JLCPCB Prototype for $2(Any Color): https://jlcpcb.com
My new PCB uses a dual 555 timer (it's called a 556) in both astable and monostable modes to produce a variable pulse width oscillator running at about 1kHz.

By Julian

Youtuber, shed dweller, solar charge controller aficionado

14 thoughts on “New pcbs from jlcpcb – dual 555 timer oscillator pt 1”
  1. Avataaar/Circle Created with python_avatars Bruce Morgan says:

    Julian – I love your ingenuity, but FFS – just buy a 556, they are like 9p each. Great video as always btw ๐Ÿ™‚

  2. Avataaar/Circle Created with python_avatars paul meynell says:

    Get a 556 so we can see clearly what is happening!

  3. Avataaar/Circle Created with python_avatars Nicholas Barnes says:

    There is a third option – design a new PCB daughter board which takes two 555's and gives the pinout of a 556 to plug into the oscillator board. ๐Ÿ™‚

  4. Avataaar/Circle Created with python_avatars Daves Tech says:

    Should have made the board able to take both 555 and 556 to start with.

  5. Avataaar/Circle Created with python_avatars Minoz says:

    Buy a 556!

  6. Avataaar/Circle Created with python_avatars Mike oliver says:

    Please just for us contort a second 555.

  7. Avataaar/Circle Created with python_avatars Stuart Hatto says:

    Get the 556 – pity Maplin has gone, you could be making the second video now. Are there any High Street electronic stores in the UK anymore?

  8. Avataaar/Circle Created with python_avatars jlucasound says:

    You are Awesome, Julian! May the Sun Shine on you always. (You may have to migrate). ๐Ÿ˜‰
    I truly Love Your videos. I watch the other guy, too. The one on the Island? Ya, you and him are my favourites.
    I don't really need explosions to be entertained but sometimes I like the excitement. Other times I like to relax and watch someone build something from scratch. Audio or Audio Manipulation I find interesting. LED's are cool, too. (Well, usually :-))
    I love the 555 timer chip. I just learned, here, there is a 556. I like how you show the properties and similarities of both. I am learning from great teachers like you. Thanks, Man! Cheerio.

  9. Avataaar/Circle Created with python_avatars Gregory Thomas says:

    I do believe it's time to mangle a triple-nickel! ๐Ÿ™‚

  10. Avataaar/Circle Created with python_avatars Adrian Finn says:

    Steal a 556 from your Fruit Machine project lol

  11. Avataaar/Circle Created with python_avatars Andy Timmons says:

    Oh for goodness sake, take my patreon money and buy yourself a 556.

  12. Avataaar/Circle Created with python_avatars Tested to Destruction says:

    its an RC filter on the plus11v minus11v lines

  13. Avataaar/Circle Created with python_avatars Defpom's Electronics Repair says:

    Get the right part, Iโ€™ve got one you can have but it will take a while to get there LOL.

  14. Avataaar/Circle Created with python_avatars Helmuth Schultes says:

    Reason why 555s are very noisy is they draw huge, over 200mA spikes during switching transition. The CMOS 7555 does not!

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