Weston Precision Audio 2VL1 Manual Download | Manualshive

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© 2019 Weston Precision Audio

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2VL1

Dual VCO + LFO

DIY Eurorack Module

Weston Precision Audio

Designed In Portland, Oregon

Revision 01 - July 16 2019

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Summary of Contents for 2VL1

Page 1: ...2019 Weston Precision Audio 1 2VL1 Dual VCO LFO DIY Eurorack Module Weston Precision Audio Designed In Portland Oregon Revision 01 July 16 2019...

Page 2: ...outputs Pulse Saw LFO outputs Triangle Square VCO1 2 inputs 1 Volts Octave Pulse Width Modulation Linear Frequency Modulation VCO 2 will default to using the VCO 1 Volts oct input until a jack is inst...

Page 3: ...B M3 Hex Standoff 4mm x 12mm L Typ Phillips Machine Screw M3 x 6mmL Typ Front Panel Davies Clone Knobs See build instructions for color requirements Round Nuts For Thonkiconn 3 5mm Jacks Typ Potentiom...

Page 4: ...R14 R19 2 5 1K Resistor_THT R_Axial_DIN0207_L6 3mm_D2 5mm_P7 62mm_Horizontal R15 R17 2 8 45K Resistor_THT R_Axial_DIN0207_L6 3mm_D2 5mm_P7 62mm_Horizontal R18 R21 2 33K Resistor_THT R_Axial_DIN0207_L...

Page 5: ...7 5K Resistor_THT R_Axial_DIN0207_L6 3mm_D2 5mm_P7 62mm_Horizontal R51 1 37 4K Resistor_THT R_Axial_DIN0207_L6 3mm_D2 5mm_P7 62mm_Horizontal R52 R53 2 150K Resistor_THT R_Axial_DIN0207_L6 3mm_D2 5mm_...

Page 6: ...Thonkiconn Mono Jack J23 1 PLS2 OUT Jacks Thonkiconn Mono Jack J24 1 LFO TRI OUT Jacks Thonkiconn Mono Jack J25 1 LFO SQ OUT Jacks Thonkiconn Mono Jack J3 1 PINHEADER IO3 Connector_PinHeader_2 54mm P...

Page 7: ...ed about zero minimize DC offset value 3 Monitor VCO1 saw output with your O scope and adjust SAW1 SHAPE trim pot to connect the halves of the saw 4 Monitor LFO triangle output with your DMM or O scop...

Page 8: ...e transistor circuit and 150uF cap on PCB C help mitigate these ripples to a great degree but it s still best to avoid high current LEDs as well Belt and suspenders Finally install the knobs The pictu...

Page 9: ...REF PCB Pics Finished 2019 Weston Precision Audio 9...

Page 10: ...7 8 U5D LM13700 SYNC PULSE GENERATOR C3 0 01u 12V GND 12V C4 0 01u GND 11 10 U4E 40106 13 12 U4F 40106 R33 75K R32 47K R31 47K 1 2 3 TP5 100K LFO TRI OFFSET TRIM 12V R34 1K R35 20K C14 2 2u Film GND...

Page 11: ...R66 100K R75 191K GND R78 1K R79 1K R55 2K R63 2M R71 3K R73 2 2K GND PLS2 COMPARATOR R53 150K GND R49 402K R50 100K SAW2 SHAPE TRIM 1 2 3 TP10 100K 12V TRI2 OFFSET TRIM SQ2RAW TRI2RAW SAW2 TRI2 PULS...

Page 12: ...ND C28 0 47u 1 2 3 J17 FM2 IN GND 1 2 3 J13 VCO2 V OCT IN R84 100K GND 1 2 3 RV3 100K LIN 12V 12V VCO2 COARSE R85 164K 1 2 3 RV4 100K LIN 12V 12V VCO2 FINE R86 3 9M 1 2 3 4 SW1 SYNC SOURCE GND R89 10K...

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