Anybody making protein powder at home?

Has anybody tried making protein powders at home? I did find some recipes online which mostly uses some seeds and beans. I am planning to give it a try, but before that would like to know if anybody has tried it and how was the experience? Also please share your recipes.

Am planning to try this - http://livewellnetwork.com/Steven-and-Chris/episodes/DIY-Protein-Powder/9331631.