leds help please

[kbowen]

Help please I can't remember which side of the led is positive .

Thanks

[KeithTarpley]

Greetings,,,

The long leg is typically positive.  The short leg, with perhaps a flat spot on the led, negative.

Keith

[kbowen]

Thanks Keith , my first build, a little nervous here.

[KeithTarpley]

Greetings,,,

Thousands of units built and working.  You'll add at least one more soon.

Keith

[CaptKirk]

I use this when I get confused:

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A Google search for "led polarity" brings up a wealth of info.

One thing to keep in mind is that the picture of the LED insides does not always apply ro all the LEDs out there as I have had issues with some LEDS from Mouser (I cut the leads before inserting and then followed that diagram but had to reverse it to get it to work)

Hope it helps.

[JoeFromOzarks]

Here's a little diagram I made for my friends daughter.  I added diylightanimation.com and now it belongs to the entire community!

joe

[chrisatpsu]

remember, positive is usually bigger than negative...  so the positive lead is bigger (longer) than the negative

: )

[bisquit476]

I use a watch battery, they are thin and the legs will slip right over them, just watch the voltage when buying the battery.

[dmaccole]

I use a watch battery, they are thin and the legs will slip right over them, just watch the voltage when buying the battery.

Yes, a 2032 works great. There's always one on my desk.

But they're expensive  ... unless you buy them as a tea candle ...

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\dmc

[kbowen]

Thanks everyone, got it built . Now just having issues testing dongle.

[trekster]

I use a watch battery, they are thin and the legs will slip right over them, just watch the voltage when buying the battery.

Yes, a 2032 works great. There's always one on my desk.

But they're expensive  ... unless you buy them as a tea candle ...

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\dmc

Or from Ebay for $2.55 for 5 with free shipping.  That is 51 cents each. You are not allowed to view links. Register or Login

Ron

[dmaccole]

Or from Ebay for $2.55 for 5 with free shipping.

Yes, Ron is right ... I always go to eBay for batteries when I can.

\dmc