Electronic Design
Redraw the echo hello-world board
All the studen should redesign the HELLO WORL BOARD by adding at least a button and an LED (with theirs respective side components)Check the design rules and fabricate it.
Looking for an example of the HELLO WORLD BOARD that it is composed of a ATTINY44, 6PIN ISP CONNECTOR, FTDI CONNECTOR,1 resitor smd, 1 capacitor smd
and one resonator 20MHZ.They have to redesign the board adding an Led and a button. As most of the students already know a led comes always acompanied with a resitor to limit the currect flow trought the led.To know wicht one the have to use just google"led resitor calculator" and by looking and settings the datasheet values of your led you will be able to know wicht one to use.
The button also need a resistor.When the pushbutton is open (unpressed) there is no connection between the two legs of the pushbutton, so the pin is connected to ground (through the pull-down resistor) and we read a LOW.
For most of the students the choice is obvius,EAGLE as design tool. Why? it is free for small boards and comes with a lot of easy/powerfull libraries.
ORIGINAL / MODIFIED
Design tools : EAGLE
After designing the board they have to produce the pcb. They will use the mini cnc in this case ROLAND SRM20 as two week ago.
These are the two files that the students are using as guide for their assignement? Why don't you also try!
