I know this is already a topic, but that topic is closed and somewhat outdated. What I mean by a neural net is a system that can make letters from certain pixels (look at summary below).
Neural Network AI Developing Resources
What is a Neural Net?
How the Neural Network Works
(Image 1: We start out with 16 pixel image and 16 neurons, each of which look at the specific value of each sprite. Image 2: They then send this value to a set of 20 nodes which each compare the output of these signals and give their own output based on some rule. Image 3: For example In this node it might be able to find the average value between these four adjacent lines, ignoring all other inputs. Image 4: The results for all 20 of these comparisons are then sent through to the next layer of the network, which does another round of comparisons.)
(Image 5, 6, 7, 8, 9 & 10: subsequent layers do more and more analysis, eventually leading to the final output layer, which by this point ‘knows’ that the input image was of the letter A and gives ‘A’ as the output.)