How do I wire up this inverter, with an LED?

[Strydur]

Forward supply voltage: 12.0 typ., 16.0 max.

You cant power a 12v led off of 9v

Tim
The Custom Saber Shop

[yodaphet]

I too am having issues getting this LED to work. I wired it up as the diagram shows, the blade lights up, but the LED is dead. I took it out and played around with it, tried some different resistance, and no change. The only way I was able to get my LED to light was direct to the power suppy, and that resulted in an explosion...[B)]

I have a 5v.30mA.300mcd LED
I am using 18v power supply.
According to the calculator, I should be using a 470k, 1/2 watt, 5% tolerance.

I thought maybe the 470K was too much, so I tried a 220k, and still no light.
Any ideas?

[Strydur]

Are you sure you hooked the LED up correctly? There is a negative and positive side to it.

Tim
The Custom Saber Shop

[yodaphet]

Yes I am pretty sure of it. I even tried reversing it to see, and no change.

Basicaly the longer prong is + and the shorter prong is - right?

I wired it as follows:
Red wire from the inverter I branched off and wired to the resistor, and then to the positive of the LED.

The short prong or negative of the LED I wired with one side of the switch.

Do the resistors have polarity or does it not matter? And it shouldnt matter which switch lead it is connected to right?

[Strydur]

It does matter which switch wire since one side is on all the time and the other is off when the switch is off. Check that the led works by hooking it directly to the battery but put the resistor in-line so you dont blow it. Also if you can take a picture and post it or send it to me so I can see whats up.

Tim
The Custom Saber Shop

[Strydur]

<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">I have a 5v.30mA.300mcd LED
I am using 18v power supply.
According to the calculator, I should be using a 470k, 1/2 watt, 5% tolerance.
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

5v 30mA led with 18v input you need

470 ohm
not
470k ohm

Tim
The Custom Saber Shop

[JaysFreaky]

I was powering the LED with two AAs and that's only 3v.

[Strydur]

Are you sure its a 12v LED then?


Tim
The Custom Saber Shop

[JaysFreaky]

I have no clue. All I see is a forward (supply) voltage with a 12.0 typ next to it. >_>

[yodaphet]

AH 470 and not 470K...That may be my issue then!
I will try it out. If it still doesnt work, I will take pic and send it to see where I am going wrong.
Thanks Tim!