Simple 555 oscillator circuit with LED on the output pin. But at high frequencies the LED isn't any use so a loudspeaker can be used instead.

By Julian

Youtuber, shed dweller, solar charge controller aficionado

9 thoughts on “555 timer oscillator driving led or loudspeaker”
  1. Avataaar/Circle Created with python_avatars techmaster90 says:

    For the capacitor on the Oscillator do I need to have a non-polarized capacitor?

  2. Avataaar/Circle Created with python_avatars Stmpavb MLW says:

    Wow finally i found it thanks

  3. Avataaar/Circle Created with python_avatars Kuri the wolf says:

    Why did this only work for me after i put a 10K between 2 & 3?

  4. Avataaar/Circle Created with python_avatars Nader Humood says:

    Good job Sir well done. .๐Ÿ‘

  5. Avataaar/Circle Created with python_avatars Haze Anderson says:

    That's probably the simplest 555 oscillator circuit I have seen yet … using a pot for two resistors … OK this is starting to make sense now. Thanks!

  6. Avataaar/Circle Created with python_avatars Bill Hughes says:

    When implementing the pot for the 2 resistors, what resistance value are you using here and how is it wired into the 555?

  7. Avataaar/Circle Created with python_avatars Isaiah M says:

    A schematic would be super helpful, I agree, but where do I put power in on the chip?

  8. Avataaar/Circle Created with python_avatars Raymond Earle says:

    A very informative video. That's great. Many thanks.

  9. Avataaar/Circle Created with python_avatars Julian Ilett says:

    555 Astable Oscillator driving LED or Loudspeaker

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