Difference between revisions of "Matrixpad"
Brainsmoke (talk | contribs) (→Photos) |
Brainsmoke (talk | contribs) (→Photos) |
||
Line 69: | Line 69: | ||
<gallery heights=240px widths=320px> | <gallery heights=240px widths=320px> | ||
+ | File:Matrixpad.jpg | ||
File:Shinies.jpg | File:Shinies.jpg | ||
</gallery> | </gallery> |
Revision as of 22:12, 1 December 2013
Projects | |
---|---|
Participants | Brainsmoke |
Skills | PCB Design, Electronics, Hardware debugging |
Status | Active |
Niche | Electronics |
Purpose | Infrastructure |
Contents
Capacitive Touch Matrix Numpad For an Atmega328p
BOM
Item | Quantity |
---|---|
PCB | 1 |
ATMEGA328P-AU | 1 |
10KΩ 0603 SMD resistor | 1 |
4.7KΩ 0603 SMD resistor | 7 |
470KΩ 0603 SMD resistor | 3 |
1μF 0603 SMD capacitor | 1 |
100nF 0603 SMD capacitor | 1 |
4.7nF 0603 SMD capacitor | 3 |
4 pin header .1" | 1 |
3x2 pin header .1" (for ISP programming) | 1 |
Github repository
https://github.com/techinc/matrixpad
Technical Background
- Excellent technical description:
http://sensi.org/~svo/capsensor/index.en.html
- QMatrix Whitepaper:
http://www.atmel.com/dyn/resources/prod_documents/qmatrix_white_paper_100.pdf
PCB Design guidelines
- Moisture Tolerant QTouch Design:
http://www.atmel.com/images/doc42017.pdf
- QTouch Schematic and Layout Checklist:
http://www.atmel.com/Images/Atmel-42094-QTouch-Schematic-and-Layout-Checklist_Application-Note_AT02259.pdf