For this part I used the Eagle (Easily Applicable Graphical Layout Editor) program and the following libraries:
You can download this from this link. To load this libraries in Eagle you can type in command line
Creating the Circuit Schematic
Step 01.- Place all the components that you will use in the schematic window (
add command). You have to edit the name (
name command) and the label (
label command) of all the components to avoid mistakes.
Step 02.- Connect all components following the Hello Board design (
net command). You can use
name commandon wires to reduce the quantity of paths, creating virtual connections between the wires with the same name.
Step 04.- Add a LED. I connect to the 5th leg (PB2 port) and with a limit current resistor in serie. To calculate the resistor I used the LED data sheet and the following formule (for only one LED):
|Rmin = (Vs-Vf)/I FC|| Where:
The result is
75-Ohm to 90-Ohm resistor. I use a
100-Ohm resistor to limit the curret.
|Schematic at the end of editing (Download .sch)|
Creating the Board Image
Step 01.-Go to board window (
board command). Start to routing all the paths (
route command), you will need some practice to do it fastly, be sure you are routing in the top layer (red). To erase path use
rip command. Tip: You can use de left click to change the path type.
|Board at the end of routing (download .brd)|
Step 02.-Edit the layers that you want to export like image (
disp command). Select the top layer and the dimentions layer.
Board with Top and Dimentions Layer activated
Step 03.-Export the board(
exp command) and click
. In the window that appear, select the place to save the image or choose Clipboard, set the resolution (300-600dpi is good interval), select Full Area, and then
. After this you can edit in other program the image.
Milling and Welding
For this part I use the concepts and procedure of the Electronic Production Assignment.
The hello Board (Led+Button)