Now that I have all components available, I was able to build up the three VCOs, attaching the small boards with the according connectors to the main board:

Main Board, VCO 1, 2 and 3 with Small VCO Boards Mounted20150411_165408_5234c
Main Board, VCO 1, 2 and 3 with Small VCO Boards Mounted
Component side, jacks, switches and sliders still missing.
Main Board, VCO 1, 2 and 3 with Small VCO Boards Mounted

Main Board, VCO 1, 2 and 3 Completed20150411_140115_5228c
Main Board, VCO 1, 2 and 3 Completed
Back side, jacks, switches and sliders still missing.
Main Board, VCO 1, 2 and 3 Completed

Meanwhile I had also finished the VCF part. As you can see I'm not using the built-in power unit, but will be using my own external power supply:

Main Board, VCF Completed20150411_135922_5227c
Main Board, VCF Completed
Component side, jacks and sliders still missing.
Main Board, VCF Completed

Main Board, VCF Completed20150411_140210_5229c
Main Board, VCF Completed
Back side, jacks and sliders still missing.
Main Board, VCF Completed

With those parts done, I could do some first test. I've connected the main board to my power supply and connected things to my oscilloscope:

Mainboard VCOs and VCF Testing20150411_181733_5235c
Mainboard VCOs and VCF Testing
Mainboard VCOs and VCF Testing

Happily all seems fine so far. The correct waveforms are visible for the three VCOs and also at the output of the VCF. In the following images the upper yellow waveform is the VCO output and the lower blue waveform is the same signal passed through the VCF.

VCO 1, square waveform:

Testing VCO1 Square Signal and VCF Output20150411_VCO1square_VCF
Testing VCO1 Square Signal and VCF Output
Testing VCO1 Square Signal and VCF Output

VCO 2, triangle waveform:

Testing VCO2 Triangle Signal and VCF Output20150411_VCO2triangle_VCF
Testing VCO2 Triangle Signal and VCF Output
Testing VCO2 Triangle Signal and VCF Output

VCO 3, saw waveform:

Testing VCO3 Saw Signal and VCF Output20150411_VCO3saw_VCF
Testing VCO3 Saw Signal and VCF Output
Testing VCO3 Saw Signal and VCF Output

So far thus no soldering errors, all seems to be working as it should.


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