• Stage Center Reverb (by Craig Anderton): GIF ¹, PS-Zed ²

• Angry Beard 3 (overdrive; by Jamie Heilman): GIF ¹, PS-Zed ²
• Electra Power Overdrive similar circuit (by Bruce E.): GIF ¹, PS-Zed ²
• FET Muff: HTML ¹, PC Board diagram GIF ³
• Fuxx Face (by Jack A. Orman): HTML ¹
• GEU (octave fuzz; from January 1980 ETI-Canada): GIF ¹, PS-Zed ²
• Harmonic Sweetener (selected frequency band distortion): GIF ¹, PS-Zed ²
• Mod Box (by Jack A. Orman and Tom Henry): HTML ¹
• Modified Tube Sound Fuzz (by Mark Hammer; orig. Craig Anderton): GIF ³, PS-Zed ²
• MOS Doubler, MOS Octave (by R.G. Keen): GIF ³, board diagram GIF ³
• Pipe Bomb idea (by Jamie Heilman): GIF ¹, PS-Zed ²
• Rex's Fuzz (by Jack A. Orman): TXT ¹, GIF ¹
• Son of Screamer (by Jack A. Orman): HTML ¹
• Tube Distortion Pedal (from 1981 Guitar Player): GIF ¹, PS-Zed ²
• Tube Driver (drawn by Jack A. Orman): GIF ¹

• DIY Bias Probe (by R. G. Keen): GIF ³
• DMZ A/B Switchbox (by Jack A. Orman): HTML ¹
• Latching Relay Bypass Circuit with indicator (by R. G. Keen): GIF ³
• Q&D Effects Box (by Jack A. Orman): HTML ¹
• Q&D Surge Protector (by Jack A. Orman): HTML ¹
• Quad Buffer (by Jack A. Orman): HTML ¹
• Peak Power Indicator (by Jack A. Orman): HTML ¹
• Pedalboard Power Supply (by R. G. Keen): HTML ³, GIF ³
• Stereo Spreader (from June 1991 Electronic Musician; by Jules Ryckebusch): GIF ¹, PS-Zed ²
• Stomp Switch Wiring (by R. G. Keen): GIF ³
• Transformer Short Tester (by R. G. Keen): GIF ³

• A simple mixer (by R. G. Keen): GIF ¹, PS-Zed ²

• A simple tremolo: GIF ¹, PS-Zed ²

• 3 band tone circuit (from Popular Electronics): GIF ¹
• Dual Booster (by Jack A. Orman): HTML ¹
• Signal brighteners (from Music Synthesizers by Delton Horn): GIF ¹, PS-Zed ²
• Tone Booster (from Everyday Electronics): GIF ¹, PS-Zed ²
• Tone control circuits: GIF ¹, PS-Zed ²

¹ - stolen from J.A. Orman's DMZ

² - stolen from Jamie Heilman's Leper's Effects Schematics

³ - stolen from R.G.Keen's GEO