FAB ACADEMY 2020 - ISHAQ MOHAMMED

WEEK 4 - Electronics Production

INTRODUCTION

For me, I am very happy to finally do SMD soldering, This has been a goal for me for a long time.

Assignment Description

group assignment:

characterize the design rules for your PCB production process
please click here to go to our group assignment

individual assignment:

make an in-circuit programmer by milling and stuffing the PCB, test it.

Let's Start with FABISP

tools and components

Note: This week, we didn't have all the SMD components.

1 x monofab SRM-20 (More about SRM-20 here)
1 x FR1 (Copper PCB Board)
1 x 1/64 inch end mill bit
1 x V bit 30'/.2
1 x double tape
1 x Soldering Station.
soldering wire
AVO multimeter
flux
Magnifying Glass
Electronic Components: ATiny44 microcontroller, USB Connector, crystal 20.000 mhz, pin header.

Now! let's go with PCB fabrication process

Download PCB traces PNG fromhere and outline from here
open fab modules from here
click on input format, then choose image
upload your trace png file

click on output format, then Roland mill (rml)

press on process, then PCB traces (1/64)

On the right side choose your machine brand, for me it was SRM-20

Scroll down, set the cut depth to 0.1, and number of offsets 4(to remove all copper)

Set the initial position to zero

Click on calculate and wait for all tracks to appear

finally press on save

Repeat all steps with the outline file, but choose outline (1/32)

Machining process

I used Roland Vpanel for SRM-20

download the Vpanel from here

Note: you need to install the driver, and the program does not work without communication with the machine

open it

(3)you can move all axes from
(2) to go to your origin
(4) to set your new origin
(7)click on cut to add rml file, then click on output

Fix the PCB on the bed, and install V_bet

set your Zeros
close the door and press on outline
Clean it then get it

Soldering

Programming

there are two ways to program ATtiny44

(1)USING FAB ISP AND WINAVR
(2)Using Arduino
I used Arduino you can download it from here
I followed these two tutorials Arduino as an ISP and FabIsp tutorial.
Go to preferences

Add this link

https://raw.githubusercontent.com/damellis/attiny/ide-1.6.x-boards-manager/package_damellis_attiny_index.json

, then click OK

GO to Tools and Board>> choos Boards Manager

scroldown ATtiny board should be added>> click on install

then go to Examples choose ArduinoISP, then upload it to your Arduino

follow the next instructions:
From borad,Choose Attiny24,44,84 Board
From Processor, choose ATtiny44
From Clock, choose 20MHz, or use internal clock
choose your port
Arduino as ISP, then burn bootloader

Then we need to prepare our operating system (In my case the operating system was Ubuntu)

Open Terminal and type:

sudo apt-get install flex byacc bison gcc libusb-dev avrdude

sudo apt-get install gcc-avr

sudo apt-get install avr-libc

sudo apt-get install libc6-dev

Download and Unzip the Firmware:

Move to the desktop

 cd ~/Desktop

Download the firmware from the Fab Academy Electronics Production page.

wget http://academy.cba.mit.edu/classes/embedded_programming/firmware.zip

Unzip the firmware

unzip firmware.zip

open the Make file with any editor, then edit this line

 AVRDUDE = avrdude -c avrisp2 -P usb -p $(DEVICE) # edit this line for your programmer

 AVRDUDE = avrdude -c stk500v1 -b19200 -P /dev/ttyACM0 -p $(DEVICE)

Note that the /dev/ttyACM0 is my Arduino Port

Open the termnal from FabISP firmware folder and Type
```
make clean
```

after that type
```
make hex
```

then type
```
make fuse
```

Finally type
```
 make program
```

congratulations :)

Now Just remove the Jumper (0 Ohm resistor), and Here You Go!

All files you need