Thanks again for the response, really appreciate the thorough explanations here. Curious little bit more if you don’t mind!
When picking up an amp, I know there are both 12V LEDs and 12V amps. Do 12V amps play nicely with 5V LED strips, and vice versa?
NOOOOOOO! Definitely not. Also, it’s not an amp. That’s a different thing. What you are looking for is an AC to DC switching power supply.
Is it in my best interest to get one or the other for flexibility’s sake in case I want to scale up later, or is a 5V fine for most practical uses?
5V is fine unless you wanna do really long runs without injecting power frequently. 12V is really more for lighting up your whole house. And the “pixels” are wider… usually 3 LEDs each.
Also, unless I am blind I am not seeing 5V amps from Meanwell on amazon that are > 18A.
Amazon will rip you off on those, buy from Mouser or Jameco -> https://www.jameco.com/z/LRS-200-5-MEAN-WELL-200W-5V-40A-Single-Output-Switchable-Power-Supply_2219719.html
I had looked at some Alitove amps and Alitove seems to has more options. Do you have experience with those products?
I do not. Don’t cheap out on power supplies. They’ll just die and take your LEDs with them.
I am ultimately trying to not have to buy the same foundational pieces in the event I want to change my LEDs or anything like that if I can avoid it. I understand that after a certain number of LEDs I would have to add more amps/allPixels, I just want to maintain flexibility while I can.
A solid 40A @ 5V supply like I linked above will do everything you need and more for many projects to come.
Thanks a bunch for the clarification between the AllPixel and PiPixel, very clear and concise! Quick follow-ups: LightShowPi requires a, well, Pi, right? How easy is it to replicate its functionality through BiblioPixel with an AllPixel? Additionally, if I did want to get a PiPixel in the future, is it possible to order that with the soldering already done? I don’t have a soldering kit and would rather not buy one for just that.
I really don’t know how to use LightShowPi to be honest. It’s possible to do something similar with BP but I can’t point you to a direct example. If people want LightShowPi features, they use that. Otherwise they use BiblioPixel.
And no, we do not offer the PiPixel pre-assembled.
I’ve never actually seen the strips before (obviously understand how the strings work out), but with the strips they seem to essentially come in spools. Do those strips have much flexibility if, for example given a 100 LED strip wanted to go 10x10? Or are they mostly for things like wrapping a tree?
I’ve built plenty of matrix displays out of strips. Totally possible. But you’ll need to cut up the strip and resolder the connections.
On Thu, Oct 25, 2018 at 10:53 PM Ron Nicholas.Talmage.Robinson@gmail.com wrote:
Thanks again, really appreciate it, everything’s been super clear and very very helpful.
On Thursday, October 25, 2018 at 9:32:04 PM UTC-5, Adam Haile wrote:
On Thu, Oct 25, 2018 at 9:48 PM Ron Nicholas.Tal...@gmail.com wrote:
Thanks for the quick and thorough reply! Really appreciate that.
Regarding the power - what specs specifically from Meanwell would you recommend? For example this 5V 18A 90W amp? How many LEDs can that reliably power? Same question for the AllPixel vs PiPixel.
General rule is 0.06A per pixel. So 18A / 0.06A = 300 pixels at max brightness white. 500 would work fine for normal usage.
You can always switch over to a PiPixel or something else later (if yo uuse bibliopixel).
Can you clarify this? Can I not run Bibliopixel on an AllPixel? Can I connect an AllPixel to a Pi as well as a normal PC? And lastly, is there soldering required on my end for either the AllPixel or PiPixel? It seemed that way when I watched the video for the PiPixel announcement blog, but I am far from familiar with soldering so may as well ask Lastly, do I have to locate/provide cables for the AllPixel/PiPixel?
AllPixel and PiPixel provide a similar result but through very different means.
The AllPixel is a translator. Normal computers cannot “speak” directly to LED strips. So you run BiblioPixel on your computer (Windows, Mac, Linux) and it sends serial data to the AllPixel, which then translates it into the datastream required by the LED strips. The AllPixel cannot run by itself without a host system running BiblioPixel. But yes, you can use it over USB with a Pi just as you would a regular computer. However…
The Pi, unlike a normal laptop or desktop, can speak directly to LED strips with only a little help. The PiPixel is that help. It provides voltage level shifting and power management. But the Pi itself is speaking directly to the LED strips. Either by BiblioPixel or another compatible library. BiblioPixel was written originally to help abstract the difference between using something like the AllPixel and a Pi directly. You animations and setup can be exactly the same, but you just switch your configuration to use the SPI (What the Pi uses) output instead of the Serial (What the AllPixel uses) output. Everything else is the same.
The AllPixel is ready to go. But you need a microUSB cable (which we also sell).
The PiPixel is a kit that must be soldered. But requires no cables. It connects directly to the Pi.
String vs Strip is just a question of aesthetics and what you are going for.
The more important concern is the type of LEDs. The major ones are WS2812 (also called NeoPixel) and APA102/SK9822 (also called DotStar). For 500 leds max, WS2812 are fine. They are cheaper and work find for low pixel counts. But they are slow. If you need more pixels or higher than ~20fps framerates, use APA102.
I could go on and on, but that should cover the basics.
Do you have a specific recommendation on specific LED strips or strings? I had been looking at these from Alitove, but they are WS2811 (I know a lot of the writing about these projects call that code series WS281*), so I assume they are similar/interchangeable? I don’t see many APA102 options on Amazon if you have a rec there.
Those are likely fine. And yes… WS2811 == WS2812 as far as you need be concerned. Most of the stuff you’ll find on Amazon or ebay is likely fine. I buy all mine from here http://www.pixel-leds.com - But only because I buy a lot. I’m getting them direct from China at wholesale prices. They are super cheap but you have to buy a lot at once. So I recommend sticking to Amazon or ebay. Skip places like Adafruit or Sparkfun. Definitely support them for their other products, but their LED prices are insanely high.
You received this message because you are subscribed to the Google Groups “Maniacal Labs Users” group.
To unsubscribe from this group and stop receiving emails from it, send an email to email@example.com.
To post to this group, send email to firstname.lastname@example.org.
To view this discussion on the web visit https://groups.google.com/d/msgid/maniacal-labs-users/37cf270e-0381-4b07-8572-94e1eda7982d%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.