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6. electronics design (Mar 5, 2014)
Redraw the echo hello-world board
I followed this tutorial for PCB design with Eagle. Eagle
includes some modules: Schematic Editor, Layout Editor, and
Screen capture of Eagle.
In this week assignment I added a 6mm tact switch and a chip LED
on the echo hello-world board.
Schematic in Eagle.
Board Layout in Eagle.
Then I exported the board layout (select the only the "Top"
layer) as a png file. I opened the png file, traced the
outlines, and exported as DXF file with drawing software, and
subsequently imported DXF file and made NC tool paths with
TypeEdit, an industrial CAD/CAM software.
I engraved the PCB board by using CNC router with a conical mill
at the cutting depth of 0.1 mm and tool diameter of 0.3 mm.
Engraving the PCB board. Modificated echo hello-world
Finally, I soldered some electronic components to the board by
soldering iron, tweezers, flux, and lead-free solder alloy.