Fab Academy 2012
About Me
My Project
Classes
Electronics Production
PCB Fabrication
FabISP The PCB for the FabISP was manufactured on the Roland Modela. The tracks were cut using a 1/64" end mill, and the outline was cut using a 1/32" end mill; both plans were created using the Fab Modules
The material the board was cut from was FR1, this is copper clad phenolic paper.
Components The components used to propogate the board were all surface mount
Using these components was an interesting experience and here are some tips I would like to share:
1. You need very good eyesight (or some form of magnification)
2. You need very steady hands
3. It really would be handy to have 3 hands
4. Get the ATtiny44 chip orientated correctly (desoldering 8 legged chips is not fun)
5. Getting it wrong again and again is character building
Firmware
I installed the firmware using another FabISP that had already been created and it installed straight away without any difficulties
The workflow for installing the firmware was as follows:
1. Download and unpack the firmware
2. Edit the makefile
-Check device is ATtiny44
-Check speed is 20MHz
-Check the correct avrdude is selected
3. Send the firmware to the ATtiny44 using the following commands from the same folder as the makefile:
-sudo make clean
-sudo make hex
-sudo make fuse
With the firmware installed I then removed the 2 solder joints so that my board would work as an ISP
The final step was to make the IDC ISP cable, this was simple; I used a 6 wire ribbon cable and push down IDC connectors
Case
I wanted to make a case to protect my FabISP and so I drew one up in Solid Works and used my RepRap Mendel to print the case
The polymer I am currently using for my RepRap is Green PLA that glows in the dark
