geekhack
geekhack Projects => Making Stuff Together! => Topic started by: SectorOMEGA on Thu, 04 May 2017, 03:29:35
-
Never been dealing with RGB LED strip and teensy so I have a question. Found this in the store next to us: WORLDSEMI HC-F5V-30L-30LED-W IP65 sold in meter :)
My question is based on the below technical specs:
Working Voltage: DC5V
LED resource: WS2812B LED(5050 SMD RGB LED with built-in WS2811S IC)
LED Type: SMD5050 RGB LED Quantity: 30LEDs/Meter
Working Current: 0.06A/Cut ; 1.8A/Meter
Width: 10mm Length: 5 Meters per Reel
Max. Power: 9Watt/meter Viewing angle: ≥140℃
Circuit board: Double FPCB FPCB Color: White/Black
How long can be strip long powered only by the teensy 5v :)
Excuse me for the stupid question but worth giving a try to ask
-
I have a similar strip and arduino clone, and couldnt get more than about 8-10 LEDs lit to full intensity reliably.
USB should supply 100mA before enumeration, and up-to 500mA after enumeration.
0.5A / 0.06A = 8.33 LEDs at full power.
I have managed to light most of the full strip (60 LEDs) in patterns and colours better at lower intensities, but external power would be needed for anything else.
-
Want to try making an under glow for 60% keyboard. And dont want to overload the teensy pin :) So thats why I'm asking. Still digging for some info :)
-
If you look at 60% PCBs with the underglow feature, you'd notice that they have a variable number of square LEDs on two rows.
This b.face, for example, has a total of 16 LEDs. This is because the underglow is actually achieved with translucent case which diffuse the light.
(https://ae01.alicdn.com/kf/HTB139YENXXXXXaLXVXXq6xXFXXXL/bface-60-RGB-underground-copy-pcb-from-china-gh60-pcb-Customize-keyboard-PCB.jpg_640x640.jpg)
I'm saying this because you don't actually need a whole LED strip to achieve your effect.
You should run some tests in the case you plan to use.
-
Will try later to see how it will go with small amount. Also will be starting the wooden casing for the 60%
-
Will try later to see how it will go with small amount. Also will be starting the wooden casing for the 60%
I doubt you can get any significative underglow in a wooden case. Backlighting alone would be a good solution anyway.
-
The RGB is for my current one :D For the wooden one I have and idea for making thin hollow lines but will see :D
-
With a significant amount of design and work you can use diffusion lenses to make the case appear mostly wood while giving underglow. Lining it up well and getting the underglow to be noticeable is the tricky part. It sounds a lot more trivial than it is.