Lithium Grim Cave Vibe Building Instructions

All trademarks held by Earthquaker Devices. Manufacturer and product names are mentioned solely for circuit identification, and where applicable their trademarks are the property of their respective owners who are in no way associated or affiliated with the author. No cooperation or endorsement is implied. 2 Table of contents Components ............................................................................................................................................ 3 PCB layout ............................................................................................................................................... 4 Bill of Materials........................................................................................................................................ 4 Introduction ............................................................................................................................................. 6 Building sequence ................................................................................................................................... 6 Off board wiring ...................................................................................................................................... 7 Testing and mods .................................................................................................................................... 9 Troubleshooting .................................................................................................................................... 10 Known problem LFO .......................................................................................................................... 10 Schematic .............................................................................................................................................. 11 Read this entire manual thoroughly before you start building the effect! Last update: 16-03-2019

All trademarks held by Earthquaker Devices. Manufacturer and product names are mentioned solely for circuit identification, and where applicable their trademarks are the property of their respective owners who are in no way associated or affiliated with the author. No cooperation or endorsement is implied. 3 Components Name Value Comment Name Value Comment C1 100n SMF P1 B25k Throb C2 15n SMF P2 A100k Level C3 220n SMF P3 B100k Dual Rate C4 100p Ceramic P4 B25k Intensity C5 4n7 SMF P5 B10k Voice C6 470p Ceramic R1 1M 1% metal film C7 1u Electrolyte R2 1M 1% metal film C8 1u Electrolyte R3 47k 1% metal film C9 100n SMF R4 47k 1% metal film C10 47u Electrolyte R5 22k 1% metal film C11 10u Electrolyte R6 47k 1% metal film C12 10u Electrolyte R7 47k 1% metal film C13 100u Electrolyte R8 47k 1% metal film C14 10u Electrolyte R9 47k 1% metal film C15 1u Electrolyte R10 47k 1% metal film C16 1u Electrolyte R11 100k 1% metal film C17 1u Electrolyte R12 100k 1% metal film C18 47u Electrolyte R13 10k 1% metal film C19 47u Electrolyte R14 56k 1% metal film D1 1N4001 R15 10k 1% metal film D2 1N5817 R16 10k 1% metal film D3 1N5817 R17 3k3 1% metal film D4 LED Transparent green R18 220k 1% metal film IC1 TL072 R19 220k 1% metal film IC2 TL074 R20 3k3 1% metal film IC3 LT1054 R21 2M2 1% metal film LDR1 GL-5539 alternative GL-5549 R22 15k 1% metal film LDR2 GL-5539 alternative GL-5549 R23 4k7 1% metal film LDR3 GL-5539 alternative GL-5549 R24 100k 1% metal film LDR4 GL-5539 alternative GL-5549 R25 100R 1% metal film Q1 MPSA18 R26 47k 1% metal film Q2 MPSA18 SW1 SPDT Voltage Select All components must be rated for 25V or higher! A=Log, B=Lin, C=Rev. Log

All trademarks held by Earthquaker Devices. Manufacturer and product names are mentioned solely for circuit identification, and where applicable their trademarks are the property of their respective owners who are in no way associated or affiliated with the author. No cooperation or endorsement is implied. 4 50 mm x 75 mm 1.97 in x 2.95 in PCB layout

All trademarks held by Earthquaker Devices. Manufacturer and product names are mentioned solely for circuit identification, and where applicable their trademarks are the property of their respective owners who are in no way associated or affiliated with the author. No cooperation or endorsement is implied. 5 Bill of Materials Capacitors Resistors (1% metal film) Component pcs. Type Rating Component pcs. Value pcs. 100p 1 Ceramic 25V+ GL-5539 4 47k 8 470p 1 Ceramic 25V+ 100R 1 56k 1 4n7 1 MKT 25V+ 3k3 3 100k 3 15n 1 SMF 25V+ 4k7 1 220k 2 100n 2 SMF 25V+ 10k 3 1M 2 220n 1 SMF 25V+ 15k 1 2M2 1 1u 5 Electrolyte 25V+ 22k 1 10u 3 Electrolyte 25V+ 47u 3 Electrolyte 25V+ Potentiometers (Alpha 16mm) 100u 1 Electrolyte 25V+ Component pcs. Value pcs. B10k 1 B100k Dual 1 Diode Transistors B25k 2 Component pcs. Component pcs. A100k 1 LED Green 5mm 1 MPSA18 2 LED 5mm 1 1N4001 1 Note: 1N5817 2 Voltage selection switch SW1 can be any type of SPDT switch IC Component pcs. Type pcs. TL072 1 LT1054 1 TL074 1