electronics_production

download files

• hello.ISP.44.res.traces.png
• hello.ISP.44.res.traces.ai
• hello.ISP.44.trace.png
• hello.ISP.44.interior.png
• hello.ISP.44.trace.rml
• hello.ISP.44.interior.rml

First version

I followed the tutorial of Fab isp.

Mill&Cut

I Downloaded a ping of boad and make rml data for milling by fabmodule.

As a preparation, I put a plate on the work table and shaved the plate for making a horizontal plane.. Then I placed board on it　and pasted with double-sided tapeI set a blade on the milling machine. I used an end mill 60 ° for trace and an end mill 90 ° for outline. First set the origin. I moved the position of the blade using the operation panel and bring it to the position where I want to set the XY origin. I lowered the blade, stop where the sound changed, press the "set xyz origin" button on the operation panel and set it as Z origin. When lowering the blade speed slow down like "high speed" → "low speed" → "10 steps". There is also a method of detecting zero-in using a sensor, but it is better not to use it when I use a thin mill because there is a fear of breakage.

I used Roland MDX-40.

I made a mistake several times.

• I could not set up the zero in well and set the deep place as the origin, the board was cut too much, and the line of the circuit did not remain.
• I did not set the zero in after changing the mill to scrap outline, so I got deeply scraped.
• I set the XY origin without calculating the value of the offset, so it stuck out the board and shaved it.

built board

I picked components up.I did not know electronic components, so I learned it.

• "res" and "R" is resistor.It makes current difficult to flow.It prevents the flow of electricity and makes it the amount suitable for the circuit.
• "D" and "zener"is diode (zener is a kind of diode).It protect circuit from over voltage by keeping voltage constant.Convert from AC to DC, prevent reverse flow, to regulate the flow of electricity
• "C" is capacitor.It stores and discharges electricity.It stabilizes the voltage　and remove noise.
• Crystals send a clock signal that need to operate micro computers.

I soldered them. It was difficult for me to keep solder shiny and to apply an appropriate amount of solder.I mistook the direction of the diode and the direction of the microcomputer.

Programming

Before Programming, I tried smoke test.I connected my Fabisp to my computer. I did not receive error messages.So I download and install Crosspack AVR.Then I connect my Fabisp to my computer using AVR mark2.And tipped command like below.Then I had a error massage.

$ make clean
$ make hex
$ make fuse
$ make program

I tried to check my solder with electric tester.And I found a short circuit and circuit without solder. I fixed that places.And try again.I succeed!.

I used it to write program embeded programing week and other works.

Version2

I tried to make a circuit by laser cutter.First, I made vector data by illustrator.Then cut.I use Trotec Speedy100 with fiver. Parameters are below.

After cutting, I washed board by alchol.

Then, built a board. It almost same as version1, but this ver use 20MHz resonator instead of a crystal and capacitors.

I feel using laser is easier than using milling.