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Primitive Arduino-based capacitive touch sensor
- Published_at:2013-02-05
- Category:Science & Technology
- Channel:idogendel
- tags:
- description: On each measurement cycle, the Arduino begins by discharging the foil plate (by connecting it to a LOW output pin). Then, it charges the plate slowly through a 10M ohm resistor and measures the time it takes until the charge is registered on an input pin. The presence of a human hand at close proximity creates a dynamic capacitor, which draws in the charge until full; so the closer the hand, the bigger the capacitor and the longer it takes to charge. The software then translates the time to LED brightness.
| ranked in date | views | likes | Comments | ranked in country (#position) |
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| 2013-02-07 | 3,764 | 3 | 2 |
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