Week06: 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
extra credit: measure its operation

Prepare Eagle Library

I decided to use Eagle as electronic design software.
Download fab.lbr and place it into FabAcademy2017 folder under lbr folder.

In Eagle's Control Panel, select Options -> Directories...

Open Directories window and add "/FabAcademy2017" after Libraries path.

Then, fab.lbr appeared under Libraries.

Start New Project

Make New project, File -> New -> Project, then name "echo hello-world".

Right click on echo hello-world, then New -> Schematic to make new Schematic.

Parts


R1:	Resistance	10k [ohm](1002)	x 1
C1:	Capacitor	1u [F]	x 1
IC1:	Attiny 44		x 1
20MHz:	Resonator	20M[Hz]	x 1
J1 ISP:	Pin header	2x3	x 1
J2 FTDI:	Pin header	1X6	x 1
ADD	Tactile Switch		x 1
ADD	LED		x 1
ADD	Resistance	1k [ohm](1000)	x 1
ADD	Resistance	10k [ohm](1002)	x 1

Schematic

Place parts in the parts list from fab.lbr to Schematic.
Then, use command net, name and label to make line relations to connect.
I also use HelloKamakura.lbr, that was provided by FabLab Kamakura.

download .sch

Command
net

name

label

group

move(Move:Group)

erc(electric rule check)

Board

To change Schematic to Board, use "Generate/switch to board".

Place parts referring to images below and add LED, button and registers.

download .brd

Command
move
When open Board window, all parts were on the left of white-lined area, move all parts into white-lined area.
Adjust white rectangular to small enough, that will be the area of png image when Export.

ripup;
To use this command, make yellow connection lines simpler. This helps to do manual route.