The goal of this assignment is learn how to use the milling machine, how to weld the different components and how to programm the FabISP.
Shown how you made and programmed the board
Explained any problems and how you fixed them
Included a 'hero shot' of your board
Here you can choose:
The machine: SRM-20
x0, y0,z0: 0 (is the origin of the tool)
xhome, yhome, zhome: 0, 0, 5 (is where the tool will go went it finishes)
Process (all of them will be appear by deafult when you choose the tool):
Calculate button: You can watch the way of the tool it will do (like in the image)
Save button: To save the document for the machine
Number of offsets: You can change it, is the distance between the traces and the rest of the cooper
Move the tool of the machine with the 'x' and 'y' arrows, and place it on the origin and click the X/Y button on the right (to set the origin point).
To give the Z origin to the machine, you will open the machine and leave the tool touching the board. Now you can press the Z button on the right (to set the origin point).
To do the interior file, do not forget to change the tool, 1/32. To change it, you do not have to change the X/Y origin, change the tool and as before, to find the origin Z, leave the tool touch the board and fix it. Now press the Z button on the right (to set the origin point).
Wire of tin
Sponge (to clean the soldering iron)
AND A LOT OF PATTIENCE!!
|IC MCU AVR 4K FLASH 20MHZ 14SOIC||ATTINY44A-SSU-ND||1||IC1|
|Bergstik Headers 2X3P UNSHRD HDR 30||649-95278-101A06LF||1||J1|
|CRYSTAL 20.000000MHZ 8PF SMD||644-1039-1-ND||1||20 MHz|
|DIODE ZENER 3.3V 500MW SOD-123||BZT52C3V3-FDICT-ND||2||D1 D2|
|CAP CER 10PF 50V 5% NPO 1206||311-1150-1-ND||2||C2 C3|
|CAP CER 1UF 50V 10% X7R 1206||445-1423-1-ND||1||C1|
|RES 499 OHM 1/4W 1% 1206 SMD||311-499FRCT-ND||1||R2|
|RES 100 OHM 1/4W 1% 1206 SMD||311-100FRCT-ND||2||R3 R4|
|RES 1.00K OHM 1/4W 1% 1206 SMD||311-1.00FRCT-ND||1||R1|
|RES 10.0K OHM 1/4W 1% 1206 SMD||311-10.0FRCT-ND||1||R5|
|RES 0.0 OHM 1/4W 1206 SMD||311-0.0ERCT-ND||2||SJ1 SJ2|
|CONN RECEPT MINI USB2.0 5POS||H2961CT-ND||1||J2 USB|
You can also test the value of the resistors and if the Zener are in the correct position. For both of them remember to change the selection, fot he Zener you have to chose the tension [V] and for the resitors the resistence [OHM]. Be careful, there are different ranks.
5.1. make clean
5.2. make hex
6.1. make fuse
7.1. make program
To use the FabISP as a programmer I taken out the two bridges (resistors of 0 ohms).