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Snubbing a relay coil is simple, given that the direction of the current is always constant. Just use a diode. For a single coil latching relay, where you swap the polarity of the control voltage (24VDC in this case)to latch and unlatch, whats the best way to snub the coil? I'm seeing some...

In the midst of a discussion with another PM about this.... System is 3 phase, 480VAC, total HP of motors are 28.166 (25,2,.5, 1/3, 1/3) and 42.3FLC (36,3.5,1.2,.8,.8) I'm saying that we need a disconnect rated at min of 30HP or 45A....he says its 1/3 of that since each phase carries 1/3 of...

Anyone familiar with the section in NEC that discusses 70V audio? I was told it was grandfathered in, such that you do not need to have it in conduit, but looking for the article number to reference that.

again...a story of two companies with deep pockets and an army of company lawyers. If every company was worried about patent infringments, then there wouldnt ever be new products developed.

I've not used it, but SolidWorks had a module for cable diagrams...you could draw it in the assembly using 3D and it would calculate the lengths, etc I just use a regualar cad program (autocad or designCad)

Well...you have to relize that they made a business from sueing others with deep pockets and until they finally had someone that didnt back down, did a pretty nice income from it. I do see your point on being the mfg of lighting products..but the way it usually works, the patent holder first...

Sometimes...you just accept a design...thats how its always been done, but I wonder...its a bit of black magik for a mostly digital guy. 3.3V board voltage being fed to a RF section (say..a 2.4GHz module). Do not take into account any filtering other than simple bypassing being done on the...

end users cant be sued for patent infringment from a mfg...mfg are the ones that would have to pay the patent holder for loss of revenue.

Just getting started on this project....to preface I've been away from AB PLC programming for 6 or so years now but a client has asked specifically for a Micrologix1200 and Panelview, so I have the hardware, and finally the software installed... The program isnt all that complex, and I can take...

True...used to do alot of AB but then went to a less expensive brand till this. I'm not sure if our local guys have much knowledge, but worth a try. I just thought at least the documentation that came with it ought to have a little more explantion of the comm ports. The link provided in the...

Its been years since I've done an AB PLC, last ones were way back in time with the SLC500 bricks. Client *insisted* on a Micrologix. OK, so I now have a Micrologix1000, and gettng RSLOGIX updated to do the programming. I have a model 1761-L32AWA Looking thru the manual, and googling some...

thanks for the link to the other group. I did a search for micrologix before I posted and ended up empty.

Just back to this....I actually am going with the ON Semi circuit, pretty straight forward, and the inductor is on the way (as are the ON parts). The problem with Power Integrations is the custom coils for it. Otherwise, nice product line. Agency approval will be required anyway, for the...

Its been years since I've done an AB PLC, last ones were way back in time with the SLC500 bricks. Client *insisted* on a Micrologix. OK, so I now have a Micrologix1000, and gettng RSLOGIX updated to do the programming. I have a model 1761-L32AWA Looking thru the manual, and googling some...

Perfect. And coilcraft is one of the best companies to work with, samples well and my local rep is great. Thanks very much!!

Scotty...I agree, sometimes the quick approach turns out to be more of a headache. The only problem I've seen uin using a switchmode type device is what appears to be semi-custom transformers, at least in the app notes. Are you familiar with any that have designs using off the shelf transformers?

In the near future, it would appear the sale of the traditional wal-warts will be a thing of the past in California, and probably followed on by other states. So, do new devices that are to be sold in California that might use a simple transformer type supply embedded, subject to the same...

Thats what I was afraid of....doing a custom. I suppose for production runs of 100's thats ok, just the unexpected NRE for my client. I've got a bunch of X10 modules, guess I can tear into those.

Looking for a source on smallish PV panels...in the range of 5" by up to 12". This is to be used on a portable battery charging system. Before its asked, I haven't worked out the battery capacity or anything else, just trying to gather data at this point so I can see what my design variables...

Hopefully this is the correct forum to post this in. Best way to describe what I am looking for is think about the timers you plug into the wall outlet, and then you plug a lamp into it. I am looking for the tabs that can be PCB mounted for both plugging into the outlet as well as plugging...