Equipment
_Roland Modela MDX-20
_Metal bench shear
_Soldering iron 20W 220V
_Soldering station
_Heat gun
_Magnifying glass
_Desoldering pump
_Tweezers
_AVRISP mkII programmer
_Mini USB cable
Materials
_Copper plate
_Solder wire
_Solder paste
Components
_Microcontroller Attiny 44A
_Resistor 100Ω [1000] (x2)
_Resistor 499Ω [4990]
_Resistor 1KΩ [1001]
_Resistor 10KΩ [1002]
_Jumper Resistor 0Ω [0] (x2)
_Capacitor 1µF
_Diode Zener 3.3V (x2)
_Ceramic Resonator 20MHz
_Mini USB connector
_Header 3x2
*Click to see the components
1_PERSONALIZATION: Download + Photoshop
I decided to fabricate the resonator model. The trace was download from here and I personalized it with a ‘Pixel Cat’ image using Photoshop.
2_MILLING: Fab Modules + Roland Modela
The next step was uploading the file to the Fab Modules and send it to the milling machine. After doing some tests with the help of the tutors, the most suitable parameters were:
3_CUTTING: Heat gun + Metal bench shear
In order to cut the board, I heated the copper plate with the heat gun for a few minutes; when it seemed to be bendable, I cut it with the metal bench shear.
4_SOLDERING: Components + Soldering iron
Before soldering, I collected the components I needed and I used a board that was in the laboratory as an example. At this stage, the magnifying glass and the tweezers were necessary since the components are tiny.
This was my first time welding; therefore, before welding mi own FabISP board, I practiced with other two boards that were already spoiled. I realized that it is necessary to have a lot of patience and that the solder paste and the cleaning sponge are certainly very helpful in this process.
5_PROGRAMMING: FabISP + AVRISP mkII
The AVRISP mkII programmer was connected to the header of the FabISP board using the ribbon cable; and the FabISP Mini USB connector was plugged to the USB port on the computer using a Mini USB cable. The AVRISP mkII LED light turned on green.
Then I ran the following commands in the FabISP firmware:
6_DESOLDERING: Soldering iron + Desoldering pump
Finally, I used the desoldering pump in order to remove the jumpers. Now the programmer is ready to use.
