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RGB LED Controller on eBay — Parallax Forums

RGB LED Controller on eBay

NWCCTVNWCCTV Posts: 3,629
edited 2014-10-25 20:05 in General Discussion
Has anyone tried these out yet? I am thinking about ordering a couple just to play with but the price is a little much for just playing with. However, if they are small enough they could definitely save on space over using a Prop just to control some LED's.

Comments

  • David BetzDavid Betz Posts: 14,516
    edited 2014-10-23 18:27
    NWCCTV wrote: »
    Has anyone tried these out yet? I am thinking about ordering a couple just to play with but the price is a little much for just playing with. However, if they are small enough they could definitely save on space over using a Prop just to control some LED's.
    They probably use an ATtiny85 chip. The AdaFruit site has information about using those to control strings of these RGB LEDs (like the ones Parallax is about to sell). Also, AdaFruit has a board called the Trinket that costs around $7 and has an ATtiny85 on it. The ATtiny85 chip by itself is about $1.50. However, it's a lot more fun programming a Propeller to do this! :-)
  • NWCCTVNWCCTV Posts: 3,629
    edited 2014-10-23 19:17
    However, it's a lot more fun programming a Propeller to do this! :-)
    Yes, but for one off projects that only use the LED's, the Prop is overkill.
  • David BetzDavid Betz Posts: 14,516
    edited 2014-10-23 19:20
    NWCCTV wrote: »
    Yes, but for one off projects that only use the LED's, the Prop is overkill.
    Yes, but does overkill really matter for one off projects? Now, if you are planning to make 100 of these then the difference between $18 for the controller you mentioned and $25 for a PropMini might make a difference.
  • xanaduxanadu Posts: 3,347
    edited 2014-10-24 13:41
    You can have a Propeller for $8 - http://www.parallax.com/catalog/microcontrollers/propeller/chips

    If you're planning on building a lot of something (including one offs) starting making your own boards now, I don't think it makes sense to not do it. There are millions of tutorials and you don't need much to get started.
  • David BetzDavid Betz Posts: 14,516
    edited 2014-10-24 13:46
    xanadu wrote: »
    You can have a Propeller for $8 - http://www.parallax.com/catalog/microcontrollers/propeller/chips

    If you're planning on building a lot of something (including one offs) starting making your own boards now, I don't think it makes sense to not do it. There are millions of tutorials and you don't need much to get started.
    I'd love to try making my own PCB. I should look around for those tutorials and make something simple to start.
  • Duane DegnDuane Degn Posts: 10,588
    edited 2014-10-24 14:01
    If you buy the chips 25 at a time they're $6.7916 each (as least that's what I paid Digi-Key last time I purchased some).

    I'm hoping to make nine of these on a 10cm x 10cm board a lot of fab houses offer.

    attachment.php?attachmentid=111621&d=1414184168

    I looking for an inexpensive way to add Propeller to projects.

    The I/O pin headers are arranged the same as Jazzed's TetraProp board.

    These $2.20 boards can both program and power the boards (there's a 3.3V regulator on the back too).
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  • David BetzDavid Betz Posts: 14,516
    edited 2014-10-24 14:07
    Duane Degn wrote: »
    If you buy the chips 25 at a time they're $6.7916 each (as least that's what I paid Digi-Key last time I purchased some).

    I'm hoping to make nine of these on a 10cm x 10cm board a lot of fab houses offer.

    attachment.php?attachmentid=111621&d=1414184168

    I looking for an inexpensive way to add Propeller to projects.

    The I/O pin headers are arranged the same as Jazzed's TetraProp board.

    These $2.20 boards can both program and power the boards (there's a 3.3V regulator on the back too).
    Looks nice. Will you be selling them? What is your target price?
  • Duane DegnDuane Degn Posts: 10,588
    edited 2014-10-24 14:25
    David Betz wrote: »
    Looks nice. Will you be selling them? What is your target price?

    I'll probably at least sell the bare PCBs if I get the okay from Steve (he designed the TetraProp). From the previous exchange I had with him he seemed okay with it.

    The only why I'll sell these assembled is if I get a reflow oven figured out. I've used toaster ovens controlled by Propellers to dry ore samples so I'm pretty sure I can get the reflow oven working.

    I've hoping to make these for $15 each (with surface mount parts populated). The bare PCBs will be a couple dollars.

    It will be at least a month before I have any to sell (if I sell them).
  • Duane DegnDuane Degn Posts: 10,588
    edited 2014-10-24 14:56
    I had hoped I could have nine of these boards made at once using the 10cm x 10cm boards, but my DipTrace license tells me I'm using too many pins. I can only place seven on the board.

    attachment.php?attachmentid=111622&d=1414187666

    Hopefully I have enough allowed pins to let me make use of the empty section.

    Each of the squares are 1.3" x 1.3" (minus whatever the saw blade removes). Thinking about the saw blade make me think one of the empty squares should be the center one so no one square has to have all its edges cut.

    Edit: Sorry for hijacking the thread Andy. I was actively working on this board when the talk about the cost of Propeller came up here. My main reason for making this board was to keep the cost low to add Propeller to my projects.

    I purchased several of Steve's great TetraProp boards and cut several of them up into one or two Prop boards.
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  • xanaduxanadu Posts: 3,347
    edited 2014-10-24 15:14
    What is the DIP chopped liver? Surface mount smurfich mount...

    Not entirely kidding. If there aren't a lot of external components and it were a true one-off I'd go DIP and perf board all the way.

    Duane those boards looks awesome! I have a feeling my kitchen toaster oven is going to be re-purposed soon.
  • DomanikDomanik Posts: 233
    edited 2014-10-24 16:09
    Duane,
    I'd like to purchase a couple of these boards assembled. Or blank if that works better for you. This would save me the cost & time of making PCBs that only have a few jelly bean components. Also gets a major honey-do off my list.:smile: I can send you a paypal anytime.
    Dom..
  • NWCCTVNWCCTV Posts: 3,629
    edited 2014-10-24 17:09
    Sorry for hijacking the thread Andy.
    Duane, since it is you, it is not a problem!!! So will these come with or without the Prop? Either way, I would buy some also.
  • DomanikDomanik Posts: 233
    edited 2014-10-24 17:35
    NWCCTV wrote: »
    Duane, since it is you, it is not a problem!!! So will these come with or without the Prop? Either way, I would buy some also.

    Gosh, I felt bad so looked at the item. Haven't used it but it looks like a nice little do-dad and their website has it for $17 instead of $18. It really does a lot and considering it's assembled, 1 year warranty, tech support, and overall had a pretty good feeling about the seller.

    Now you know what I want for Christmas. Bye the weigh, we aren't that far apart so you could just drop it off. :innocent: Have a good one and thanks in advance.

    Dom..
  • NWCCTVNWCCTV Posts: 3,629
    edited 2014-10-25 10:54
    we aren't that far apart
    2 hours last time I made the Portland run!!! I'm sure you have been to Haystack Rock??? One of my most favorite places in the world!!!! There's a few of us up here in the PNW.
  • xanaduxanadu Posts: 3,347
    edited 2014-10-25 12:50
    I was just looking at it, and I'm wondering how it would replace the Propeller?

    It seems to me it's more of a DMX converter that will also accept a microcontroller signal. I could be wrong but even looking at the components on it and a glance at the data sheet doesn't really say much as far as stand alone anything goes.
  • OldFartRadiomanOldFartRadioman Posts: 30
    edited 2014-10-25 13:21
    David Betz wrote: »
    They probably use an ATtiny85 chip. The AdaFruit site has information about using those to control strings of these RGB LEDs (like the ones Parallax is about to sell). Also, AdaFruit has a board called the Trinket that costs around $7 and has an ATtiny85 on it. The ATtiny85 chip by itself is about $1.50. However, it's a lot more fun programming a Propeller to do this! :-)
    DeadBug.jpg
    LedStrip.jpg
    Since someone else brought it up - Attiny85 dead bug style :)
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    1024 x 683 - 71K
  • DomanikDomanik Posts: 233
    edited 2014-10-25 15:25
    NWCCTV wrote: »
    2 hours last time I made the Portland run!!! I'm sure you have been to Haystack Rock??? One of my most favorite places in the world!!!! There's a few of us up here in the PNW.
    Haystack is great. Here's a pic of a tide-pool nearby. Our family likes to vacation in Pacific City.
    Years ago we lived in Bothell when I was stationed at Sandy Point.
    TidePool.jpg
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  • NWCCTVNWCCTV Posts: 3,629
    edited 2014-10-25 20:05
    I think I have been there also. Wife and I have been down that way a few times. Stayed in Tillamook for a few days. Made it as far south as Lincoln City. Actually, a little further south is an old Glass Blowing Shop. They do some pretty awesome work there.
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