Week 7

Electronic Design Week

This week is electronic designing week.Prof.Neil gives overall introduction about basic electronics and design Assignment in this week is redraw of hello world board and add a push button and LED to the hello-world board.Use this board in the lab to understand how to programme the board.Actually I have some experiences with boards like Arduino,Raspberry pi etc.We need to redraw the Echo Board and also need to add a button and led.This Board is powerd by An Atmel ATtiny44.

For doing this assignment I installed EAGLE and learn the designing of board with the help of EAGLE.Then I downloard components from fab academy website and draw a schematic using the EAGLE software.First of all i need to add the library of the componets , in here we have a git repo that include almost all the library that used in fablab.

Steps for designing the pcb

1.First open the schematic.
boards fab lab santiago

2.Add the component which you need.
boards fab lab santiago

3.Adding components.
boards fab lab santiago

4.Wiring components.
boards fab lab santiago

Then I started to design the full board.

Before desingning the full board I refered this picture.


boards fab lab santiago

The design of the schimatic.


boards fab lab santiago

Before routing the board make some changes in design rules.
boards fab lab santiago

boards fab lab santiago

boards fab lab santiago

boards fab lab santiago

Then I exported the layers to a pen drive.
boards fab lab santiago

As usual I started to mill the PCB.After that I soldered all the componetns.

components I used are

  • ATtiny44 (1)
  • Resistor 499ohm (1)
  • XTAL 20HZ (1)
  • Resistor 10K (2)
  • Capacitor 10uf (1)
  • Push button (1)
  • ISP header (1)
  • FTDI header (1)
  • LED (1)

There was a problem on the board.The problem was that a trace had been broken so I soldered a wire into it.

the programme

boards fab lab santiago

soldering the board

boards fab lab santiago
boards fab lab santiago

this is the result


boards fab lab santiago