Electronics > Projects, Designs, and Technical Stuff
OSH Audio THD instrument and live BOM
asgard:
I am working on a project that was inspired from an article in NutsVolts this month. It is a respin of an Audio-Range THD instrument that uses modular construction and is a more-or-less complete THD measuring device. I am including here the PDF's of all three of the main assemblies and the "live" BOM spreadsheet. The main point here is not precisely the project as such, but I wanted to contribute how I express a complex bill of materials statement for a multiple-assembly project that people here might use and get ideas about how to set up their own projects. This one has seven worksheets in the Excel document, one for each of the three oscillators, three notch filters, and the main board. I think the likely coolest thing here is the automatic selection of the price-break costing for each part based on the number of units to be produced.
J.R. Stoner
Aztlanpz:
I am working on the same thing, but I am using Altium.
asgard:
Not sure of the point of that. The drawings, while prepared with a particular CAD tool, was only incidental to the main purpose, which was to give out a way to do BOM's.
moffy:
What is your expected performance? i.e. 0.01% or 0.001% etc
cat87:
The yhing to warch out for would be the oscillator's own THD. You need it to have at least -80 or -90dB THD to be9f any real use. Because that will ultimately dictate the performance of the whole set-up.
Have you built that oscillator yet ?
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