I found jar of sweet candy sold here at KSA that looks good for a Betta tank. Power supply via the USB LED lamp feature originally came from (artificial intelligence).
It's USB powered, as this Instructable would look great on an office table, and you could always be with your precious Betta (or other fish) at work.
Step 1: cleaning up and collecting materials
Cleaning:
1. Eat the chocolates / candies.
2. Put your glass in a bucket of water until the label is soft for you to remove without scratching the glass.
3. Dry with a soft cloth.
Materials:
(1) Soldering iron and lead
2. electric drill with 5mm
3. 7 LEDs
4. 7 resistors - 68 ohms
(5) connection cable (fixed)
6.Switch (optional)
7.USB cable (from a broken mouse)
8. 2 CD slim cases
9. Tape
10.Rubber-based (don't know what it exactly means, but those are the rubber footnotes of small plants. I got mine from a network hub)
11.Jar of natural candy (any type is fine, just use your creativity)
12. super glue
Step 2: rubber base
Glue the rubber-based shell and under the glass. This will prevent slipping and make it stable.
Step 3: assembly tape / double-sided tape
Stick about an inch of assembly tape inside the CD case, but don't just peel it off the other end. This would keep the two sides locked in place and protect your circuit later.
Then you stick some duct tape the same length on the outside so that you could install the CD cases on the roof of your vessel.
Step 4: installing LEDs on the slim CD cases
Select the location for the LEDs.
Use the drill press and do some holes on your preferred location.
Place your LEDs. Use super glue to secure them in place if they are a bit loose.
Note the lines (anode and cathode). The anode (+) is longer than the cathode (-).
Step 5: the circuit
(Sorry, it's dirty work. "I'm just thrilled to be finishing this project early.)
We'll do the stretch in a parallel link.
Solder a resistor to each LED anode (+). Then run up and solder the wire connector to all of the resistors so that all of those ends are connected together.
Running and soldering another connector wire to the cathode (-) ends of the LEDs the same way as the anode.
You can find them in the picture below (2nd picture).
For a more detailed approach, see the original instructable (artificial intelligence).
Chip out a small opening so that the two ends of the hook wire (+ and -) can go outside (see comment 3. pic).
After completing the circuit, close the CD case (3rd picture). Check that the whole circuit fits snugly while the CD case is closed. If all is well, open the CD case again and peel off the remaining side of the adhesive tape (inside) and close the CD case again. This will surely protect your circuit.
Step 6: testing
Test the circuit to see if it works (see figure / 1st picture) ...
1. Remove the end of the USB cable.
2. Cut the green and white wire off and save the black (-) and red (+) wire.
(3) out of the circuit temporarily connect the red (+) wire to the line where the LED anode runs (the line where the resistor runs).
(4) temporarily connect the black (-) wire where the cathode runs.
5. Turn on the computer.
(6) Plug in the USB and see the circuit works (2nd and 3rd picture). If it doesn't, check the connections.
Installation of the circuit on the candy jar (unfortunately no pictures) ...
1. Disconnect the USB cable from your circuit.
(2) Peel off the remaining side of the assembly tapes that are on the outside of the CD case. Glue it to the glass cover.
Step 7: assembling the switch (optional)
(This is only optional, but looks great on me.)
I drilled a hole in the lid and installed a toggle switch, then finally locked the ciruit. Find the figure below.
And I drilled some little air holes on the back of the lid by the way.
The toggle switch has two terminals. Solder both ends of the wire to these terminals positive. See the 3rd picture for your reference.
Step 8: final test
1. Reattach the cover / cover.
(2) from a powered on computer, connect the USB cable. Test the switch to see if it works.
Step 9: add fish and enjoy!
Do as you wish. I have 3 Rose Barb (Tetras) and 1 Albino Cory like fish to test. I'll have my Betta soon when I return to the Philippines and don't worry about how long do betta fish live.
https://www.youtube.com/watch?v=_aMYF8PUjHY
I have placed some crushed coral and fake plants. You are allowed to use live plants, but I'm not so sure if it will thrive on these LEDs. Aged water, then the fish.
Step 10: after dark
This is how it looks in the dark.
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