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,

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>