How to Make a Simple LED Tester

do you want to build something but you don't know if your LEDs work?

use this little LED tester to find out!

well,all wou need is:

-some electrical tape
-a button cell battery
-a i/d cable thing with holes in it ( i don't know how it's called)
-an LED for testing...

the materials...:

-some scissors
-a wire cutter/stripper
-a hot glue gun

strip both wires of the cable thing and hold it on the side of the button cell battery,with one wire touching one side and the other wire touching the other side

cut some electrical tape and put it touching both,wire and one side of the battery and same thing on the other side

well,you're pretty much done...

all you have left is to write a + and - on each side of the battery (on the electrical tape),respecting the actual + and -

if wou find that the holes are too loose,you can use some hot glue to fix it

this is very easy...


the LED has two pins:

a long one and a short one

the long one is the positive (+) side and it's called anode

the short one is the negative (-) side and it's called the cathode.it is also the flat edge inside the plastic