WEEK 6
ELECTRONICS DESIGN
Assignment
- redraw the echo hello-world board, add (at least) a button and LED (with current-limiting resistor) check the design rules, and make it extra credit: simulate its operation
Learning outcomes
- Select and use software for circuit board design
- Demonstrate workflows used in circuit board design
Assignement's files
This week's assignment require to redraw the hello-world board adding at least a led and a button. Bfore to start redesign i had to learn to do it and choos e the my prefered software
I started to evaluate software on assignement page.
- 123D Circuits a Web based circuite design software
- Virtual Breadboard
- Fritzing Interesting because its feature to quote and order the PCB
- DesignSpark
- MultiSIM BLUE Interesting because its board simulation feature
- KiCad EDA Interesting because open source and cross platform
- gEDA Interesting because open source
- Altium
- Circuit Maker Interesting for its community orinted approach
- Pcb Works Interesting for its Solid Works integration
- OrCAD Interesting for its project management feature
- Cadence PCB Design and SI/PI Analysis
- Synopsys Interesting for its End-to-End Prototyping approach
- Mentor
- Open Circuit Design Interesting is under GPL License
- SPICE
Beacuse I'm newbie i had choose the most documented one EAGLE, i started to learn it on Youtube
The first step is to download it
Once dowloaded I installed it choosing "Run as Freeware"
At first start I got this window , click on file -> new -> project
Right click on project new -> Schematic
To add component first I need to download the Library from assignement page and copy it to the EAGLE installation path
then click on Library -> use to choose the library to use
then I started to add componet by the "ADD" button
I added these componentand wired them togheter
- 1 Capacitor 1Uf
- 2 Resistors 499
- 2 Resistors 10k
- 2 Jumper connectors
- 1 Microcontroller (attiny44)
- 1 Resonator 20MHZ
- 1 Button
- 2 Led
Why I chose to put 2 leds
given that the original design has left 4 free ports I tried to insert two LEDs instead of just one as required by the assignemnt
so I attatched LED1 to the PA7 and the LED2 to the PB2
To generate the board I clicked on this button
Eagle ask me to create the board from the schematic
So my headache started :-)
After a couple of day moving and wiring components arount I got the board
Leaving visible only the top layer I'm ready to print it out!
This is the taces file
This is the interior file obtained by editing the traces file with GIMP
I set up th emilling machine as described in lesson 4
That's the board i got
This time soldering was easier due the experience gained
