Led Grow Light for Plants

I’m doing a bigger experiment with plants. It will be a long time project.

So first of all I designed a led module witch is stackable

First, I wanted to buy 2 or 3 Led grow lights, but they were too expensive or not what I needed. So I decided to build my own Led light

I designed my Idea in Sketchup 8 and with DipTrace I made the shematic and the board design.

It’s not the most complicated circuit, but I took the chance to design a PCB.

And here it is. A nice and practical PCB from china.

I added the gerber files, if you want to reproduce the pcb

And here it is. One module has:

• 20 red led's
• 10 blue led's
• 10 resistors 240 Ohm

One module cost me about 5$

As calculated it takes at 12V 200mA and look at the nice pink spot :)

On the last picture you can see how easy you can stack the single led modules

Now the gardening work.

This will be my first attempt to check if my growing light works. I use coir pellets witch provide a lot of substrate and as seed I use salad burnet herb. I took these seeds because of there size.

A small plastic Tupperware will work as a peel for my vegetables. With the addition of water, the pellets swell up. I press the earth over the seeds and put the whole thing under the light. Now I have to wait if it works or not. I also added a thermometer to check if it’s not to cold in my workshop.
Crossing fingers.

After 7 days I had the confirmation that it works