The module is in a compact 10HP width, ie 2". We envision that a complete DIY VCO build should be possible for under GBP £50, including the VCO chip, PCBs and front panel. This may depend on where you source the VCO chip from.
Particular care has been taken to provide an easy build for the DIY community - I have now built five with no difficulty. All components are through-hole in a straightforward layout. No inter-wiring of panel components is needed. The trimmers afford ease of access.
I would like to thank Julian for collaborating on the front panel design and David 'mrmrshoes' for his beta testing and modification suggestions for 12v use.
Julian will be able to ship both PCBs and panels together for a saving on shipping costs. The cost of the PCB set is GBP £9 and Julian's front panel will cost GBP £20. PCB shipping will be £1.50 in the UK and £3.50 elsewhere in the world.
Kits may be offered in future, or complete builds, if people would rather have one-stop shopping or a complete plug in and go module. Please message me if this is more attractive for people and I will work out costs.
The only issue arising has been that on a 12v supply rather than 15v the raw saw wave output has an amplitude of around 7.6 volts rather than 10v. The other waveforms have been buffered and adjusted to give nearer 10v to be more faithful to the original. It would be possible to adjust the other waveforms so they matched the 7.6v, but the team's view has been to keep things as they are as waveforms will usually be attenuated further down the signal chain anyway.
Documentation
The original ETI magazine article is here ETI article
The original Digisound article is here Digisound article
