Step 2: Prepare the LEDs

Unless if your LED is already a flat-top, you'll have to grind/sand/cut it down to that the top is flat, and not far (within 1mm or 3/16") from the LED glowing element. There's not that much room to shove a whole LED in.

We used a sanding belt to bring it down to size, but see how it leaves the top an opaque white? Here's a trick: Rub the flat face against a sheet of paper for a full minute. It brings up the polish quite well, and if the face is fairly smooth, you can almost get it back to stock clarity.
<p>Would be interesting to see if this could be tweaked to track the power draw of the circuit to see when you are getting close to overloading a power supply.</p>
yah we need those nails to work on small stuff lol
So true!
Ive seen dirtier nails... Im looking at some right now!
A great instructable, will be having a go myself, after polishing the led on the newspaper add a drop of clear nail varnish this should bring it back to original spec, regards Doc Cox
Fun. I like it.
It's a handy indicator when you've left power to a circuit that shouldn't be left on. That, and it's a great way to use a transparent breadboard!<br />
&nbsp;OK but what the need to do something like that???

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