Here’s an Arduino library that will let you drive a very large number of LEDs. [Elco Jacobs], an electrical engineering student, is the author of the library. He has a work-study job that has… ...

Using an Arduino Nano board together with a 2.2 inch UART HMI display the batteries can provide up to 60w of power output.

So it’s no surprise that [krallja] was able to use an old-style video output chip to drive a TV with an Arduino.