RGB LED's on LED Shim


#1

I’m liking the looks of the new LED Shim. Just wondering if there are any plans to use those RGB LED’s on anything else, like the scroll phat for instance? Having to pick just one color is a bit of a let down for me. Spoiled I guess as my sense hat lets me change the text color on the fly.


#2

They are- iirc- the very same LEDs we use on Unicorn HAT HD. Which should give you a ballpark on the cost/complexity of making something like a Scroll pHAT of that density. We might crank out a Unicorn pHAT HD though since that would be a fairly close approximation of what you want- 8x16 pixels I guess? (if they’ll fit)


#3

A Unicorn pHat would work. I like using scrolling messages so I just figured that would be easier to do on a “Scroll” Phat HD, than on say a Unicorn pHat HD. At the moment my post was more of a just wondering type of deal.
I guess I’m spoiled to be honest. Scrolling messages is easy peasy on my Sense Hat. And changing the color of those messages on the fly is also easy. I’m currently mulling over replacing my sense hat with a Unicorn Hat HD. I was using the sensors on the Sense Hat but have switched to a BME680 for that. Now I’m wanting a bigger display with more LED’s. The coding in python part looks a little trickier though. I haven’t let that stop me in the past though.
I’ve also been wanting to do something zero sized, but the one color limitation kind of throws me off, thus this inquiry. Thanks for the response though, its encouraging. You guys always seem to come up with cool new stuff I didn’t know I wanted or needed until I see it, lol. ;) =)


#4

I bought an LED shim, hasn’t arrived yet but its on its way. =)


#5

Anyone know what model of LEDs these are? I have a project that needs small RGB LEDs and these look really good.


#6

The ones on the LED shim are small compared to what’s on my Sense hat, about half the size. Still plenty easy to see when lit up though.
I also bought a Unicorn Hat HD, not sure if its the same LEDs though. I have a diffusor on both and would have to disassemble to physically compare the two. Only just started playing around with the Unicorn Hat HD, only ran a few test examples so far to make sure I had no dead LED’s etc.


#7

Yeah. I wonder what the part number is for them. Anyone know? or know how to find out?


#8

I have no idea. I have a second LEDshim, if I can find my magnifying glass I’ll give it a close inspection and see if I can see any markings. I’m thinking thats likely on the back side of the LED though.


#9

By way of an update to this- we are definitely keen to see what else we can stick these LEDs on, but have to find the right matrix layout/driver IC pairing to make it work!

I don’t know what particular part we’re using- but they are fairly generic 2020 RGB LEDs in a 4-pin configuration (common cathode/anode).