hi, i'm searching a battery powered display (about 25X25 cm) that i can control with the smartphone.
At first, i searched a display based on led ws2812 controlled via arduino, but only one led assorbe about 50/60 mA and if i use a 32x32 pixels display it consum a lot.
After some research i find led matrix 64x64 pixels that i can power with a 5 Vdc powerbank.
i attach some image:
After some tests, if i power it with a white image at the maximun of the luminosity, it assorbe only 1.58A!
i don't know a lot of elettronics but how can it possible ?
someone know something about this display?
another problem is that the comunication with the smartphone use WIFI and not bluetooth, why?
bluetooth is not enough powerful to transmit the image to the display?
i hope that someone can help me clear my head.