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<p><font face="Times New Roman, Times, serif">Rotary encoders: Only
one needed (usable)? Scanning a row of encoders would be
meaningless as the will only have the current bit.</font></p>
<p><font face="Times New Roman, Times, serif">CV Pots: 16 good pots
cost far more than one encoder. From description you would
almost need 10 turn pots.</font></p>
<p><font face="Times New Roman, Times, serif">Development time: Pots
- quick, uP based encoder and associated software - lengthy.</font></p>
<p><font face="Times New Roman, Times, serif">I've been playing with
MSP430 processors for a few years. Learning curve has been
interesting. MSP430 chips are available through hole. Costs are
low. Latest development kit is $9.99 plus shipping from TI,
about $12 from Mouser:</font></p>
<p><font face="Times New Roman, Times, serif">Stopped to look it up:</font></p>
<p><font face="Times New Roman, Times, serif">MSP-EXP430G2ET -
$11.76<span id="spnManufacturerPartNumber"><br>
</span></font></p>
<p><font face="Times New Roman, Times, serif"><span
id="spnManufacturerPartNumber">MSP430G2231IN14 - $1.82 (my 14
pin goto)</span></font><span id="spnManufacturerPartNumber"><font
face="Times New Roman, Times, serif"><br>
</font></span></p>
<p><span id="spnManufacturerPartNumber"><font face="Times New Roman,
Times, serif">MSP430G2553IN20 - $2.69 (my 20 pin goto)</font></span></p>
<div><span id="spnManufacturerPartNumber"><font face="Times New
Roman, Times, serif">Development Software - free</font><br>
</span></div>
<div><br>
</div>
<div>I'm sure there are other processors that can be used, I just
never started with them (PIC, Ardino).</div>
<div><br>
</div>
<div>Meanwhile I've built an 8 step with a 4 step multiplexer with
CMOS chips. While an 8 step with the MSP430 is still on the dream
sheet.</div>
<div><br>
</div>
<div>Tim Daugard<br>
<span id="spnManufacturerPartNumber"></span></div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">On 7/23/2020 7:07 PM, Jean-Pierre
Desrochers wrote:<br>
</div>
<blockquote type="cite"
cite="mid:001401d6614e$7c9e70b0$75db5210$@oricom.ca">
<pre class="moz-quote-pre" wrap="">I'm starting to think about my next DOTCOM analog module:
a 16 steps sequencer (maybe 32 steps).
So far I'd have 2 choices for the final number of steps CV adjustments.
- Standard CV pots sequenced with gates
pros: cost is cheap, the note value is physicaly kept by each pots
cons: bad note precision on large span (I'd like a 61 notes span on each
CV adj),
span must be kept not too large..
- Rotary encoders
pros: Very large CV span can be achieved on each steps (beyond 61 notes),
quantization easy to be achieved on each steps adjustments.
cons: expensive (are they all ?), need for data memory to keep every note
values (micro-processor needed)
</pre>
</blockquote>
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