Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Hi folks, sorry to be such a pain (?), but I just reviewed some of the Ian Rogers/Mickster dialogue/posts (aka primadonnas) and conclude that as this site appears to be dominated by their largely IT-orientated stuff, I will be departing now-bon chance amies, et bon soir! (please excuse my French).
Ian Rogers posted a solution for a "purely on/off " situation, which I appreciate, but would not solve my problem. The diagram was annotated as such and could not perform a reversal. The circuit I posted works and is there if anyone else would perhaps need it.
I am not here to argue, just to fix...
You have a cognitive situation. " I thought it was a matter of a simplistic polarity reversal problem" is not what you posted. You posted an "on/off" solution. This was not a solution to my problem. Please get your facts straight before mouthing off in full view of all the members.
PS We should...
The solution proposed was a simplistic on/off function that demonstrates that you did not understand the problem. Never mind, no harm done as I solved it myself.
Well folks, I just received the relays from RS and built a Heath Robinson, hard-wired (on a piece of scrap plywood!) lash-up as a prototype and it worked fine. If I hide it in a box will probably use it as the finished product. Pic attached fo your amusement.
Well, if you're so smart you should have shown off your skill earlier. Congratulations on having solved the problem previously, I am very impressed, you are truly extraordinaire!
Hi guys. I think I have come up with a simple electro-mechanical solution. My perception of the problem was "How to get the valve motor to reverse when the GSHP is powered down?" That is to say, the valve control needs to be entirely automatic in response to GSHP on/off status.
Two x 5 pin...
I like simple - but I cannot see how your suggestion will work. The proposed system is attached. I need to change the polarity when the main power is switched OFF- this is my only problem. Take a look at the attached diagram.
OK guys, this is the full story!
I aim to pump well water through a ground source heat pump (GSHP). When the GSHP is inactive, ie powered down I need to isolate the well water from it, but still keep the well water available for a domestic supply.
So, I intend to use a small motorised valve...
A 12vdc 2w motorised valve needs to have its input wires polarity reversed to open and close the valve according to whether there is power being supplied to another component in the system (which is not directly connected electrically to this valve)
In other words, when the separate component...
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