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    Please help to identify. Thanks.

    Good morning everybody!
    I am newbie and just started learning about electronics and soldering.
    I would be greatly appreciated if some one knowledgeable can help me identify electronic part I need for my project.
    It supposed to be a 15Hz pulse or frequency generator (I am not sure). It has blue LED that reflects frequency pulsation rhythm.
    This part is tiny and powered by 9V battery.
    I have attached picture of this part for your reference.
    Attached Files

    #2
    Basic Circuit:

    Click image for larger version

Name:	555curcuit.jpg
Views:	1
Size:	8.8 KB
ID:	981985


    Components:

    1. Timer IC 555 (TL555 or NE555)
    2. Resistor 22K (R1)
    3. Resistor 470K (R2)
    4. Capacitor 0.01uF
    5. Capacitor 0.1uF (C1)


    This should give you a frequency of 15Hz.

    If want to connect a LED to the output, need to place a resistor in series with the LED.
    Value of the resistor from 330 to 1K (depending on the supply voltage and brightness you want).

    Comment


      #3
      Originally posted by nb8686 View Post
      Basic Circuit:

      [ATTACH=CONFIG]146010[/ATTACH]


      Components:

      1. Timer IC 555 (TL555 or NE555)
      2. Resistor 22K (R1)
      3. Resistor 470K (R2)
      4. Capacitor 0.01uF
      5. Capacitor 0.1uF (C1)


      This should give you a frequency of 15Hz.

      If want to connect a LED to the output, need to place a resistor in series with the LED.
      Value of the resistor from 330 to 1K (depending on the supply voltage and brightness you want).
      Thank you for prompt and comprehensive explanation! I am very appreciated.
      Can I buy it from somewhere already assembled to save time? What is the the name of this thing?
      Thanks.

      Comment


        #4
        You can try Sim Lim Tower.

        Comment


          #5
          Alternatively, you can buy a cheap micro-controller board, write a simple program to generate the 15Hz output.

          Such as this one:

          Click image for larger version

Name:	Arduino_nano.jpg
Views:	1
Size:	10.6 KB
ID:	981986

          Comment


            #6
            Lazada is selling the 555 pulse generator module.

            Comment


              #7
              Originally posted by nb8686 View Post
              Alternatively, you can buy a cheap micro-controller board, write a simple program to generate the 15Hz output.

              Such as this one:

              [ATTACH=CONFIG]146014[/ATTACH]
              I will try to search at the Sim Lim Tower tomorrow.
              Thank you very much nb8686!

              Comment

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