04. Electronics Production

Cut the Fab ISP by using the mill machine

Preparation: download the Board Files and Mill the Board

        

        Download the traces
        

        

        Download the outline
        Then you will get:
        

        

        

        Go to the webiste:Fab Modules
        choose the selection that fit with your machine:
        

        Mill using the fab modules and a 1/64" bit!
        

        Mill using the fab modules and a 1/32" bit!
        choose your machine and set the zxy to 0 and push the "calculate"
        

        If it finishes the calculation correctly, you will get:
        

        And you need to save the profile to your computer:
        

        For the traces, you will get:
        

        

        For the outline, you will get:
sent the profile to the software that control your machine - the machine in my fablab is SRM-20 
        1. Disassemblage original endmill
        

        2. Assemblage the one that used to mill the traces file
        

        3. use the software to move the endmill into proper situation and control the z coordinate
           to make it close to the surface of the PCB board
        4. Disassemblage endmill and make it close enough to the surface of the PCB board and make it compact again.
        

        5. start milling by clicking it on the software.
        

        

        You can see the computer will control the cutting to move automatically:
        

        

        

        6. finish cutting the traces and clean it:
        

        I use this to clean the board:
        

        

        Same in cutting the outline but you need to assemblage another endmill
        (Which might cut harder and not that easy to be destroyed wile cutting)
        

        

        

        Finish:

Prepare the material that you will need to solder

        

        the materials that you need:
        

        

        It is quiet a hard time finding materials that I need 
        (It took me 2 hours to prepare all the material that I need)

Get ready of all the materials and start soldering

        The devices that you need :
        

        clean it
        

        Now start soldering but be careful for the direction of some part
        

        After you finish you will get:
        

        then :
        

        

        If there is something wrong with soldering
        Just clean it and redo it
        

        Then use a programmer which has already been programmed before to program it 
        (If you fail, 1. something wrong with the original programmer2.your in-circuit programmer may also have some error)
        I failed quiet a lot of times, at last I found that I reverse the IC1t44 - and 
        when I linked it with another programmer , smokes came out - Ops.

Prepare the software for programming

        
For MacOS

        
Download and install the tools

        01. Download and Install Crosspack AVR for MAC
        02. Download XCode in appstore
        03. Download the firmware for MAC
        save the firemware to your desktop and unzip it
        

        
Then Edit the Makefile - You need to install Crosspack AVR for MAC first!

        Open the terminal and type:
        cd Desktop/fabISP_mac.0.8.2_firmware
        make clean
        make hex
        And you will get:
        

        

        Now you need to connect your devices into your computer
        Next, set the fuses so your board will use the external clock (crystal)
        type:
        make fuse
        And you will get:
        

        Thenprogram the board to be an ISP.
        type:
        make program
        You will get:
        

        Well done!
        Now follow this instruction:
        

        
You shouldn't remove the 0 Ohm resistance!

        And make a in-circuit programmer successfully -
        you can use it to make another in-circuit programmer.
If finish the following tutorial; you can link the programmer to the computer to check whether it will work.:

Important issue - the 0 Ohm resistance can't be remove!

        I have tried so many times and found that if the 0 Ohm resistance been remove, 
        the time you use it to make fuse/make program to other programmer, 
        it must fail!
        
And if you don't remove the 0 Ohm resistance

        Everything will be OK!
        

        I ask this this with sending the global email ( I wrongly thought it may be a big mistake written in the tutorial )
        Then I got the reply of this problem from Eduardo Chamorro Martin, Fablab Seoul:
        
Removing that 0 resistor allows you to program other
 boards with voltage other than the 5v coming from the USB.
(if you remove that resistor,you are not
 powering the "target" board) that means you have to power the
 "target" board with his own power supply.


If you only want to use it to program 5v targets, you can keep
 it and power the "target" with the same flat ribbon cable.


Sorry about that 
the email that 
bother everyone 
I wrongly thought it might be a huge problem.

Here shows that it works!