So just did a full board with the new UV lightbox, and it came out pretty good. Need to do something better with the sodium…Leave a Comment
So, that took longer than I thought it would… Once I put the whole thing together, with the controller board and power board, it didnt…Leave a Comment
So after a little bit of tinkering with the code, changing round the pin assignments mainly, I built up a permanent version of the board…Leave a Comment
Now, this is why i love the state of electronics at the moment – especially hobby grade ones. I can go from an idea on a piece of paper, to a working prototype, in… about 3 hours? Something like that. Anyway, in the time its taken since the last post, I have built and coded my Light Box controller, or at least prototyped it on a breadboard.
The breadboarding was actually the easy part – as you can see there are 5 buttons, 9 LED’s, a big Darlington Transistor, and an Arduino (and battery, but thats just for portable power). The buttons, from left to right are: Reset, Pause, Go, Up, and Down, and the LED’s are (again from left to right): Power, Go, 8 minutes, 4 minutes, 2 minutes, 1 minute, 30 seconds, and Array. The array LED is just as a place holder until I actually hook this up to the UV Array I have built (more on that in another post).
So when this is running, the timer counts down (in binary) in 30 second intervals. You can set it to the nearest 30 seconds using the up and down buttons – up to 15 minutes 30 seconds, and down to 30 seconds. The reset button sets it back to 8 minutes, although only when it is paused. The timer can be paused, and will turn off the UV Array when doing so, which would allow you to move or adjust something in the box. This will also allow for the simple addition of a switch to detect if the door is open, although in my current box that is pointless… the door never actually shuts.
The code for this is below (click the read more link to see it!)
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So setting out to improve my home PCB manufacturing, I am going to build a timer controller for my UV light box – using an…Leave a Comment
So after a bit of experimentation, turns out its less the strength of the sodium hydroxide that matters, more the temperature. Using a water bath…Leave a Comment
Currently sat in my garage, waiting for a UV photo resist board to be exposed – trying it at 8 minutes. This is after our…Leave a Comment