I checked each LED using a battery and resistor ... We do need to add ping-pong balls as diffusers before the display will be finished but if there’s a problem you don’t want to have to ...

[david] designed an LED ping-pong ball display using 3D printed components, which allows for the construction of arbitrarily-large LED displays thanks to a strictly modular design. The basic unit ...

As the clock hovers closer and closer to New Year's midnight, millions turn on their screens to witness that glittering New Year's ball fall in the heart of New York: it is a wonderful display whose o ...