<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Pete, <div><br></div><div>Thanks for the response - was wondering if I was the only one who struggled with something as basic as finding an on-off switch. </div><div><br></div><div><a href="http://media.digikey.com/pdf/Data%20Sheets/Judco%20PDFs/50-0015-00.pdf">Here</a> is the data sheet for the push button on-off switch. Thanks for the pointer on the cheaper Digikey alternative for my SPDT switch. Guess I will be ordering more of them.</div><div><br></div><div>Two other notes not related to this topic. </div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>1) I finished my testing of three potential 3.3V power supplies - Boost, Buck-Boost and Linear. I <a href="http://triembed.org/blog/?page_id=234">posted the results on the Triembed.org</a> blog but, it turned out that the TI Switching Buck-Boost power supply could extract about 37% more power from four AA batteries than the linear supply. </div><div><span class="Apple-tab-span" style="white-space:pre"> </span>2) If you are looking for a discount on Sparkfun products, there is a <a href="https://www.sparkfun.com/news/1594">contest running this week</a> that can get you up to a 25% discount off your next order. It involves taking some social media stuff but, hey I am not above sending a few tweets for a discount.</div><div><br></div><div>Thanks,</div><div><br></div><div>Chip</div><div><br></div><div><br></div><div><br></div><div><br></div><div><br><div><div>On Sep 16, 2014, at 1:00 PM, <a href="mailto:triembed-request@triembed.org">triembed-request@triembed.org</a> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">Send TriEmbed mailing list submissions to<br><span class="Apple-tab-span" style="white-space:pre"> </span><a href="mailto:triembed@triembed.org">triembed@triembed.org</a><br><br>To subscribe or unsubscribe via the World Wide Web, visit<br><span class="Apple-tab-span" style="white-space:pre"> </span>http://mail.triembed.org/mailman/listinfo/triembed_triembed.org<br>or, via email, send a message with subject or body 'help' to<br><span class="Apple-tab-span" style="white-space:pre"> </span>triembed-request@triembed.org<br><br>You can reach the person managing the list at<br><span class="Apple-tab-span" style="white-space:pre"> </span>triembed-owner@triembed.org<br><br>When replying, please edit your Subject line so it is more specific<br>than "Re: Contents of TriEmbed digest..."<br><br><br>Today's Topics:<br><br> 1. Re: Switching Switches (Pete Soper)<br><br><br>----------------------------------------------------------------------<br><br>Message: 1<br>Date: Tue, 16 Sep 2014 11:35:40 -0400<br>From: Pete Soper <pete@soper.us><br>To: triembed@triembed.org<br>Subject: Re: [TriEmbed] Switching Switches<br>Message-ID: <541858CC.6010306@soper.us><br>Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"<br><br>I'm not an expert, but I've spent dozens of hours looking at switch <br>specs over the past few years and know your pain. I haven't found a <br>decent cheat sheet for the nomenclature Digikey and others use either <br>(e.g. "off-(on)"). I spent another few minutes searching and only <br>reminded myself that the Wikipedia page <br><http://en.wikipedia.org/wiki/Switch#Contact_terminology> is still <br>worthless for this nomenclature. Can anybody reading this put us out of <br>our misery?<br><br>But don't buy that E-Switch part from Sparkfun, buy it from Digikey as <br>EG1903-ND <br><http://www.digikey.com/product-detail/en/EG1218/EG1903-ND/101726?WT.z_cid=ref_octopart_dkc_buynow&site=us> <br>($13.69 for 25). This is the same switch I've been using for a while. <br>There doesn't appear to be the obvious, potentially smaller SPST choice <br>(the E-Switch data sheet doesn't show one). But I agree 100% with your <br>heart: there is a much smaller press-on, press-off switch out there some <br>place. And this little slide switch we're using is the pits as far as <br>stuff splashing on it.<br><br>I haven't found any smaller switches except for tactile momentary ones, <br>which you wouldn't want unless you wanted to try Dave Jone's <br>soft-latching switch design <br><http://www.eevblog.com/2012/03/30/eevblog-262-worlds-simplest-soft-latching-power-switch-circuit/>. <br>(Not recommending that as a good choice for you, just as an FYI and <br>maybe of interest to others).<br><br>I'll try to remember to bring the collection of tactile switches I got <br>to try out for a project a while back. It might give folks at the next <br>meeting some idea of the mapping between "X grams pressure" and what <br>that really feels like, as well as sizes, etc.<br><br>Finally, we need a generic link to that Digikey switch you mentioned: <br>the URL in your msg isn't valid.<br><br>-Pete<br><br>On 09/14/2014 03:59 PM, Charles McClelland wrote:<br><blockquote type="cite">To any switch experts,<br><br>I have been looking for a small switch to turn on and off my low-power <br>board (less than 100mA) and have not found anything great. Part of <br>the issue is that the terminology of switches is confusing: on-off, <br>on-mom, off-(on), etc. and some of it must be due to my last of skill <br>in doing parametric searches on Digikey and Mouser. I just know the <br>switch I am looking for is out there but which of the tens of <br>thousands is it?<br><br>I have been usingthis <https://www.sparkfun.com/products/102> Single <br>Pole Double Throw (SPDT) power switch from Sparkfun. It works well <br>but it takes up space and I only need a Single Pole Single Throw <br>(SPST) variety. Ideally, I could find a push-on, push-off switch <br>which - I believe - is written on-off in the switch function <br>terminology but I have yet to find a source in my Google searching <br>that would confirm this.<br><br>I found this switch <br><http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail&itemSeq=157282720&uq=635463031929636734> after <br>a long search but I am still not sure it is the one I need as it only <br>says it is on-off (and not the more descriptive push-on, push-off) <br>anywhere on the documentation or website. Also, I am not sure if <br>there is something else I am missing after Paul's presentation where <br>the switch had significant noise. This should not be a big deal for a <br>power switch as I have a couple capacitors on both sides of the power <br>regulator - correct?<br><br>I am sweating these decisions because I need to make a number of these <br>boards for a project with the City of Raleigh and I don't want to <br>screw it up. If you have other suggestions within my component budget <br>of $1.50 a piece, please let me know.<br><br>Thanks,<br><br>Chip<br><br><br><br><br><br><br>_______________________________________________<br>Triangle, NC Embedded Computing mailing list<br>TriEmbed@triembed.org<br>http://mail.triembed.org/mailman/listinfo/triembed_triembed.org<br>TriEmbed web site: http://TriEmbed.org<br></blockquote><br>-------------- next part --------------<br>An HTML attachment was scrubbed...<br>URL: <http://mail.triembed.org/pipermail/triembed_triembed.org/attachments/20140916/842835ca/attachment-0001.html><br><br>------------------------------<br><br>Subject: Digest Footer<br><br>_______________________________________________<br>TriEmbed mailing list<br>TriEmbed@triembed.org<br>http://mail.triembed.org/mailman/listinfo/triembed_triembed.org<br><br><br>------------------------------<br><br>End of TriEmbed Digest, Vol 16, Issue 17<br>****************************************<br></blockquote></div><br></div></body></html>