Teensy Prop Shield Max Current for LED's

[Shadow6290]

Can anyone tell me what how much current the LED driver pins on the prop shield can handle? I'd like to plug in the DotStar LED strip I have but I'm afraid of frying the board with it's current draw (72 LED's, it pulls around 4 amps with all LED's white and at full brightness). I know I can reduce that draw by lowering the brightness but I just wanted a good ballpark number to look out for so I don't damage the board or anything else connected.

 

[PaulS]

Generally, for strips having more than 3 DotStar LEDs, you want to power that strip externally. You don't want the propshield board [or the Teensy Vin pin] to supply significant current to DotStar strips. See this page for more info how to power a strip externally.

By the way, the "LED driver pins" you are referring to are only driving the digital LED_CLK & LED_DAT signals to the first DotStar in the strip. There is not such a thing as a "LED driver pin" for the +5V power. See the schematic below:



Regards,
Paul

 

[Shadow6290]

Generally, for strips having more than 3 DotStar LEDs, you want to power that strip externally. You don't want the propshield board [or the Teensy Vin pin] to supply significant current to DotStar strips. See this page for more info how to power a strip externally.

By the way, the "LED driver pins" you are referring to are only driving the digital LED_CLK & LED_DAT signals to the first DotStar in the strip. There is not such a thing as a "LED driver pin" for the +5V power. See the schematic below:

View attachment 23840

Regards,
Paul

Ok so it's meant to be a passthrough for Vcc/Gnd if you wanted to say daisy chain a couple of these. Gotcha. Thanks!