A similar circuit using the AD636 coupled with the ICL7106 A/D and LCD driver is detailed in the July 2009 audioXpress magazine.
http://www.audioxpress.com There is, however, no PCB or parts kit available and I'm not certain that the artwork for the PCB that's printed is to scale although it looks like it is. Jack -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Folderol Sent: Thursday, December 03, 2009 3:30 PM To: [email protected] Subject: [LAD] Milivoltmeter - Was FOSS Ethernet Soundcard On Wed, 2 Dec 2009 17:19:30 +0000 Folderol <[email protected]> wrote: > On Tue, 1 Dec 2009 21:46:32 +0100 (CET) > [email protected] (Karl Hammar) wrote: > > > Folderol: > > ... > > > My new millivoltmeter/dB meter is nearly finished - All I need now is > > > precision resistors 9M, 900k, 90k :? > > ... > > > > Can you publicise it so I can build me one also? > > > > Regards, > > /Karl > > It is simple enough, so as soon as I can find the time I'll draw out > the schematic and post it here as a PDF attachment. As promised, PDF attached. I haven't had time to make out any explanatory notes, but I think it's pretty straight forward anyway 0dB is variable so it can be set to whatever is convenient, hence temperature drift from using an ordinary diode as a reference is not important. -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song. _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev
