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General info

Code

  • In the RGB LED, 3 small LEDs are combined in the colours red, green and blue.
  • Therefore we have to declare the pins for each colour of the LED.
  • We also declare the pin for the push button and some variables for debouncing the push button
  • The function colourToLed sets the brightness value of each small LED in the RGB LED.
  • In the loop, we debounce the push button and count the detected button presses so that we can perform different actions each time the button is pressed.

Hardware

  • For this project we use an ATtiny25 and two RGB LEDs with a common cathode.
  • We added three 100 Ω resistors (one for each colour) and a 10k Ω resistor for the push button.
  • The keychain is powered by a button cell battery.

Verdrahtung

3D Case

Get the Case: Thingiverse

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