keybrd library is an open source library for creating custom-keyboard firmware.
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- #ifndef LED_H
- #define LED_H
-
- /* LED is an abstract base class
- Each LED object is an IC pin that is used to power an LED on and off.
-
- Connect the LED in series with the resistor:
- Calculate current-limiting-resistor value (100 Ohms to 10k Ohms will work with 5 volts)
- R = (Vs - Vf) / If
- http://www.digikey.com/en/resources/conversion-calculators/conversion-calculator-led-series-resistor
- Connect the LED's anode (the longer lead) to the AVR output pin (+)
- Connect the LED's cathode to ground (-)
- Never connect a LED directly from ground to power. Doing so would destroy the LED.
- */
- class LED
- {
- public:
- virtual void on()=0;
- virtual void off()=0;
- };
- #endif
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