<div dir="ltr">Oh, just for fun let's throw in another one...<div><br></div><div><span style="font-size:12.8px">It looks like the valve only draws 500 mA, so another solution might be an h-bridge motor controller like this one:</span><div style="font-size:12.8px"><br></div><div style="font-size:12.8px"><a href="https://www.sparkfun.com/products/9457?gclid=Cj0KEQiAkIWzBRDK1ayo-Yjt38wBEiQAi7NnPzpApRz_AelXlv20-7_opMojKVRmnl-3T45dF-4cX4UaAv9s8P8HAQ" target="_blank">https://www.sparkfun.com/products/9457?gclid=Cj0KEQiAkIWzBRDK1ayo-Yjt38wBEiQAi7NnPzpApRz_AelXlv20-7_opMojKVRmnl-3T45dF-4cX4UaAv9s8P8HAQ</a></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Dec 4, 2015 at 1:35 PM, Brian via TriEmbed <span dir="ltr"><<a href="mailto:triembed@triembed.org" target="_blank">triembed@triembed.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Looks like all the simple solutions have been presented! Two relays is the way to go. I favor the SPDT approach; only one relay ever needs to be engaged at once (and both engaged is another "off" configuration).<br>
<br>
-B<span class=""><br>
<br>
On 12/4/2015 1:13 PM, Josh Wyatt via TriEmbed wrote:<br>
</span><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">
To further Pete's suggestion- you can use a single DPDT or two SPDT<br>
relays to accomplish this.<br>
<br></span>
Here's a nice <a href="http://allaboutcircuits.com" rel="noreferrer" target="_blank">allaboutcircuits.com</a> <<a href="http://allaboutcircuits.com" rel="noreferrer" target="_blank">http://allaboutcircuits.com</a>> post<span class=""><br>
about it:<br>
<a href="http://forum.allaboutcircuits.com/threads/reversing-polarity-with-spdt-relays.30679/" rel="noreferrer" target="_blank">http://forum.allaboutcircuits.com/threads/reversing-polarity-with-spdt-relays.30679/</a><br>
<br>
Let me know if you need more help!<br>
<br>
Thanks,<br>
Josh<br>
<br>
On Fri, Dec 4, 2015 at 1:07 PM, Pete Soper via TriEmbed<br></span><span class="">
<<a href="mailto:triembed@triembed.org" target="_blank">triembed@triembed.org</a> <mailto:<a href="mailto:triembed@triembed.org" target="_blank">triembed@triembed.org</a>>> wrote:<br>
<br>
Just string together a few plain relays.<br>
-Pete<br>
<br>
<br>
On 12/04/2015 12:51 PM, Grawburg via TriEmbed wrote:<br>
<br>
I have a quarter-turn ball valve with a 12V actuator [HSH-Flo<br>
1/2" DN15 12VDC CR-05 FNPT SS304 Position Feedback Motorized<br>
Electric Ball Valve.] I'm using opto-isolated relay activated<br>
by a Raspberry Pi but can only control one direction because the<br>
valve reverses direction by flipping the leads. If I was doing<br>
it mechanically I would have a double pole triple throw rotary<br>
switch. I cannot find a suitable opto-isolated relay that is<br>
2P3T...at least one that doesn't cost a fortune. Any suggestions<br>
to help me think this through would be welcomed.<br>
<br>
<br>
Thanks,<br>
Brian Grawburg<br>
<br>
<br>
<br>
<br>
<br>
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</span></blockquote><div class="HOEnZb"><div class="h5">
<br>
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