Here is a better DIY link:
http://sparkbangbuzz.com/memristor/memristor.htm
And here's a where I did asked previous questions on the topic: https://electronics.stackexchange.com/questions/76097/what-a...
And here's a where I did asked previous questions on the topic: https://electronics.stackexchange.com/questions/76097/what-a...
https://makezine.com/2011/11/03/how-to-homemade-memristor/