Shop OBEX P1 Docs P2 Docs Learn Events
LED strips — Parallax Forums

LED strips

xanaduxanadu Posts: 3,347
edited 2013-06-13 15:46 in General Discussion
Nice to see Parallax is selling LED strips. It is your duty to install them whenever possible. The LED overlord has spoken.

Comments

  • ercoerco Posts: 20,261
    edited 2013-06-13 01:15
    Saw that. Can't reply to Emily's new product post, but at 3 LEDs/inch, something's hinky with the current draw specs: 4 A for 5 meters or 2 mA per set of 3 LED's

    At 12 VDC, I sure hope it's 2 mA per inch, not 20 mA!

    http://www.parallax.com/Store/Components/Optoelectronics/tabid/152/ProductID/910/List/0/Default.aspx
  • BeanBean Posts: 8,129
    edited 2013-06-13 11:59
    erco,
    I'm pretty sure it is 20mA per inch. The thee LEDs are in series with a 150 ohm resistor (at least on the white LEDs).
    4A for 5 meter would be very close to 20mA per inch.

    Bean
  • ercoerco Posts: 20,261
    edited 2013-06-13 13:34
    That's a lot of power, 48 watts for 5M. It would be better to run 4-5-6 LEDs in series with a smaller resistor. I was hoping they might be using low current (2 mA) LEDs, but since they call them "high brightness" LEDs, probably not.
  • Ken GraceyKen Gracey Posts: 7,416
    edited 2013-06-13 15:37
    I didn't know we were carrying these and I'm happy to see them in the store!

    Power Shopper erco, we can't compete with your China eBay prices but are we in the ballpark?

    Ken Gracey
  • ercoerco Posts: 20,261
    edited 2013-06-13 15:46
    @Ken: I can tell you that several of the flexible LED strips I bought off EBay are now hard and stiff, probably unusable. Plasticizer evaporated! Stored coiled up in a dark sealed box indoors. Never even got used.

    People, if you buy erco's Ebay China deals, use them right away, don't just hoard them! Do as I say, not as I do!

    In a related story, does anyone want to buy some nice strong spiral LED strips? :)
Sign In or Register to comment.