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Other ws2812b Power Question

Discussion in 'LED Devices Support' started by Ryan Casler, 20 April 2018.

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  1. Ryan Casler

    Ryan Casler New Member

    Messages:
    2
    Hardware:
    RPi1/Zero, RPi3, +Arduino, +nodeMCU/ESP8266
    I have been doing some searching and can't really find a clear answer to this question. I have purchased ws2812b LEDs, 30/m. The power supply I purchased in the "black brick" style because I didn't to deal with the loud fans that are on the silver "pc-style" power supplies. The obvious drawback being...no voltage adjustment at all. So, I hooked up my power supply to my multimeter ro make sure I had the polarity right and it's reading at 5.6v consistently. Fluctuating periodically between 5.4 and 5.6. My question is, will this damage my LEDs? I know it says that they have to have 5v max...will half a volt matter? I'm planning on running about 3.6m of LEDs and the supply is rated for 10 amps, so I should be good there. Just don't want to burn out this string of LEDs if I can prevent it.

    Oh...and I checked that my meter is calibrated by connecting to the 5v and 3.3v pin on 2 NodeMCU boards I have laying around and on both the 5v pin read exactly 5.1 consistently and 3.3 on the 3.3v pin. So I'm pretty sure my meter is calibrated.
     
  2. Akriss

    Akriss Active Member

    Messages:
    375
    Hardware:
    RPi1/Zero, RPi2, RPi3, 32/64bit, +Arduino, +nodeMCU/ESP8266
    It could.
    Many tutorials recommend a capacitor (1000uf 35V.) on the power line of the led strip. The capacitor should protect the led's from a bit of high voltage.
    [​IMG]
     
  3. Ryan Casler

    Ryan Casler New Member

    Messages:
    2
    Hardware:
    RPi1/Zero, RPi3, +Arduino, +nodeMCU/ESP8266
    I have a 6.3V 1000uF capacitor on the input voltage. But that's still 6.3V. Won't that deliver an over-voltage to the LEDs? I thought the capacitor was to protect from too much current?

    Also, can you post the link to where you grabbed this pic? It talks about notes above and below but obviously I can't see those here.
     
  4. Akriss

    Akriss Active Member

    Messages:
    375
    Hardware:
    RPi1/Zero, RPi2, RPi3, 32/64bit, +Arduino, +nodeMCU/ESP8266