<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class=""><br class=""></div><blockquote type="cite" class=""><div dir="auto" class=""><div dir="auto" class=""> - What about extending the 12V rail all the way to the end of column 16, parallel to the ground rail?</div></div></blockquote><div class=""><br class=""></div>Would most projects require 12V? I thought 3.3v and GND would be the most useful?<div class=""><br class=""></div><div class="">We could extend the 12V, but I worry it is a little close to that GND batch.<br class=""><div class=""><br class=""></div><div class=""><blockquote type="cite" class=""><div dir="auto" class=""><div dir="auto" class=""> - Currently, all the holes are isolated. Would there be any benefit to connecting the holes in each row in groups of 3 or 4?</div></div></blockquote><div class=""><br class=""></div>I personally prefer isolated. Allows for the most flexibility. But I have seen designs with connected rows as well.</div><div class=""><br class=""></div><div class="">The current design is intended to maximise the number of holes available. Designer has said he is trying to tidy it up now, and then will make a few samples to see how it looks/fits.</div><div class=""><br class=""></div><div class="">Regards, Mark.<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 18 Apr 2019, at 11:18 AM, Brian Greenberg <<a href="mailto:grnbrg@grnbrg.org" class="">grnbrg@grnbrg.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="auto" class="">Put me down for package - I've been thinking about driving a handful of relays for various things, and have been thinking about having a small number of boards like this done - it's pretty much impossible to find a generic prototype board with 2mm pitch holes... <div dir="auto" class=""><br class=""></div><div dir="auto" class="">Although I'm no designer....</div><div dir="auto" class=""><br class=""></div><div dir="auto" class=""> - What about extending the 12V rail all the way to the end of column 16, parallel to the ground rail?</div><div dir="auto" class=""> - Currently, all the holes are isolated. Would there be any benefit to connecting the holes in each row in groups of 3 or 4?</div><div dir="auto" class=""><br class=""></div><div dir="auto" class=""><br class=""></div><div dir="auto" class="">Brian. </div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed., Apr. 17, 2019, 19:37 Mark Webb-Johnson, <<a href="mailto:mark@webb-johnson.net" class="">mark@webb-johnson.net</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word;line-break:after-white-space" class="">It seems the attachments were messed up, so attaching again…<div class=""><br class=""></div><div class="">Regards, Mark.</div><div class=""><br class=""></div><div class=""></div></div><div style="word-wrap:break-word;line-break:after-white-space" class=""><div class=""></div></div><div style="word-wrap:break-word;line-break:after-white-space" class=""><div class=""><br class=""><div class=""><br class=""><blockquote type="cite" class=""><div class="">On 17 Apr 2019, at 10:07 PM, Mark Webb-Johnson <<a href="mailto:mark@webb-johnson.net" target="_blank" rel="noreferrer" class="">mark@webb-johnson.net</a>> wrote:</div><br class="m_-8680859910901462136Apple-interchange-newline"><div class=""><div dir="auto" class=""><div dir="ltr" class=""></div><div dir="ltr" class=""><div style="font-family:微软雅黑,Verdana,"Microsoft Yahei",SimSun,sans-serif;font-size:14px;line-height:1.6" class=""><blockquote id="m_-8680859910901462136ntes-pcmail-quote" style="margin:0px;padding:0px;font-family:微软雅黑" class=""><br class=""></blockquote><blockquote id="m_-8680859910901462136ntes-pcmail-quote" style="margin:0px;padding:0px;font-family:微软雅黑" class="">Design layout. Looks good to me, but open to suggestions...</blockquote><blockquote id="m_-8680859910901462136ntes-pcmail-quote" style="margin:0px;padding:0px;font-family:微软雅黑" class=""><br class=""></blockquote><blockquote id="m_-8680859910901462136ntes-pcmail-quote" style="margin:0px;padding:0px;font-family:微软雅黑" class="">We can make in sets of three PCBs, to keep prices down.</blockquote><blockquote id="m_-8680859910901462136ntes-pcmail-quote" style="margin:0px;padding:0px;font-family:微软雅黑" class=""><br class=""></blockquote><blockquote id="m_-8680859910901462136ntes-pcmail-quote" style="margin:0px;padding:0px;font-family:微软雅黑" class="">Regards, Mark<br class=""><br class=""></blockquote></div><u class=""></u><u class=""></u><u class=""></u><u class=""></u></div><div dir="ltr" class=""><br class="">On 8 Apr 2019, at 12:05 PM, Mark Webb-Johnson <<a href="mailto:mark@webb-johnson.net" target="_blank" rel="noreferrer" class="">mark@webb-johnson.net</a>> wrote:<br class=""><br class=""></div><blockquote type="cite" class=""><div dir="ltr" class=""><div class=""><br class=""></div>A kit of 5 PCBs + SIP edge connectors + mounting hardware, unsoldered, would be about US$15 + shipping. About US$3/board set. With shipping I don’t think this is worth doing with less than 3 or 5 boards per kit.<div class=""><br class=""></div><div class="">Would this be useful?</div><div class=""><br class=""></div><div class="">Regards, Mark.<br class=""><div class=""><br class=""><blockquote type="cite" class=""><div class="">On 7 Apr 2019, at 9:08 PM, Mark Webb-Johnson <<a href="mailto:mark@webb-johnson.net" target="_blank" rel="noreferrer" class="">mark@webb-johnson.net</a>> wrote:</div><br class="m_-8680859910901462136Apple-interchange-newline"><div class=""><div dir="auto" class=""><div dir="ltr" class=""></div><div dir="ltr" class="">This is the closest we have today:</div><div dir="ltr" class=""><br class=""></div><div dir="ltr" class=""><span id="m_-8680859910901462136cid:FB5D7C10-7B69-4ECC-98AF-C500BB6C39A3" class=""><image1.jpeg></span></div><div dir="ltr" class=""><br class=""></div><div dir="ltr" class="">That is a bare modem board, with just the sip connectors. The prototype above is a K-line transceiver.</div><div dir="ltr" class=""><br class=""></div><div dir="ltr" class="">I think it would be trivial, and cheap, to make up what you show. Perhaps just solder ready pads at 0.1” pitch, then the side sip connectors wired to the first row of pads at each edge. Perhaps 5 PCBs in a kit, with sip edge connectors, unsoldered, in a simple plastic bag.</div><div dir="ltr" class=""><br class=""></div><div dir="ltr" class="">Does that sound like something useful? If so, I can ask the China guys for some idea of pricing. If it is just the unsoldered pcbs + parts, I don’t think it will be expensive.</div><div dir="ltr" class=""><br class=""></div><div dir="ltr" class="">Regards, Mark</div><div dir="ltr" class=""><br class="">On 7 Apr 2019, at 4:38 PM, Michael Balzer <<a href="mailto:dexter@expeedo.de" target="_blank" rel="noreferrer" class="">dexter@expeedo.de</a>> wrote:<br class=""><br class=""></div><blockquote type="cite" class=""><div dir="ltr" class="">
Mark,<br class="">
<br class="">
do you know of some kind of prototyping board available that fits to
our piggy back expansion layout?<br class="">
<br class="">
Something like this: <a href="https://www.robotshop.com/de/de/cytron-arduino-proto-schild.html" target="_blank" rel="noreferrer" class="">https://www.robotshop.com/de/de/cytron-arduino-proto-schild.html</a><br class="">
<br class="">
Regards,<br class="">
Michael<br class="">
<br class="">
<br class="">
<div class="m_-8680859910901462136moz-cite-prefix">Am 03.04.19 um 06:48 schrieb Mark
Webb-Johnson:<br class="">
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</div>
<div class="">If you have work to do on this DA26 expansion ports,
this is pretty cool and well built:</div>
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<div class=""><a href="https://www.aliexpress.com/item/26-Pin-D-SUB-DB26-3-Rows-Serial-Parallel-Port-Serial-Shellless-Male-And-Female-Connector/32886738786.html?spm=a2g0s.9042311.0.0.20924c4dg34EEU" target="_blank" rel="noreferrer" class="">https://www.aliexpress.com/item/26-Pin-D-SUB-DB26-3-Rows-Serial-Parallel-Port-Serial-Shellless-Male-And-Female-Connector/32886738786.html?spm=a2g0s.9042311.0.0.20924c4dg34EEU</a></div>
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