RedShoe

If a D-cell battery and a AAA battery are the same voltage. Then why would you need to ever use a D-cell?

I need just 9 volts to power some LED's (maybe less but it seems to work well with a 9 volt) Would 6 AA's be the same thing? The problem with a 9 volt is the size. I have no way to mount a 9 volt. I DO have a way to mount 6 AA's, but they add way too much weight, and are actually too big for the project.

I know inside 9 volt is 6 AAA's. Would I be able to mount 6 AAA's in place of the 9 volt?

I need 3 volts to power an LED. I was told I'd need 3 volts per LED. So the way I understood it. if I have 2 LEDs I'd need 6 volts. 3 LED's = 9 volts. I ended up using 40 LEDs, but that would mean I'd need 120 VOLTS????

I can power 40 LEDs with a 9 volt with no problem. I haven't even tried less voltage.

The guy at the electronic store said I'd need 12 volts to power 40 LEDs.

This electronic shit is confusing.

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