I've made a new instructable which can be found here.
The instructable covers how to make a grow light for indoor plants. I made the light because I planted some tomatoes a few months ago, and at this time of the year there's only about three-four hours of sun in Norway.
It was a lot of soldering, but what I liked the most about the project was the 3D modeling of the light holder which sits on top of the green house.
Introduction at instructable:
In this instructable I'll show you how to make your own grow light for indoor gardening!
The light was inspired by what NASA uses to grow lettuce aboard the ISS.
This light is perfect for indoor gardening to make sure your plants get enough light for photosynthesis.
It is made with alternating red and blue LEDs because these are the wavelengths plants use the most. That's actually why plants look green. They absorb all the light in the red and blue spectrum, and reflect the green wavelengths away.
The light is built in modules which makes it easily expandable to any size you need.
This project requires a lot of soldering so it's a perfect project for learning or honing your skills!
If you like this project hit the vote button up in the right corner!
If you want to get fancy with this light add a timer so your light turns on and off automatically!