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AcidMods Resources ----- ( These are helpful tools for modding ) => Electronics Projects => Topic started by: noobpsphacker on July 26, 2009, 10:29:25 AM

Title: Forward Voltage of LEDs?
Post by: noobpsphacker on July 26, 2009, 10:29:25 AM

Long story, but I need to tape some LEDs to batteries so they'll light up.
I can't seem to find any button cell batteries over 3v. The forward voltage for most LEDs I've found is over 3v. Only a few colors of 10mm and 5mm LEDs are under 3v. If the forward voltage of an LED is 3.1-3.4v, then will I still be able to power it with a 3v button cell (I plan on using a unch of CR 2032 button cells)?

Title: Re: Forward Voltage of LEDs?
Post by: 802Chives on July 27, 2009, 08:05:32 AM

sometimes 3.4Vf LEDs will work from a 3V 2032 cell....

but if you are using a bunch of 2032 then just stack em together in series and use 6V for your LEDs :dntknw:

Title: Re: Forward Voltage of LEDs?
Post by: noobpsphacker on August 05, 2009, 07:07:44 AM

Quote from: 802Chives on July 27, 2009, 08:05:32 AM

sometimes 3.4Vf LEDs will work from a 3V 2032 cell....

but if you are using a bunch of 2032 then just stack em together in series and use 6V for your LEDs :dntknw:

Wait... You mean if I put two 3v button cells together it'd be 6v? Sh*t. I'm stupid. Common sense. i never thought about multiple batteries. Okay. Thanks so much for the help. I appreciate it =)

Title: Re: Forward Voltage of LEDs?
Post by: 802Chives on August 05, 2009, 08:33:33 AM

not stupid, just had tunnel vision for a second....

Happens to me all the time, sometimes you think so hard about things you lose track of the simple things, and all it takes is a second pair of eyes to snap you out of it :winker:

Title: Re: Forward Voltage of LEDs?
Post by: Jumbo on August 05, 2009, 11:01:32 AM

What i like to do if im running LED's off batteries is get a AA battery holder they usually have 3 battery ones and its about 3.6 volts and easily replaceable :P