thanks bela_robert for the BOM, will place an order .
(also the instructions look excellent, thanks for putting so much effort into this!)
glad your enjoying the series ... hoping next one will be with Trill
going to order some more grove to grove cables at same time as ordering above BOM
odd thing...
Ive noticed (rev 1 pepper) has a DC offset e.g. the sine example, is about 3v peak to peak (as expected) but its centred around 1.5v (approx)
is this correct? i don't remember noticing it before?
Im going to test my other pepper which is in a different rack, but I need to hook up my scope to do this.
as I say odd... as Id have thought I would have noticed this before...
EDIT:
ok, so my other pepper is the same, and given its in a completely different rack, and Im measuring it with a different scope - I'll assume this is 'normal' - or I did the same thing wrong in both builds 😉
I think the reason Ive only just noticed is I was using a VCA to amplify, and the DC offset makes this distort and cut out when pushed too far... I think previously i was using an input module, which possibly removed the DC offset without me noticing (that'd mean I also would see on scope!)
I assume the above amp remove this DC offset? (its aim being to -5v to +5v centred on 0v)
is R49/R55 the biasing? i.e. if it wasn't exactly centred replacing with a trim pot might allow adjustment.
(but perhaps its not that relevant, a small DC offset is ok)