Description: The WS2812B may look like a common 5050-sized (5x5mm) SMD LED, but there’s actually an integrated control circuit embedded inside there too. If you look really hard, you can see the tiny black chip hidden in there, along with minuscule gold wires connecting the chip to the LED. This LED is certainly more than meets the eye! The ‘B’ at the end of the WS2812 name denotes that these specific LEDs are equipped with and only require FOUR pins instead of SIX!
The LED itself is unlike most RGB (Red/Green/Blue) LEDs. The brightness of each color can be adjusted using a serial string to one of 256 different levels. That means there are 16,777,216 (2563) possible combinations of colors. You can produce any color from white to black (off), or salmon to sienna.
Based on 3 ratings:
These LEDs were easy and fun to work with! The only downside to working with such small LEDs, and other small components as well, is the pins ended up being very fragile. After soldering, be very careful with handling the LEDs. The solder joint was stronger than the pins themselves. On 4 of my LEDs, the Din pin snapped off because of an accidental tug on the wire that was soldered to it. I guess that’s the trade-off for having small components, however.
Once you get these running, they’re the cats ass for sure. I embed these in all sorts of projects. The only issue I have is during the reflow process. I use solder paste and a reflow oven and I have failures, 2 in 10 (firing a standard reflow curve). I then use my hot-air rework to drop in replacements. I e-mailed Adafruit about this a while ago, and they said their supplier said they needed to be tempered before reflowing? Never heard that term before. Can you offer any advice Sparkfun?a