These LED matrix modules are amazing! After some research, they are the biggest and cheapest around. The matrix in each module is easily palm sized, and with 5 linked together, I built an internet and bluetooth connected tricolor scrolling display! (the picture would show a test of four that worked very smoothly, but it refuses to upload) They are very fun to put together, with an array (get it) of different components, and plug together in a chainable row for a seamless increase in the length. The mounting holes also accept standard screws for mounting into an enclosure or to each other for structural support. If you find you have to source the ICs yourself, it's going to get pretty expensive very quickly, but Jollifactory provided me with 10 possibly counterfeit but fully functional components free of charge. The possibilities with these are endless. The ledcontrol library from arduino handles complex control over every pixel and with a simple number, you can add more matrices to the chain. I've always wanted to build one of these signs, and Jollifactory have made that project a reality. I can recommend this to anyone, and the quality is superb, fantastic product.
