<div dir="auto">I once had a project where I wanted to use the small pcb mounted relays, and I found that the ones I found weren't rated for extended on times -- they were basically meant for momentary use only, which didn't suit the application.</div><div dir="auto"><br></div><div dir="auto">I'm sure there are probably ones (at a higher price point than I was willing to go to) that don't have that limitation, but definitely review your data sheets carefully for that characteristic.</div><div dir="auto"><br></div><div dir="auto">I ended up using a combination of a 4pdt switch and vn104 fets which have very low R-on. Was trying to replace a massive 9 pole switch for a euro layout. It worked well enough but I wasn't entirely happy with it so it's in the pile of shame...</div><div dir="auto"><br></div><div dir="auto">Pete</div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jul 3, 2024 at 12:08 AM Roman via Synth-diy <<a href="mailto:synth-diy@synth-diy.org">synth-diy@synth-diy.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><p dir="ltr" style="margin-top:0px;margin-bottom:0px">You could always use relays intead of a mux.</p>
<p dir="ltr" style="margin-top:0px;margin-bottom:0px">CV friendly and pretty high current capacity. </p>
<br>
<p dir="ltr" style="margin-top:0px;margin-bottom:0px">Roman </p><br><br>---- Użytkownik Paul Glass-Steel via Synth-diy napisał ----<br><br><div dir="ltr">The switching function is ancillary to the module's primary function as a window comparator; if I have to choose between bidirectional or pitch-CV friendly, I'll take bidirectional. But, if I can have both at the cost of some complexity - it's middling-complex already, so what's a bit more, perhaps? </div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Jul 2, 2024 at 2:52 PM Mattias Rickardsson <<a href="mailto:mr@analogue.org" target="_blank">mr@analogue.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div dir="auto">Does it have to be bidirectional?<div dir="auto">Feels like this is the trickiest part to get around. :-)</div><div dir="auto"><br></div><div dir="auto">/mr</div><div dir="auto"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Den tis 2 juli 2024 17:08Paul Glass-Steel via Synth-diy <<a href="mailto:synth-diy@synth-diy.org" target="_blank">synth-diy@synth-diy.org</a>> skrev:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div dir="ltr">Hello all,<div><br></div><div>I'm working up a bi-directional switch module around the TI MUX507 analog switch IC. The datasheet lists the maximum IO current as 30mA. I'd like to proof the switch against the fault condition of having the IO spanning my +/- 12V rails, however remote that mis-connection might be.</div><div><br></div><div>By Ohm's law, the bulk series resistor needed would be 820R 1W, rounding to common values. I imagine that resistance would be high enough to audibly affect pitch CV. Is there a better or more elegant solution to limit the current?</div><div><br></div><div>Thanks,</div><div>-Paul</div><div><br></div><div><br></div></div>
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