and wondered about the power setup used there.
in the overview you can see that it uses the 3.3V from the board to power the DotStar Strip.
nice that it seems to work :-)
(sadly the datasheet does not say anything about the min supply-voltage or the logic Low/High values...)
the Adafruit Feather M0 Express states it can deliver <[email protected].
so with this setup if i have a image with high white content i could easily crash this limit -
for 5V it is recommend to calculate: 32Pixels * 60mA = 1,92 A
in my build i would like to also use the full output power of the DotStars and power them with 5V
(i will plan some other static-on-modes too...).
so i thought about a different Power-Setup:
Main Power will be a USB-Powerbank with 2-3A output.
as controller my currently favorite is the
FeatherS3 - ESP32-S3 Development Board by Unexpected Maker
or the
Adafruit ESP32-S3 TFT Feather
the easiest way for me would be to use the 5V / USB pins on the boards.
but can this pin / the usb-socket and traces handle the sometimes high current of about 2A?
for the FeatherS3 - ESP32-S3 the datasheet shows a diode in the path from the USB-connector to the USB pin.
the diode is a 500mA type. so this will not work :-(
for the ESP32-S3 TFT Feather the documentation and schematics state
that would work for me. for the traces too?... as well as USB which is the +5V from USB if connected
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researching all this together for this post leads me to the point that i think it is easier to use a second usb-cable for Power Only direktly connected to the LED-Strip...
and then maybe a levelshifter for the data lines...
any thoughts / other ideas on this?!
sunny greetings
stefan