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efremjw

Re:iRobot Terra Robot Lawn Mower – First Impressions on Saturday January 11, 2020 @12:42PM (#22021153)
Man look at that little critter fly!! I think the principles for using an AM radio are sound. I found two radios, and used them, but I couldn't quite make sense of what I was hearing. Perhaps there was a ton of localized interference. I stepped up my approach by purchasing an underground wire locator from Amazon. This gizmo sends an amplified steady signal down the perimeter wire and a separate portable device listens for the signal as I walk along the perimeter. This didn't work as easily as I'd hoped. My guess is that due to the existence of one very large perimeter wire and three intersecting shortcut-to-home wires, there's some interference/signal degradation that complicates finding the break, especially since there's normally multiple breaks due to the relatively large population of squirrels. There's got to be an easier way to find a break! I think the conclusion here is that I should just keep a bunch of loaded bird feeders to occupy their time!
Re:iRobot Terra Robot Lawn Mower – First Impressions on Thursday January 09, 2020 @06:26PM (#22006991)
Same problem here! Squirrels have gnawed through my perimeter wire dozens of times. I have the Husqvarna Automower 450x, which allows for three shortcut home wires. Repairing the broken wire is easy...finding the break, however, is extremely difficult and time consuming. I've had the mower for 2 years and it's been awesome in every other way. I'm thinking of pulling up my entire perimeter wire and installing a new wire deeper. No doubt this will make finding future breaks more difficult, but I hope that by being deeper, the squirrel problem will go away.
Re:Ask a Knifemaker: The Truth About Damascus Steel on Friday September 21, 2018 @04:55AM (#18038200)
Right, but even raw pure stainless of let's say 304 or 316 will rust in naked form due to the small crevices left on the surface straight from the mill...if multiple dissimilar layers of stainless or folded, it seems to me that stainless Damascus will be very vulnerable to rusting... unless there is something in the chemistry between the individual layers that mitigates this, no?
Re:Ask a Knifemaker: The Truth About Damascus Steel on Sunday September 16, 2018 @08:07PM (#18002096)
Is it possible to make corrosion resistant stainless in the Damascus style...or will the dissimilar materials cause galvanic corrosion or the spaces between the different alloys result in crevice corrosion?

Ask HN: Programmable low RPM DC motor continuous reed switch controller

Need help finding a simple DC motor controller. I'm using two Linak actuators of different spindle lengths. Both have reed switches, giving 6 pulses per revolution. The actuators have 3 wires: 2 for power, 1 for the reed sensor. I need some sort of way of controlling this setup and setting a single "memory" position in-between the two overload positions of "both up" and "both down".

( Read More... | no comments | on HN )
Re:North Korea announces successful hydrogen bomb test on Wednesday January 06, 2016 @02:07AM (#10849088)
The myth of nuclear deterrence is an interesting concept http://setbpbx.nuclearfiles.org/menu/key-issues/nuclear-weap...
Thank you - the last sentence of your last point is my main concern.
Re:Tesla is a Battery Company on Thursday April 02, 2015 @07:59AM (#9310071)
Whose battery IP does Tesla use?
Obscure ecommerce platform ABC doesn't have an API with inventory management software XYZ. The ABC customer is considering paying a few thousand bucks for the integration with XYZ. Other ecommerce platforms have an API with XYZ. Should the customer pay for the integration or seriously consider changing ecommerce platforms? What are the critical ongoing performance and maintenance factors to consider?
Re:Orion Flight Test Live Launch on Friday December 05, 2014 @08:39AM (#8704403)
Damn that was amazing! What a perfect launch!!

How specialized was the heavy lift configuration for the Orion payload?

Re:NYC Rat Map on Thursday December 04, 2014 @12:59AM (#8698031)
Two weeks ago, I actually met a city health department employee who focuses on rat populations in NYC. She was doing a survey of businesses along Avenue C (Alphabet City) in reaction to complaints of a swelling rat population on Avenue B. Apparently, Hurricane Sandy had washed significant parts of the rat population from Avenue C to Avenue B...and with the start of the cold season, those rats will be looking for warmer places to hang...perhaps on Avenue B.
Re:The University of Florida Sparse Matrix Collection on Wednesday November 26, 2014 @09:24AM (#8662387)
Thanks guys
Re:The University of Florida Sparse Matrix Collection on Wednesday November 26, 2014 @08:49AM (#8662252)
Just curious, what purpose does this serve/in what applications is this useful?
Re:Worse on Saturday March 15, 2014 @03:33PM (#7405956)
so don't pay for it you moron
Re:U.S. fourth-quarter GDP cut to 2.4% from 3.2% on Friday February 28, 2014 @08:55AM (#7318692)
of course...but it's not the first estimate...and this isn't a small correction
Thanks. The efergy clips seem too good to be true! How do I know if they're accurate?
Re:Introducing our smart contact lens project (for diabetics) on Friday January 17, 2014 @07:28AM (#7075400)
ohhhh, because it's just so comfortable to have contacts in the first place. what's wrong with embedding somewhere else?

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