Connect with us

LED science fair question

Discussion in 'LEDs and Optoelectronics' started by hsp, Feb 3, 2014.

Scroll to continue with content
  1. hsp


    Feb 3, 2014
    We are doing the old fruit cell battery science fair experiment. Our fruit is generating 1.54V. How is it possible that we are able to power an LED that is 2.4V, 20mA? Granted, it is only emitting a faint light, but it seems to us that it shouldn't work at all. Please help this mama.
  2. BobK


    Jan 5, 2010
    2.4V and 20mA is just one point on the I/V curve of the LED. It will draw less current at lower voltages and more current at higher voltages.

  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    What would happen if you had 2 pieces of fruit?

    Could you connect them in such a way that the voltages were added together?
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Similar Threads
There are no similar threads yet.
Electronics Point Logo
Continue to site
Quote of the day