On Wednesday 09 June 2010, Peter Nijs wrote: > On Wednesday 09 June 2010 15:20:51 Paul Fertser wrote: > > Peter Nijs <[email protected]> writes: > > > find it quite difficult to difficult to find the needed components: 2K2 > > > 0402 smd resistor and a small ceramic 100µF smd cap. > > > > It'd be a bit too long for me to send you the parts but i can suggest > > using 0603 R (it fits there all right because one side of it should be > > connected to the ground plane anyway.) and a tantalum capacitor, those > > are much easier to source. > > > > HTH > > Thanks for the tips. I already found them on rs-components (and I have > contacts who can order there). But aren't tantalum cap's polarised? Or is > the mic signal DC? Or is there another reason why this isn't a problem?
The cap is smoothing the mic bias supply, and polarised caps are regularly used for this purpose. You just have to make sure you put them the right way round ;-) In this case the mic bias is +ve. _______________________________________________ Openmoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community
