SV: [sdiy] More on LVDT for keyboards...

[karl dalen]

Forget all those special LVDT decoder chips, they cost a fortune,
you can implement a very effective multiplexed quadrature LVDT decoder
in any decent 8bitter MCU. Use one PWM as generator, AD or 2 Compare
channels as decoder. :-)

Well, there are a dirt cheap cap sensor chip like CS209. (On semi)

Reg
KD

 
--- Jim Patchell <patchell at cox.net> skrev:

> In doing research...turns out there are chips for processing LVDT's that 
> address the drift problems...
> 
> http://www.analog.com/UploadedFiles/Data_Sheets/AD698.pdf
> 
> The down side...
> 
> Those chips cost ~$25 each...
> 
> But...I think I can figure out something along those lines to cut costs 
>   (DIY solution of course)...
> 
> -Jim
> 
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> 



      ___________________________________________________
Sök efter kärleken!
Hitta din tvillingsjäl på Yahoo! Dejting: http://ad.doubleclick.net/clk;185753627;24584539;x?http://se.meetic.yahoo.net/index.php?mtcmk=148783