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<div class="moz-cite-prefix">Many years ago I designed a pcb with a
lot of 4066 to control the keyboard of my Korg MonoPoly - only to
find out in the end, that I had inverted the order of the switch
contacts of one side of the matrix. Playing a chromatic scale
ended in g,f#,f,e,d#,d,c#,c,e,d#,d,c#,c,b,a#,a,g#,...<br>
<br>
<br>
Am 10.07.23 um 02:09 schrieb Guy Taylor via Synth-diy:<br>
</div>
<blockquote type="cite"
cite="mid:CAMTbUpqasGi1_8DmSZE8DBMdA0s-ajpM7viDuGGzbc7fF5-SLA@mail.gmail.com">
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<div dir="ltr"><a
href="https://electronics.stackexchange.com/questions/376966/replacing-a-switch-matrix-with-diodes-with-a-analog-crosspoint-8x8-switch/376973#376973"
moz-do-not-send="true" class="moz-txt-link-freetext">https://electronics.stackexchange.com/questions/376966/replacing-a-switch-matrix-with-diodes-with-a-analog-crosspoint-8x8-switch/376973#376973</a><br>
<br>
<br>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, Jul 10, 2023 at
10:09 AM Guy Taylor <<a href="mailto:geekon@gmail.com"
moz-do-not-send="true" class="moz-txt-link-freetext">geekon@gmail.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">Hi Benjamin,
<div>Here are docs about the 930 and 931. Sadly nothing on
the 936. </div>
<div>I assume though the matrix scanning was probably done
in a similar way, so might be of some help<br>
<br>
<a
href="https://app.box.com/folder/31685718924?s=qux1xx8ct2dmr53koo9zig651spy7ef1"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://app.box.com/folder/31685718924?s=qux1xx8ct2dmr53koo9zig651spy7ef1</a><br>
</div>
<div><br>
</div>
<div>I was going to do a similar thing, and asked about on
the stack overflow, there were some suggestions on how to
do it from Arduino:</div>
<div><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, Jul 10, 2023 at
10:01 AM Benjamin Tremblay via Synth-diy <<a
href="mailto:synth-diy@synth-diy.org" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">synth-diy@synth-diy.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div dir="auto">Several Asian warehouses claim to have
uPD936CT mcus, but nobody knew how it work. All I care
is being able to scan the matrix with some kind of
Arduino. I’ll get it done.<br>
<br>
<div dir="ltr">Benjamin Tremblay</div>
<div dir="ltr"><br>
<blockquote type="cite">On Jul 9, 2023, at 7:41 PM,
Peter Pearson via Synth-diy <<a
href="mailto:synth-diy@synth-diy.org"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">synth-diy@synth-diy.org</a>>
wrote:<br>
<br>
</blockquote>
</div>
<blockquote type="cite">
<div dir="ltr">
<div dir="ltr">I think that would've been a slider
ruler with a lighter attached but yeah, strong
agreement here.</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sun, Jul 9,
2023 at 7:31 PM Adam (synthDIY) <<a
href="mailto:synthdiy@adambaby.com"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">synthdiy@adambaby.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px
0px 0px 0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div>Wow!
<div>NASA could have really used these back in
1969...</div>
<div><br>
</div>
<div>
<div><GPN-2000-001313.jpeg></div>
<br>
<div><br>
<blockquote type="cite">
<div>On 10 Jul 2023, at 9:13 am, Peter
Pearson <<a
href="mailto:electrocontinuo@gmail.com"
target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">electrocontinuo@gmail.com</a>>
wrote:</div>
<br>
<div>
<div dir="ltr">On the Casio end of
things, does anyone have a schematic
for the Casio QL-10 Calculighter?
<div><br>
</div>
<div><a
href="https://www.calculator.org/calculators/Casio_QL-10.html"
target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">https://www.calculator.org/calculators/Casio_QL-10.html</a><br>
</div>
<div><br>
</div>
<div>Saw something about it in a
recent "Bad Gear" (no such thing)
youtube video. I want one...</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On
Sun, Jul 9, 2023 at 6:50 PM Adam
(synthDIY) <<a
href="mailto:synthdiy@adambaby.com"
target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">synthdiy@adambaby.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div>Robin Whittle did a lot of
investigating in the 1980s with
a related chip found in Casios.
Some of this may be of help.
<div><br>
</div>
<div>
<div style="display:block">
<div
style="display:inline-block"
role="link"><a
style="border-radius:10px;font-family:-apple-system,Helvetica,Arial,sans-serif;display:block;width:228px;overflow:hidden;text-decoration:none"
rel="nofollow"
href="https://www.firstpr.com.au/rwi/casio/Casio-931-2006-06-17.txt"
dir="ltr" role="button"
width="228"
target="_blank"
moz-do-not-send="true">
<table
style="table-layout:fixed;border-collapse:collapse;width:228px;background-color:rgb(229,230,233);font-family:-apple-system,Helvetica,Arial,sans-serif"
width="228"
cellspacing="0"
cellpadding="0"
border="0">
<tbody>
<tr>
<td align="center"><span
id="m_-2366083547433593715m_-4514269672798014341m_-1806982447355216464cid:1893cecbc79b2f85b031"><preview.png></span></td>
</tr>
<tr>
<td>
<table
style="font-family:-apple-system,Helvetica,Arial,sans-serif;table-layout:fixed;background-color:rgb(229,230,233)"
width="228"
cellspacing="0"
cellpadding="0" bgcolor="#E5E6E9">
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<td
style="padding:8px
0px">
<div
style="max-width:100%;margin:0px
16px;overflow:hidden">
<div
style="font-weight:500;font-size:12px;overflow:hidden;text-overflow:ellipsis;text-align:left"><a
rel="nofollow"
href="https://www.firstpr.com.au/rwi/casio/Casio-931-2006-06-17.txt"
style="text-decoration:none"
target="_blank" moz-do-not-send="true"><font color="#272727">Casio-931-2006-06-17</font></a></div>
<div
style="font-weight:400;font-size:11px;overflow:hidden;text-overflow:ellipsis;text-align:left"><a
rel="nofollow"
href="https://www.firstpr.com.au/rwi/casio/Casio-931-2006-06-17.txt"
style="text-decoration:none"
target="_blank" moz-do-not-send="true"><font color="#808080">Text
Document · 90
KB</font></a></div>
</div>
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</a></div>
</div>
<div style="display:block"><br>
</div>
<div style="display:block"><br>
</div>
<div style="display:block">and
some background here</div>
<div style="display:block">
<div style="display:block">
<div
style="display:inline-block"
role="link"><a
style="border-radius:10px;font-family:-apple-system,Helvetica,Arial,sans-serif;display:block;width:300px;overflow:hidden;text-decoration:none"
rel="nofollow"
href="https://www.firstpr.com.au/rwi/casio/"
dir="ltr"
role="button"
width="300"
target="_blank"
moz-do-not-send="true">
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style="table-layout:fixed;border-collapse:collapse;width:300px;background-color:rgb(229,230,233);font-family:-apple-system,Helvetica,Arial,sans-serif"
width="300"
cellspacing="0"
cellpadding="0"
border="0">
<tbody>
<tr>
<td>
<table
style="font-family:-apple-system,Helvetica,Arial,sans-serif;table-layout:fixed;background-color:rgb(229,230,233)"
width="300"
cellspacing="0"
cellpadding="0" bgcolor="#E5E6E9">
<tbody>
<tr>
<td
style="padding:8px
0px">
<div
style="max-width:100%;margin:0px
16px;overflow:hidden">
<div
style="font-weight:500;font-size:12px;overflow:hidden;text-overflow:ellipsis;text-align:left"><a
rel="nofollow"
href="https://www.firstpr.com.au/rwi/casio/"
style="text-decoration:none"
target="_blank" moz-do-not-send="true"><font color="#272727">Modifications
to Casio
musical
instruments
from the 1980s</font></a></div>
<div
style="font-weight:400;font-size:11px;overflow:hidden;text-overflow:ellipsis;text-align:left"><a
rel="nofollow"
href="https://www.firstpr.com.au/rwi/casio/"
style="text-decoration:none"
target="_blank" moz-do-not-send="true"><font color="#808080">firstpr.com.au</font></a></div>
</div>
</td>
<td
style="padding:0px
12px 0px 0px"
width="36"><a
rel="nofollow"
href="https://www.firstpr.com.au/rwi/casio/" target="_blank"
moz-do-not-send="true"><img
style="display: inline-block; width: 36px; height: 36px;"
moz-do-not-send="true"
width="36"
height="36"></a></td>
</tr>
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</table>
</a></div>
</div>
<br>
</div>
<div><br>
</div>
<div><br>
</div>
A</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
<div><br>
<blockquote type="cite">
<div>On 10 Jul 2023, at
4:51 am, Benjamin
Tremblay via Synth-diy
<<a
href="mailto:synth-diy@synth-diy.org"
target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">synth-diy@synth-diy.org</a>> wrote:</div>
<br>
<div>
<div>I cannot find any
pinouts for this chip.
<br>
I pulled if off the
board (very carefully
for me). Now I am
trying to guess which
io pins scanned the
keys and switches. <br>
I can’t find a pinout
for this chip
anywhere. Octopart
denies its existence.
<br>
Not the same chip as
the Casio VL and PT
series monophonic
keyboards, but
hopefully somebody got
a bonus for cramming
the VL-10
functionality into
this 28 pin DIP.<br>
<br>
Ben<br>
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