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I purchased a high wattage CO2 laser and this blog was created to chronicle my progress.
Wednesday, March 24, 2004
ELECTRONICS: Using Eagle layout software
Having a really good experience with the circuit design so far. The eagle software is rock solid. I used it to output a description of all the wire networks. I wrote a perl program that parsed the wire networks file from Eagle, and combined it with the locations of the chip positions on my wire wrap board. The perl program outputs a file of the networks as wirewrap locations on my board, and I had the same program create a drawing that shows the chips.
This file is the eagle formatted file. Remember, the software is free. Eagle writes eps files, which I converted to pdf using illustrator.
Here's the my wirewrap board:
The blue tape marks are placeholders for chip positions which correspond to the boxes in the drawing.
This file is the eagle formatted file. Remember, the software is free. Eagle writes eps files, which I converted to pdf using illustrator.
Here's the my wirewrap board:
The blue tape marks are placeholders for chip positions which correspond to the boxes in the drawing.
Sunday, March 14, 2004
ELECTRONICS: Eagle schematic layout software
I found this really wonderful software from Eagle. It is ergonomic, free and runs on linux. It has a really nice part library. Unbelievably, I made this circuit in a day:

It does an incredible job of allowing you to hook up the parts and then re-organize the layout without breaking any connections. It exports files that lists all the parts and networks. I'll be able to parse the network file and use it to tell me the right pins to tie together on my wirewrap board.

It does an incredible job of allowing you to hook up the parts and then re-organize the layout without breaking any connections. It exports files that lists all the parts and networks. I'll be able to parse the network file and use it to tell me the right pins to tie together on my wirewrap board.
Saturday, March 13, 2004
ELECTRONICS: Submitted large digi-key order
I submitted this order to digikey.
This requried doing an analysis of the pico systems universal control board suggested wiring diagram, a jam circuit, and a pwm module
This also required excessive analysis of the connectors that will be required for this system which I did by producing this diagram:

(dwg version).
I also used this diagram to support construction of the one above:

And since there's no such thing as ordering everything at once, I put in another order.
Remember that
296-1408-5-ND is part MC3486N which is a SN75172-equivalent
296-7038-5-ND is part MC3487N which is a SN75173-equivalent
This requried doing an analysis of the pico systems universal control board suggested wiring diagram, a jam circuit, and a pwm module
This also required excessive analysis of the connectors that will be required for this system which I did by producing this diagram:

(dwg version).
I also used this diagram to support construction of the one above:

And since there's no such thing as ordering everything at once, I put in another order.
Remember that
296-1408-5-ND is part MC3486N which is a SN75172-equivalent
296-7038-5-ND is part MC3487N which is a SN75173-equivalent