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Parts count<br>
economy of scale (mass production)<br>
Features<br>
<br>
I'm not saying anything good or bad about the price of a URI type
device.<br>
When I built the URI clone on repeater builder, cost was about $20.<br>
<br>
73, Steve N4IRS<br>
<br>
<div class="moz-cite-prefix">On 10/13/2015 8:44 AM, Skyler F wrote:<br>
</div>
<blockquote
cite="mid:CAJNyT0-6fhw1RwXYhs=gxzB6=BKd7v1jvuducWWauQGGusEQBA@mail.gmail.com"
type="cite">
<div dir="ltr">Oh. Well thanks for the replies. I don't see how
the URI is 25 times more expensive than the sound fob.</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Tue, Oct 13, 2015 at 6:36 AM, Steve
Zingman <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:szingman@msgstor.com" target="_blank">szingman@msgstor.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> That is the Mute LED.
If you mute the CM108 there may be no audio.
<div>
<div class="h5"><br>
<br>
<div>On 10/13/2015 8:25 AM, Skyler Fennell wrote:<br>
</div>
<blockquote type="cite">
<div>To the pin with the red LED</div>
<div><br>
On Oct 13, 2015, at 6:23 AM, Steve Zingman <<a
moz-do-not-send="true"
href="mailto:szingman@msgstor.com"
target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:szingman@msgstor.com">szingman@msgstor.com</a></a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div> Where do you want to switch it to?<br>
<br>
<div>On 10/13/2015 8:08 AM, Skyler Fennell
wrote:<br>
</div>
<blockquote type="cite">
<div>Ok, I'll just solder the pin, just making
sure. </div>
<div><br>
</div>
<div>It's weird you can't switch the gpio pin
for PTT in software.</div>
<div><br>
</div>
<div>On Oct 12, 2015, at 11:54 PM, larry <<a
moz-do-not-send="true"
href="mailto:larry@n7fm.com"
target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:larry@n7fm.com">larry@n7fm.com</a></a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div>
<div>Skyler, Short answer is No!<br>
<br>
My experience with the sound fobs that
look similar to yours , You will still
need to solder to Pin 13 to get the PTT
logic. No way around that as on the
CM-108 chip Pin 13 is not connected to
anything so no place else to get that
logic other than soldering a wire to the
pin.<br>
<br>
As for the COS signal (CM-108 Pin 48)
that can be gotten from the left side of
the volume down switch SW1 if you want
to avoid soldering the COS line to Pin
48 on the sound chip. CTCSS can be
retrieved from the right side of volume
up SW2<br>
<br>
The Green LED is still the heartbeat
indicator. <br>
The Red Led on the Fob is <b>NOT</b>
the same as the PTT LED indicated on the
modification schematic.<br>
<br>
In fact if you go here <a
moz-do-not-send="true"
href="http://www.crompton.com/hamradio/usb_fob_modification/"
target="_blank"><a class="moz-txt-link-freetext" href="http://www.crompton.com/hamradio/usb_fob_modification/">http://www.crompton.com/hamradio/usb_fob_modification/</a></a><br>
<br>
You will find a good description of the
connections on that particular fob.<br>
<br>
Larry - N7FM<br>
<br>
<br>
<br>
On 10/12/2015 06:23 PM, Skyler Fennell
wrote:<br>
</div>
<blockquote type="cite">
<pre>I previously got the CM108 sound fob from startech and had to solder to the tiny pin.
With this one
<a moz-do-not-send="true" href="http://ebay.com/itm/291156304476?_mwBanner=1&varId=590306532025" target="_blank">http://ebay.com/itm/291156304476?_mwBanner=1&varId=590306532025</a>
It looks like it already has both LED's installed. I am assuming the red led is the same as the transmit LED.
If this is so, does that mean I don't have to solder to the tiny pin on the CM108 and I can just drive a transistor with the same wire as the LED for PTT?
Skyler KD0WHB
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-- <br>
<div class="gmail_signature">
<div dir="ltr"><font color="#38761d" face="arial narrow,
sans-serif">Skyler Fennell</font>
<div><font color="#38761d" face="arial narrow, sans-serif"><a
moz-do-not-send="true" href="http://amsatnet.info"
target="_blank">amsatnet.info</a></font></div>
<div><font color="#38761d" face="arial narrow, sans-serif">KDØWHB</font></div>
<div><font color="#38761d" face="arial narrow, sans-serif"><a
moz-do-not-send="true"
href="mailto:electricity440@gmail.com" target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:electricity440@gmail.com">electricity440@gmail.com</a></a></font></div>
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