Will the data signal be strong enough for 8 m of NeoPixels?

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BrorH
 
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Will the data signal be strong enough for 8 m of NeoPixels?

Post by BrorH »

I have 8m of neopixel strips (30 leds/m), bought as two reels. If I solder them together to one, will the data provided at one end still reach the other end?
I am asking because on the uberguide it says that the VCC drops of (due to resistance). Will the same be true for the data?

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adafruit_support_bill
 
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Re: Will the data signal be strong enough for 8 m of NeoPixe

Post by adafruit_support_bill »

The signal will not drop off because each pixel is a 'repeater' and re-transmits the signal to the next pixel in the strip.

But voltage drop over the length of the strip can be a real problem for long strips. With 240 pixels, I'd recommend at minimum a power feed to each end of your 8m strip.

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BrorH
 
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Re: Will the data signal be strong enough for 8 m of NeoPixe

Post by BrorH »

adafruit_support_bill wrote:The signal will not drop off because each pixel is a 'repeater' and re-transmits the signal to the next pixel in the strip.

But voltage drop over the length of the strip can be a real problem for long strips. With 240 pixels, I'd recommend at minimum a power feed to each end of your 8m strip.
Thanks for the answer! I have added 4 power feeds, separated at a distance of 2 m each. That should suffice, right?

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DanGR
 
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Re: Will the data signal be strong enough for 8 m of NeoPixe

Post by DanGR »

adafruit_support_bill wrote:The signal will not drop off because each pixel is a 'repeater' and re-transmits the signal to the next pixel in the strip.
That statement would be very handy for the neopixel uber guide power page.

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adafruit_support_bill
 
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Re: Will the data signal be strong enough for 8 m of NeoPixe

Post by adafruit_support_bill »

Yes. A feed every 2 meters would be excellent.

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