Author Topic: Cheap Pi ZeroW Board with the minimum for WS281x  (Read 1147 times)

Offline Bwinter

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Re: Cheap Pi ZeroW Board with the minimum for WS281x
« Reply #15 on: October 12, 2018, 10:47:55 AM »
Has anyone been able to develop this?  I have a gerber-file that I'm about to send off to print.


Basically, it's a Hat designed to sit on a PiZero (Zero Hat) and ONLY drive two WS281x outputs (both buffered).  20A input fuse, and four 5A fused outputs (two data-power lines, and two power-injections).  The overall footprint is about 25% larger than the PiZero itself.

Offline Bwinter

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Re: Cheap Pi ZeroW Board with the minimum for WS281x
« Reply #16 on: November 06, 2018, 11:14:37 PM »
So to close this out, I finally came up with a PiZero Hat I was happy with:  sits on top of a PiZero W, two WS281x outputs (data and power) and two power injection outputs.  All four power outputs are fused w 5A.  The hat also drops the voltage down to 5V to power the Pi.

Offline JonB256

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Re: Cheap Pi ZeroW Board with the minimum for WS281x
« Reply #17 on: November 07, 2018, 06:04:46 AM »
That is pretty sweet. Especially handling the Power concerns.

Offline pixelpuppy

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Re: Cheap Pi ZeroW Board with the minimum for WS281x
« Reply #18 on: November 07, 2018, 07:56:46 AM »
Those could be handy  :)    Do you plan to offer them for purchase?  What is the estimated cost?
xLights and Vixen3 for sequencing / FPP for scheduling and playing / Falcon controllers for pixels / homemade controllers for everything else

Offline Bwinter

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Re: Cheap Pi ZeroW Board with the minimum for WS281x
« Reply #19 on: November 08, 2018, 12:27:22 AM »
I have a few extra blank PCBs sitting here.  I wish there was a better way to make things like this more readily availablethere obviously wouldnt be a high demand, but I think theyre something that can be useful in various situations.

Offline rjhodgefamily

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Re: Cheap Pi ZeroW Board with the minimum for WS281x
« Reply #20 on: November 08, 2018, 04:50:30 AM »
Not necessarily the cheapest way, but you could always just upload it to oshpark and give a mouser or digikey list of materials. Then people who want it can just pay for all of it and avoid doing a co-op or presale at least until after the new year.

Offline rjhodgefamily

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Re: Cheap Pi ZeroW Board with the minimum for WS281x
« Reply #21 on: November 08, 2018, 05:17:13 AM »
Also do you have an estimated max node count? Is it comparable to the falcon picap of 1600 at 40fps or is it less than that?

Thanks,
Richard

Offline JonB256

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Re: Cheap Pi ZeroW Board with the minimum for WS281x
« Reply #22 on: November 08, 2018, 06:24:52 AM »
I have a few extra blank PCBs sitting here.  I wish there was a better way to make things like this more readily availablethere obviously wouldnt be a high demand, but I think theyre something that can be useful in various situations.
While its a little busy right now before Christmas to worry about, I have two PiZero's that would Love to wear that hat.

(though I really should replace them with PiZero Ws. Hanging a USB dongle off to the side is a pain. :) )

Offline pixelpuppy

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Re: Cheap Pi ZeroW Board with the minimum for WS281x
« Reply #23 on: November 08, 2018, 06:52:47 AM »

While its a little busy right now before Christmas to worry about, I have two PiZero's that would Love to wear that hat.

DITTO!  ;) 




Also do you have an estimated max node count? Is it comparable to the falcon picap of 1600 at 40fps or is it less than that?

Hats like this are basically just GPIO level shifters.  All pixel control and timing is done by the FPP software on the Pi, not the hat.  The limits will be the same for all the different flavors of Pi Pixel Hats.  So this board, like the others should be about 800 pixels per port @40fps and 1600 pixels per port @20fps

Offline rjhodgefamily

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Re: Cheap Pi ZeroW Board with the minimum for WS281x
« Reply #24 on: November 08, 2018, 07:02:56 AM »
For node count that is what I thought but wasnt sure since the processor and ram are so much lower on the zeros.

Offline Bwinter

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Re: Cheap Pi ZeroW Board with the minimum for WS281x
« Reply #25 on: November 08, 2018, 07:42:16 AM »
Also do you have an estimated max node count? Is it comparable to the falcon picap of 1600 at 40fps or is it less than that?

Thanks,
Richard

Its exactly the same as a regular PiCap except that it just drives WS281x.  So the same pixel-count as the other caps.

Offline Bwinter

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Re: Cheap Pi ZeroW Board with the minimum for WS281x
« Reply #26 on: November 08, 2018, 07:43:56 AM »

While its a little busy right now before Christmas to worry about, I have two PiZero's that would Love to wear that hat.

DITTO!  ;) 




Also do you have an estimated max node count? Is it comparable to the falcon picap of 1600 at 40fps or is it less than that?

Hats like this are basically just GPIO level shifters.  All pixel control and timing is done by the FPP software on the Pi, not the hat.  The limits will be the same for all the different flavors of Pi Pixel Hats.  So this board, like the others should be about 800 pixels per port @40fps and 1600 pixels per port @20fps


Yupthis has the same HCT level-shifter as many other boards use.

 

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