CrazyEngineers
CrazyEngineers

  • What does this diode do please?

    kingswood

    Member

    Updated: Oct 23, 2024
    Views: 948
    hello can anyone tell me what the LED in this circuit is for? Is it just a power on indicator or does it do diode related stuff? The 300k resistor is actually a touch sensor grid, with 300k being assumed resistance of human finger.

    Thanks heaps for any advice!

    [​IMG]
    0
    Replies
Howdy guest!
Dear guest, you must be logged-in to participate on CrazyEngineers. We would love to have you as a member of our community. Consider creating an account or login.
Replies

  • Munguti

    Member • Aug 24, 2008

    i think it limits the voltage across the 2.7k resistor to 24-2.1v=21.9v
    Are you sure? This action cannot be undone.
    Cancel

  • Ashraf HZ

    Member • Aug 24, 2008

    LEDs are generally used for indication purposes, so my guess is that its just an indicator. 2.7K resistor is used for protection purposes 😀
    Are you sure? This action cannot be undone.
    Cancel

  • kingswood

    Member • Aug 25, 2008

    thanks guys i appreciate the help
    Are you sure? This action cannot be undone.
    Cancel
Home Channels Search Login Register