Elby Designs ASM321 Instructions d'utilisation
ASM321 Basic VCO
ELBY Designs - Laurie Biddulph
9 Follan Close, Kariong, NSW 2250, Australia
[email protected] http://www.elby-designs.com
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ASM321 Basic VCO
Construction Guide
Revision 1.6
March 15th, 2016
ASM321 Basic VCO
ELBY Designs - Laurie Biddulph
9 Follan Close, Kariong, NSW 2250, Australia
[email protected] http://www.elby-designs.com
2 of 3
Construction of the ASM321 requires the assembly of 4 boards:-
Column 1 - Panther Support 5 PCB (3D Model)
Column 2 - Panther Support 5 PCB (3D Model)
Column 3 - Panther Support 5 PCB (3D Model)
Backboard - ASM321 PCB (3D Model)
Constructors should refer to the PCB Overlay for
any specific comments regarding the board
assemblies, the Bill of Materials for the current
value of all components and General Construction
Notes for general PCB assembly guidelines. You
are advised to check all of these documents on our
website to ensure you have the latest copy.
1. Assemble all 8x Carrier Board assemblies
(3D Model)
2. Build the ASM-VCO Core assembly as per
these build notes
3. Fit all components to the boards following
normal assembly guidelines except for all
the jack sub-assemblies
4. Mount the 3x jack sub-assemblies to the
Column 1 board and then offer the
assembly up to the front panel and secure
the using the supplied nuts and washers
5. Solder the jack sub-assemblies in to place
6. Mount the 2x jack sub-assemblies to the
Column 2 board and then offer the
assembly up to the front panel and secure
using the supplied nuts and washers
7. Solder the jack-sub-assemblies in to place
8. Mount the 3x jack sub-assemblies to the
Column 3 board and then offer the
assembly up to the front panel and secure the using the supplied nuts and washers
9. Install the Backboard ensuring the correct alignment of the IDC connectors
ASM321 Basic VCO
ELBY Designs - Laurie Biddulph
9 Follan Close, Kariong, NSW 2250, Australia
[email protected] http://www.elby-designs.com
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Calibration
Initially you need to calibrate the ASM VCO Core board and should follow the instructions in the ASM VCO
Core build notes.
The remaining calibration process is for setting the wave shaper outputs:-
SAWTOOTH Output
1. Monitor the [SAWTOOTH] output
2. Set the [COARSE] and [FINE] controls so that the output is running at around 100Hz
3. Adjust P201 until the waveform is centred around 0V
TRIANGLE Output
1. Monitor the [TRIANGLE] output
2. Adjust P303 until the output is about 4V pk-pk
3. Adjust P301 for optimum waveshape
4. Adjust P302 until the waveform is centred around 0V
5. Adjust P303 until the output is about 5V pk-pk
6. Repeat steps (3) to (5) for best triangle wave shape
SINE Output
1. Monitor the [SINE] output
2. Adjust P306 until the output is about 4V pk-pk
3. Adjust P305 for optimum symmetry
4. Adjust P304 for optimum waveshape
5. Adjust P306 until the output is 5V pk-pk
6. Repeat steps (3) to (5) for best sine wave shape
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