Instructables

Step 4: Make the LED Array

Start with two LED's and decide which direction you will stitch. Bend the inside lead towards the second LED and solder it then repeat until you have a string of four LED's. Then repeat the entire process five times.

Now bend the leads of one set to the side and attach another set between the two bent leads. Repeat this until you have filled out the entire grid.

Note: Always check the polarity of the LED's you are soldering. This configuration creates five parallel blocks of four LED's in series.
 
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ksikes3 years ago
Do you think its possible to build your own TV?
rocketbat7 years ago
i currently have about 100 ir LEDs i was wondering, since it is in parralell would twenty five rows of four work? (evil laughs!)
Yes but you would need a bigger transistor, and i dont know if a 9v battery can supply this kind of current
geeklord6 years ago
you did a pretty good job soldering those
Wired_24_76 years ago
using a shotgun as a sniper rifle. I like it.
network247 years ago
do u strip da wires after u solder dem or something
what are you talking about
kiwisaft7 years ago
LEDs in parallel is no good - they never get exactly the same current each. one might get some more current, maybe too much -> it'll die, and in chain reaction the others will die, too
aiden1200008 years ago
What would I have to do to use white LEDs, and make a torch type thing out of this array?
If you want to build a torch (i.e., "flashlight" in Americanese), I believe all you need to do is build the 20-LED array out of white-light LEDs, and simply connect it to a 9 volt battery.
You may need to include a resistor if you do that, check the voltage drop across the white LEDs or do a google search for LED Resistor Calculator and you will find some sites that can help you figure out what you need. I connected two superbright LEDs to a 9V battery and it worked well, I did need a small resistor though to prevent overload on the LEDs.
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