Step 3: How does the Circuit work :

When the door of the wardrobe is closed, the door presses against the SPDT Switch. The SPDT Switch causes the circuit to be open, hence no current flows and the LED Light is tuned off.

When the wardrobe door is opened, the SPDT Switch is released, as a result the circuit is closed. Since now the circuit is closed, current flows to the LED Light and it is turned on.

The given diagrams will help in visualizing the explaination. 

Why do you use a single pole, <strong><em>Double</em> </strong>throw switch? Wouldn't a single pole, <em>normally closed</em> switch suffice? Don't mean any disrespect, just curious. Thanks.
How did you &quot;harness&quot; all the fibers into a bundle and attach the led to the end? How did you attach it so that it stays in place and there is no light leakage with all the led's light being focused into the bundle?
P.S.- My above question was referring to the last image you posted with all the fibers hanging down (one of the &quot;Optional Modifications&quot;). I knew you would know to what I was referring, but posted this for anyone else who might not have known what I was talking about. Thanks!
hey may i know wat work is this LM315 doing out here..???
The LM317 is used to regulate the amount of current going to the High Power LED. Without the above circuit, if the High Power LED is directly connected to the battery, it will burn out very soon.<br>
Ohms law says R (resistance) = V (volts) / I (Amps)<br> <br> Therefore:<br> Given a 9 Volt battery,<br> a LED FV of 3.5, and<br> a LED DC Forward Curent of 0.35 Amps<br> <a href="https://www.jameco.com/Jameco/Products/ProdDS/2006895.pdf" rel="nofollow">See</a><br> <br> R = V/I = (9V-3.5V)/0.350A = 5.5V/0.350A = 15.7 Ohms<br> <br> And Joules Law:<br> Power (Watts) = Volts * Amps<br> P = V * I = 3.5 Volts * 0.350 A = 1.225 W<br> which the data sheet allows as it says the 1 W LED actually can source 1.4 Watts.<br> <br> So I do not think you need the LM317 either.
That's right, but why risk your expensive high power LED when you can protect it with a few cheap components.
Whats less expensive; a single resistor or a resistor and a voltage regulator?<br><br>JVG&gt;&quot;to regulate the amount of current&quot;<br><br>The very definition of a resistor.<br><br>It really doesn't matter. Build your circuit with whatever components make you comfortable...I just was suggesting an alternative but you are welcome to ignore me.<br><br>Nice job overall, I hope you post more.<br><br>Regards,<br>Rod
Your comment, which included &quot;you are welcome to ignore me&quot;, was very unnecessary. Just simply uncalled for. I think this person did a very good job and you had to be a jerk. Maybe you could have presented what you had to offer in a more dignified, more respectful way.
Please forgive my ignorance, I thought I read all the steps but I don't see what you made the strands of, it's a wonderful project and I love the effect. <br> <br>For builders in the U.S. LED supply has all the parts you need including a buc puc which regulates the voltage automatically.
Peoples asking about the price and all i will put some light on it<br><br>There are many stores in Lamington Road the more quantity less is the price<br>1wat high luminescence led the one shown above costs rs.25 each (i still think am fooled here)<br>the alien pad i.e. heat sink on which Led's are attached are rs.5 each<br><br>the other leds not high intensity one<br>cost around rs.2 each if purchased in lot ten 1.50<br>if more amount like 500 or 1000 ten 1rs max<br><br>the heat sinks which is used in other prjs for LEDs are rs.5 each<br><br>TIP 41 transistor - rs 15 each<br>3.5 mm jack rs - 15 each<br><br>enjoy<br>nw peoples asking abt shops in other states sry no IDEA :)<br><br>
wow wow i was searching where i can get High power Leds and here you enlightened me. thanks man........GREAT HELP<br><br>anyways last thing i wud like to ask i will be designing aquarium light from this and i want that led's will b turned ON continuously what to do in such cases <br><br>how to save them from frying and what resistors to use<br><br>what i will be doing is connecting 5 LEDs in parallel so 2rows<br>i.e. 10 LEDs per row and using mobile charger as source then what can b done in such case resistor values what i cant count<br><br>Charger Details : nokia : o/p -&gt; dc5.0v -- 500mA<br><br>Can u please help me with it
Indian too.<br>Where did you get those 1 Watt LEDs ?<br>Price.<br>Mumbai
You can get the LEDs from Lamington Road, Mumbai. There are many electronic components shops there.
Can any1 tell me in which applaince can we get LM317 if u noe then please tell me.
The LM317 is a cheap IC regulator available for only 10 INR. So I do not think you need to rip apart any device. Btw it is found in small home appliances with electronic controls, portable radios, car electronics.
Amazing JOB keep it UP ....... May U always Succeed in whatever u do ...... Bless You
Thank you heavensguy.
Cool idea, I will surely try it out.
Good job, Vinet.<br>Where did you get the high powdered LED.
them LED's really need a heatsink tho, they get very very hot even on only 5 volts
Normally the wardrobe is opened only for a short while besides I have already mentioned in the instructable, that the assembled circuit casing acts as a heatsink.

About This Instructable