's the only resource available. The whole project is under GPLv3, so feel free to improve it.
-    svn co http://svn.redox.ws/svn/InsoLED