This light helps your plants grow.
I got the idea from the Garduino, but nothing is taken from it. The schematic and the program are mine.
This plant light gives your plants 4 additional hours of light per day. When it gets dark, it turns on and after 4 hours of darkness, the light turns out. The light restarts when it detects light.
Step 1: Parts
You will need:
1x 5V Wall adapter
3x Red LEDs
1x 30ohm resistor
1x 20 ohm resistor
1x 100kohm resistor
1x 50kohm resistor
1x power socket
1x power plug
Step 2: The Pot
I used a plastic container and drilled two holes in the side. The wire goes inside those holes.
You should use some imagination and make one with the materials at hand.
Step 3: Electronics
You can't see it on the schematic, but the + of the adapter goes to Vcc and the - to GND.
The plug helps to make the light more mobile.
Step 4: Software
You should already know, how to upload a program. I've uploaded the .c and .hex files.
In the source, the 14400 (in seconds = 4 hours) tells after how many seconds it automatically turns off. You can change this number if you want.
Step 5: Putting It Together
I hot glued the board to the pot. The brown shielding on the top is to prevent the leds from turning themselves back off. That would lead to continuous blinking.
There's foam in the pot to provide a solid base for your plants. Maybe it's a better idea to use soil.
Step 6: Planting
Add some water into the pot. Try finding a plant, that loves a lot of light and put the seeds inside and leave it to grow.