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4017 IC

Discussion in 'Microcontrollers, Programming and IoT' started by Tinker Unique, Aug 12, 2018.

  1. Tinker Unique

    Tinker Unique

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    Dec 1, 2014
    Hobby project = I have a sequence blinker in mind and have the 555 IC, and need to get a 4017 controller, Also wanted are 12v "micro-lights" to power the project or LED's that broadcast light instead of 'narrow beam'. Since Radio Shack is no more, where can I get such lights ? Will need a dozen red and about 4 yellow. They will be used on a vehicle (12v.)
     
  2. 73's de Edd

    73's de Edd

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    " GOGGLE "
    " Suppliers of grain of wheat lamps "
    or
    " Suppliers of Red and Yellow LED's "
    And that will confirm that Rat Shak wasn't the SOLE supplier on earth, of those two items . . . .hmmmm.
     
  3. kellys_eye

    kellys_eye

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    You will need current limiting resistors for the LEDs too.
     
  4. KJ6EAD

    KJ6EAD

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    Aug 13, 2011
    You will need driver transistors; the CD4017 outputs can only source or sink a few mA. I'd probably use 2N7000s.
     
  5. Audioguru

    Audioguru

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    The datasheet for the CD4017 shows that with a 12V supply (14.4V in a vehicle) its output current into a 2V red LED is typically 27mA which is enough to smoke its output transistors. (14.4V - 2V) x 27mA= 335mW in each output transistor but the max allowed dissipation in each output transistor is only 100mW. With 240 ohm current-limiting resistors then the current can be 18mA and the CD4017 will not overheat.

    I harvested LEDs of many colors that have a very wide 180 degrees viewing angle from Christmas tree LEDs that people threw away. The top of these LEDs is dented and not round and I have never seen them sold in electronic parts stores.
     

    Attached Files:

    kellys_eye likes this.
  6. KJ6EAD

    KJ6EAD

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    That's fine if and only if the O.P. doesn't intend any parallel connection of his "dozen red and about 4 yellow" LEDs. I usually assume a reasonable, delimited for hot weather, design current for the CD4017 to be ≈15mA at 12V.

    Inverted cone, also known as straw hat, helmet, dented lens, etc. LEDs are readily available new.
     
    Last edited: Aug 13, 2018
  7. Tinker Unique

    Tinker Unique

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    Am familiar with the "dimpled" LED's and the broadcast light. Have found them (4.5 v DC) at places like Michael's and Hobby Lobby - powered by 3 AA batteries. Also know that 12v. LED's (Christmas & regular) can be found at many truck stops. The "inverted cone" can also be made with a Dremel, and a slight coat of clear fingernail polish - it works IF careful = (wooden clothes pin holding the LED in a vise and Dremel drill press with wood router bit) I have a habit of thinking "out of the box" and it usually works
     
  8. KJ6EAD

    KJ6EAD

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    Your approach to sourcing seems very limited. Unless you have to complete this project in less than 1 week or you just want to tinker as your username may suggest, there's no reason to "carve" your own LEDs or buy expensive, non-optimal devices at local retail stores. We have a resource here that may be useful to you.

    https://www.electronicspoint.com/resources/component-suppliers.34/

    Why not plan and execute the project in a slightly more formal way: defined result, mechanical and electrical design, process steps, bill of materials, etc?

    In my experience, the phrase "out of the box", while intended to convey a claim to superior creativity, is actually used to rationalize abusive, immoral, unsafe, unethical and/or illegal action and conceal an actual creativity deficit.
     
    Last edited: Aug 14, 2018
    davenn likes this.
  9. Doug3004

    Doug3004

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    Can you post a link?

    Regular 5mm/3mm LEDs have a hemispherical top. Those are easy to find.
    Straw Hat LEDs have a rounded convex top. It is not flat, but not nearly a hemisphere either. Those are easy to find also.

    The Christmas tree LEDs have a concave round cone top.... I am another who has only ever seen these LEDs on strings of already-manufactured Christmas tree lights. Does this type have a name? It may be that the LEDs are encapsulated like that by the companies that make the strings of lights. Or maybe it is just a plastic lens held over a normal 3mm LED? I've never taken a Christmas-tree LED apart.

    This page has a close-up picture of one, about 2/3 of the way down the (long) page:
    https://www.aliexpress.com/item/Min...ome-Shopping-Mall-Decoration/32892845192.html
     
  10. KJ6EAD

    KJ6EAD

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    Okay, I'll humor you. Here's one. After this, you have to find your own. ;)

    https://www.moreleds.com/whiteinverted.htm
     
    davenn likes this.
  11. Audioguru

    Audioguru

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    Some of the LEDs in my solar garden lights have a very short clear case with a rounded top that has the chip very close to the top. Then its light is VERY wide angled.
     
  12. shrtrnd

    shrtrnd

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    I'll tell you what. I think of something I want, start researching the circuit that will get me there, then start looking for the parts, .... hours later I find what I need already fully assembled and for sale for $9.99 on eBay.
    Are you sure you don't want to just look for somebody who already invented what you want and is selling it cheap?
     
  13. Tinker Unique

    Tinker Unique

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    There is NO intent to do anything abusive, immoral, or illegal. I have wanted to finish this "project" for over a year. Finances have been a bit strained and I'm just asking for more specific info on parts/components needed. I have a schematic on the original plan, and am trying to confirm the parts needed to complete the 'project.
     
  14. KJ6EAD

    KJ6EAD

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    I was just reacting to a phrase that irks me, not accusing you, though you didn't deny unsafe, unethical or creativity deficit. ;) I have a pet peeve about platitudes.

    I've done a few 555/4017 sequencer projects before. You didn't say what your plan was, just wanted a source for wide dispersion LEDs. For sourcing help it's useful for you to update your user profile with a location. Do you have what information you wanted for your project or is something still needed?
     
    Last edited: Aug 19, 2018
  15. Tinker Unique

    Tinker Unique

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    What I meant by "out of the box" has nothing to do with being superior or arrogant. I was referring to "out of the box" as being different and unique ( NOT ordinary) I like things a bit different , like making lighted ash trays... OR making a teeter totter for a couple lighted snowmen (purchased) in the front garden at Christmas time, that runs on a 12v. system. OR making 7" butterflies for a water garden that have moving wings (clockworks)..
     
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