Difference between revisions of "Matrixpad"
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== Capacitive Touch Matrix Numpad For an Atmega328p == | == Capacitive Touch Matrix Numpad For an Atmega328p == | ||
| + | |||
| + | == BOM == | ||
| + | |||
| + | {| class="wikitable" | ||
| + | |- | ||
| + | ! scope="col"| Item | ||
| + | ! scope="col"| Quantity | ||
| + | |- | ||
| + | | PCB | ||
| + | | 1 | ||
| + | |- | ||
| + | | ATMEGA386P-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 == | == Github repository == | ||
Revision as of 21:47, 25 November 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 |
| ATMEGA386P-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://svo.2.staticpublic.s3-website-us-east-1.amazonaws.com/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
