I really enjoyed @neavvy's tutorial about Neural Networks. He discussed the concept of perceptron - a computational representation of single neuron. He also presented some examples to show how perceptron makes a decision and learns itself.
Here is a link: https://steemit.com/utopian-io/@neavvy/teaching-ai-to-play-flappy-bird-the-concept-of-perceptron-or-neural-networks-1