Under Stair Lighting

This is the board for the under stair lighting. The Atmega328 is used to read digital pins connected to photo-transistors that are being illuminated by a laser. In the event that the laser is broken the output of the shift registers will be used to trigger the base of the transistors.

Each transistor has a 10 ohm current limiting resistor. the capacitor / resistor  pair that is in parallel  with each transistor is used to provide a fading effect. The value of these can be changed to adjust the amount of time it takes for the LED’s to fade out.

3 thoughts on “Under Stair Lighting

  1. hello … I am very interesting with this project, it is possible for you to share the PDE file (arduino code) or maybe ATMEGA8 and Atmega328 HEX code ?

    Thanks in advance and for the help.

    Kind regards,
    Dedy

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