This is a very simple but useful LED tester that lets you test, compare and check the colour of just about any two pin LED.

To make it you will need the following:-

A PP3 battery connector.
A 470 ohm resistor.
A bit of heat-shrink sleeving to cover the resistor.
A two pin Molex style 0.1" (2.54mm) pitch miniature socket.
Two contacts for the socket.
A PP3 9V battery. Alkaline preferred.

And some LEDs to play with.

Step 1: The battery connector.

The main part of this instructable is a cheap and common PP3 battery connector used to connect to the small rectangular 9V batteries.
<p>Simple, direct and easy to build. A suggestion and a question. </p><p>Using a 9V Battery holder, and gluing the molex to the plastic battery holder would make a more compact tester, no? I believe that there are holders(sockets) made for LEDs that you could use as well (Smaller, easier to solder to) but (on dialup) I can't locate them on the web just know.</p><p>Do you know if there are LEDs 'out there' that might be damaged by the 9V power source? I assume you added the resistor to prevent this. I ask because I have salvaged LEDs from various boards and have no idea of the specs for them and was looking for a test device that would serve without possibility of burning up the subject LED.</p>
<p>OR, why use a socket/holder at all!</p> <br> Multimeter Probes - Tweezers<p> <br> TOL-11060 <br> <br> </p><p> <br> <strong>Description:</strong> Testing surface-mount components with <br>standard test leads is anything but easy. Everyone has their own method: <br> some people tackle it with teamwork and have a friend (or grad student) <br> hold the probes, some people have adapted a sort of chopsticks-like <br>technique, but the best way by far is probably just to buy these handy <br>tweezer probes! Tweezer probes connect to your existing instrumentation <br>with shrouded banana connectors and allow you to easily test small parts <br> with one hand. The large plastic tweezers are easy to grip and are <br>marked for polarity.</p><p> <br> <strong>Dimensions:</strong> Tweezers are 6&quot; long with 10mm open clip distance. Wire lead is 16&quot; from tweezers to jacks.</p><p>https://www.sparkfun.com/products/11060</p>
Really easy, and super useful.
Nice job dude.****
Simple and elegant. I like this. :-)

About This Instructable


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Bio: Self employed industrial electrician who likes taking stuff to bits and modifying it, or building completely new stuff. There's nothing nicer than a completely ... More »
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