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WS2812 doesn't work with mosfet and 12V
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WS2812 doesn't work with mosfet and 12V

by vostok1 on Wed Oct 04, 2017 4:27 am

Hello,

WS2812 doesn't work with mosfet and 12V and need your help.

I am tring to develop high power LED light system for getting high light intensity with PWM.
Then I chose "Neopixcel Adafruit WS2812 light strip" and controlled by Arduino UNO.
At least 200-250 LED (with Max brightness) is needed, so I thought I need external power unit and MOSFET.

Then I tried wiring following to this page (https://learn.adafruit.com/rgb-led-strips/usage).
However WS2812 has different port (+5V, DI, GND), so I confused about wiring.
So I replaced R,G,B port as DI, +5V port is wired to external power unit (+) and GND port is wired to Arduino GND port.
However WS2812 didn't work, I think wiring was wrong and I want your advices.

Here're my equipments.
LED strip: WS2812 (242 LED is connected)
MOSFET: IRF520
External power unit: COSEL R10A-12 (12V, 0.9A)
Resistance: 10k ohm

Thank you.
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vostok1
 
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Re: WS2812 doesn't work with mosfet and 12V

by franklin97355 on Wed Oct 04, 2017 4:59 am

Neopixels are +5 volts MAXIMUM. Applying 12 volts has probably destroyed them. Please read and understand this Neopixel Uberguide

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Re: WS2812 doesn't work with mosfet and 12V

by vostok1 on Thu Oct 05, 2017 3:45 am

Thanks for fast reply.

Ah, OK I understood.
Then should I try 5V with high amps external power unit?

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Re: WS2812 doesn't work with mosfet and 12V

by franklin97355 on Thu Oct 05, 2017 12:33 pm

Then should I try 5V with high amps external power unit?
That should work if the pixels aren't damaged.

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Re: WS2812 doesn't work with mosfet and 12V

by vostok1 on Fri Oct 06, 2017 1:16 am

franklin97355 wrote:
Then should I try 5V with high amps external power unit?
That should work if the pixels aren't damaged.


Thanks franklin, I don't have 5V supply so far, I will get and try soon!
Then you mean wiring is not wrong??

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Re: WS2812 doesn't work with mosfet and 12V

by franklin97355 on Fri Oct 06, 2017 2:04 am

Follow the Uberguide I linked above.

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Re: WS2812 doesn't work with mosfet and 12V

by vostok1 on Fri Oct 06, 2017 3:19 am

I missed left side menu of that link, thank you.

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