Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!comp.vuw.ac.nz!cc-server4.massey.ac.nz!G.Moretti
From: G.Moretti@massey.ac.nz (Giovanni Moretti)
Newsgroups: sci.electronics
Subject: Re: Electro-pots for Audio
Keywords: pot, audio
Message-ID: <1991Jan14.235508.3704@massey.ac.nz>
Date: 14 Jan 91 23:55:08 GMT
References: <1991Jan14.100532@sdd.hp.com>
Organization: Massey University, Palmerston North, New Zealand
Lines: 30
X-Reader: NETNEWS/PC Version 2.2

>> Re digitally controlled pots ...

Kirk

Signetics make a whole range of digitally controlled things :-) such as
volume controls, tone controls ... that are controlled via their IIC bus
(I forget what this stands for).  This is a slow (100KHz) serial bus with
one clock line and one (? two) data lines so the chips are small (lots of
8 pin DIPs), cheap and easy on board space .  They have things like dot
matrix displays with built-in decoders and keyboard encoders, 2K EEprom
(in 8 bit dip) and so on. The range filled an A4 page's worth last time I
looked.

I haven't used these (yet) - I'm waiting till I've got forth running on
an 8031 so I can do it interactively - but those I know that have
rave about the chips and the range.  Signetics use them for the insides
of their TV sets ...

I have no connection with Phillips/Signetics other than an interested
observer and pending customer :-)

Cheers
Giovanni

-- 
------------------------------------------------------------------------------
Giovanni Moretti, Consultant       | G.Moretti@massey.ac.nz, Pkt-ZL2BOI@ZL2BFJ
Computer Centre,  Massey University| Ph 64 63 69099 x8398, FAX 64 63 505607
Palmerston North, New Zealand      | QUITTERS NEVER WIN, WINNERS NEVER QUIT
------------------------------------------------------------------------------