assignment4

electronics production

make an in-circuit programmer by milling and stuffing the PCB, test it, then optionally try otherPCB processes.

Roland MODELA machine. Here we mill the copper plates to obtain our PCBs

First we test some settings in order to see the correct parameters for milling our PCBs, like diameter, offsets, X, Y and Z settings mainly.

Here we can see the path that the milling drill is going to do

The most complicate setting is the Z axys because it can barely scratch the surface or if you go to deep the copper could felt off in the welding process.

More testing, we use the 1/64" endmill point

In this window we can see the path of the milling drill but here´s something wrong because the drill just scratch the surface of the plate.

Here we can see the path that the endmill is going to take

more testing settings

Almost there.....

Here are more detail PCBs

Finally we came with the right settings

Right path

This was the last testing PCB that I done in order to start processing my PCBs

The MODULA working

Some ATtiny 44 PCBs

I´m going to start with this two plates.

welding

Preparing everything to start welding the components.

and the link to the group assignment is: FabLabCDMX.

Before start, I test that the electric current is ok in the GND and in the VCC trace

I use this Weller Brand soldering iron

First I practice to apply some tin on the traces

More practice

Finally I think I´m ready to start welding my final PCB

Here´s an image of the Board and the Components that I select in the link of our Assigment that is a Model:

ATiny 44A / IC MCU 8BIT 4KB FLASH 14SOIC

This is my list of components according to both images.

preparing the workspace

First I will start with the IC

Here you can see the tiny IC component. There´s is a very little mark in the surface of the IC that indicates the position of the IC in the PCB that in this case is a circle.

I was going well but I put more tin than I need and I join two "legs" of the IC

I desolder the excess of tin using a vacuum tool that proves to be very useful

Then I solder the Resistors, the diodes, capacitor and one set of jumpers and then i will solder the J2 USB

A wider image of the workspace with the last components

Almost done

Looks like a Star Wars miniature

Another view of my ATtiny 44A

My HERO shot of the PCB

The .PNG image of my SWD board.

Importing the .PNG image to configure MODS to start milling my board

I download the original code from the page of Adrián..... and then I change some lines to adapt it to my needs

A detail view of the "calculate" window in MODS

My SWD board just before milling the outline

Here with all thestuff and components need it to weld my SWD board

A closer look to my SWD board

Connecting two SWD to bring to "live" mine so I can program my HUGODINO

Everything good, Verification done, it´s ready to program.

Hero shot of my SWD with both leds ON

The green spot

a place to re-connect

ELECTRONICS PRODUCTION