Tag Archives: led strip

Automatic plant growth lamp

Having some leds lying around lazy, I had to put them to work 😉

This is just a quick side project. We have a lovely hibiscus home which has quite a high sentimental value to us. But sadly it hardly got any flowers. I thought it is time for a little help.

I read some articles which point out that wavelenghts of 630 nm (red) and 460 nm (blue), are very good for the growth of a plant.  70% red, 30% blue would be ideal for getting flowers and a strong plant. This matches almost to the point the wavelenghts of the led strip I got.

Next I wanted to preserve the day-night cycle which a plant needs, which schould remain the real day-night cycle. For that puprose I developed a little light sensing electronic part, which turns the leds on if it is day outside, and back off at night.

Hope we get some flowers soon 🙂

 

Ultrasonic staircase illumination

Just the beginning of another of my projects.

Some time ago I thought about making a staircase illumination using a programmable LED strip, which should only light up near the person going up/down the stairs.

So the last idea was to use an ultrasonic ranging module to find out the persons position on the stairs, which then triggers the corresponding LEDs to light up.

Parts used:

  • Ultrasonic ranging module HC-SR04
  • Arduino
  • WS2812B programmable LED strip

Todo:

  • make some trailing effect for the LEDs to go out smoothly after person passes by
  • put strip in a frame and minimize the electronics
  • replace Arduino with ATMega328