Week6 - Electronics Design
Redraw the echo hello-world board, add (at least) a button and LED (with current-limiting resistor).
CLASS WEB PAGE: http://academy.cba.mit.edu/classes/electronics_design/index.html br>
REFERENCES:
EAGLE SOFTWARE
EAGLE INTRODUCTION
FAB ACADEMY EAGLE TUTORIAL
To make the board I use Eagle freeware version to redesign the hello board. I downloaded it from PROVIDENCE TUTORIAL. All components that I need are in the Eagle Library to add to the Eagle basic one.
I started studying basic tutorials of Eagle following mainly the process as the video and reading the Data Sheet of each component that interested me. After loading the library and opening the Hello World board I started to re-design the bord.
The interface of the software is quite simple. We are adding a lot of nice components like a button that will controll the connection of the LED with the VCC. I placed all the extra-components over the schematics and I assigned each net-structure to the pins of the microcontroller, to the GNR and to the VCC.
To do the board the next step is again use the Roland Modela in order to mill the board. So first thing to do is export from Eagle PNG the image of the circuit chosing monochrome with a resolution of minimum 600px. Then in photoshop generate the two files for the traces and interior.
With the Roland machine I repeat a procedere already known : the tool 1/64 for traces and 1/32 for interior.
Once all is ready start to put the components. Once the components are there check the connection with a multimeter and ready to play with the ISP to run the bootloader.
COMPONENTS USED:
- 2 Resistor 10 K
- 1 Red Led 1.8 V
- 1 Resistor 180 Ohm
- Attiny 44 microcontroller
- 1 Capacitor Uf
- 1 Cer Resonator 20 MHz
- Black Button Tactile Switch
- Isp
- FTDI
A SHORT VIDEO OF MILLING PROCESS:
Milling Hello-Board
Machine References:
http://www.rolanddga.com/products/3d/srm20/
NOTE:
As a beginner in electronics, I had some difficulty understanding all electronics components and the relation with eachother but our specialists in Frosinone Fab Lab explained us features and operations about all of it and now I have a basic knowledge at least about this HELLOboard. Also I had problems with the soldering of small components but after making FabISP in the 4th week assignment and HELLOboard this time, I did a litle more practice.