Wanna see my process going all the way from writing and recording to mixing and mastering an entire song? Check out my Song Creation Walkthrough: http://songcreationwalkthrough.com
So, this is one of my favorite techniques for making drone sounds with my guitar. It's really simple, and it doesn't even require a ton of pedals. The only ones I used were a Diamond Compressor, Strymon El Capistan, and a Strymon Blue Sky reverb.
Like I said in the video, the real key to this sound is the right hand technique combined with a reverb pedal that allows you to go 100% wet with your signal. The Blue Sky does, but the Neunaber Stereo Wet does not (for example). So if this is something you're wanting to try/do, make sure that your reverb pedal has this capability.
I'm playing a parts Telecaster into a Matchless Clubman. My pedalboard consists of the following:
Diamond Compressor
Boss TU-3
EHX Micro POG
Xotic BB Preamp
Walrus Audio Mayflower
Fulltone Supatrem
Goodrich L-120
MXR Carbon Copy
EHX Deluxe Memory Man w/ Tap Tempo
Strymon El Capistan
Strymon Timeline
Neunaber Stereo Wet reverb
Strymon BlueSky
Everything is on a Pedaltrain PT-3 and is powered by two Voodoo Labs PP2+ power supplies.
All I used to record was a Shure SM57 on the amp, into a Focusrite Liquid Saffire 56, into Logic Pro. Video was recorded with a Nikon D5100 and edited in Final Cut Pro.
