Electrosmith 3340 VCO, Build Manual

Page 1: ...Electrosmith 3340 VCO MU Build Guide 1 ...

Page 2: ...s Overview of the included parts 3 Build 4 Build 5 1 Power Header 6 2 Link Headers 10 3 Submodule 15 4 Jacks and Pots 21 Finish 27 Test 30 Calibrate 31 V OCT Trim 31 HF Trim 31 Symmetry Trim 32 Shape Trim 32 2 ...

Page 3: ...odule x1 Electrosmith 12V PSU Submodule x1 Electrosmith 3340 VCO 1MU Top PCB x1 Electrosmith 3340 VCO 1MU Bottom PCB x1 Electrosmith 3340 VCO Front Panel x2 2x8 Male Headers x1 1x6 MU Power Header x2 1x10 Female Headers x2 1x10 Male Headers x2 1x4 Female Headers x2 1x4 Male Headers x5 Knobs 3 ...

Page 4: ...Build 4 ...

Page 5: ...Build 5 ...

Page 6: ...1 Power Header 6 ...

Page 7: ...ns should be visible on the back of the PCB Make sure the plastic lock tab is facing down The side of the PCB with the text 5U POWER is the bottom side of the PCB The holes for the power header are offset slightly in both positions so that once inserted the power header will stay in position while you solder it 7 ...

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Page 9: ...Once soldered clip the pin labeled K from the power header 9 ...

Page 10: ...2 Link Headers 10 ...

Page 11: ...opulate both PCBs with the 2x8 male headers The short pins should be pointing through to the top side of the PCB while the plastic and longer side of the pins should be visible on the back of the PCB 11 ...

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Page 13: ...All of the connections that need to be soldered are highlighted with white circles to visually assist in the build process 13 ...

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Page 15: ...3 Submodule 15 ...

Page 16: ...Connect the female and male headers together 16 ...

Page 17: ...With the board face down insert the female headers into the 1MU PCB 17 ...

Page 18: ...lectrosmith 3340 submodule and 12V PSU submodule with pin 1 indicated by a square pad aligned with the marker on the 1MU PCB The trim pots and logos should be pointing up Solder the submodules onto the headers 18 ...

Page 19: ...Flip the module over leaning the now connected submodule against a surface that will keep all of the headers flush with the 1MU PCB Solder the female headers into the 1MU PCB 19 ...

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Page 21: ...4 Jacks and Pots 21 ...

Page 22: ...Populate the PCB with the 5 10k Potentiometers They should be seated onto the top side of the PCB easily verified by the boxes indicating the M 10K B pots 22 ...

Page 23: ...Populate the additional PCB with the 10 MU Jacks They should be seated onto the top side of the PCB easily verified by box shapes around where the jacks will be placed 23 ...

Page 24: ...Install the front panel so that all of the jacks and pots fit into their holes 24 ...

Page 25: ...Flip the module over and place the front panel on two objects of equal height to ensure that gravity is holding the PCB against the jacks 25 ...

Page 26: ...ide of the PCB all of the connections that need to be soldered are highlighted with white circles to visually assist in the build process In total there will be 55 solder joints to hit on the bottom side of the PCB 26 ...

Page 27: ... to the jacks and pots using the included hex nuts Once you ve tightened them you can attach the knobs to the potentiometers by matching the cutout on the bottom of the knob with the position of the pot shaft and pressing down 27 ...

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Page 29: ...Attach the link cable aligning the red stripe to the white indicator on both pcb s You re done Enjoy 29 ...

Page 30: ...nob PWM should change the sound of the square wave by adjusting the pulse width Plugging another oscillator ramp or square wave into Sync should change the sound by resetting the phase on the edges of the incoming signal Adjusting the Soft Hard toggle should change the way Sync sounds Plugging a moving signal into LFM and adjusting the LIN FM knob should change the frequency of the tone Plugging a...

Page 31: ...This can also be a musical note if a chromatic or stroboscopic tuner is being used 2 Apply 1V to V oct input 3 Adjust trimmer to 2x the initial frequency 4 Apply 0V to V oct input 5 Readjust tuning to match initial frequency 6 Repeat steps 1 5 until 1V is 2x the original frequency 7 Repeat steps 1 6 for each subsequent octave until the first 6 8 octaves are calibrated or until satisfied with the r...

Page 32: ... curve on the bottom of the waveform If you do not have an oscilloscope to view the signal you can compare the sound to a digital sine wave and try to adjust these two trimmers to match that sound Shape Trim This adjusts the overall amount of shaping being applied This affects both the top and bottom of the waveform simultaneously At its extremes you will end up pointy like a triangle wave or some...