Electrical Symbol Alphas - Marcus Johnston

These are 40 alphas I made of electrical symbols for a project of mine, I thought I'd share them so anyone can use them in their projects. Inside there are 40 grayscale 1024*1024 .psd files, Zbrush ready. I'm unsure if anything like this already exists, but I thought I'd share it nonetheless. 

And no I have no idea what most of them mean!