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 Forum: General Discussion   Topic: Detecting a magnet... from a distance.

Posted: Thu Feb 01, 2018 8:57 am 

Replies: 18
Views: 399


So that $1,200 price tag is real? Hard to believe.

 Forum: General Discussion   Topic: Very unusual desoldering method...

Posted: Thu Feb 01, 2018 7:40 am 

Replies: 8
Views: 213


Maybe add a glass lens and fry small critters like ants!
Or, contactless wood burning!

 Forum: General Discussion   Topic: Detecting a magnet... from a distance.

Posted: Thu Feb 01, 2018 7:29 am 

Replies: 18
Views: 399


That price of $1,200 seems a tad high for that chip.
Should be: https://www.amazon.com/TMR2102P-Linear-Magnetic-Sensor-package/dp/B00OY9K2F6/ref=lp_12725042011_1_1?srs=12725042011&ie=UTF8&qid=1517498611&sr=8-1

Of course, lenp's idea is feasible too. :)

 Forum: General Discussion   Topic: Detecting a magnet... from a distance.

Posted: Wed Jan 31, 2018 2:35 pm 

Replies: 18
Views: 399


I'll bite. How about a million-turns coil, and a nano-voltmeter?
Question- would it be more or less sensitive with air core or iron core?

 Forum: General Discussion   Topic: Hammond die cast al case, heat sink?

Posted: Sun Jan 14, 2018 5:50 am 

Replies: 11
Views: 323


Better than no heat sink!

 Forum: General Discussion   Topic: Greetings!

 Post subject: Re: Greetings!
Posted: Thu Dec 28, 2017 6:40 am 

Replies: 5
Views: 187


Hoping all us kids got what they were hoping for this Christmas! (if you've been nice all year!)
The only plan I found that works for not enough storage space is to buy more space. Time to move! :)
Happy New Year all!
John

 Forum: Then & Now   Topic: Do You Remember....

 Post subject: Re: Do You Remember....
Posted: Fri Dec 08, 2017 12:38 pm 

Replies: 15
Views: 4311


They sure were! I used a ThruLine wattmeter/SWR Meter in the Air Force in the 60's.

 Forum: Then & Now   Topic: Do You Remember....

 Post subject: Re: Do You Remember....
Posted: Wed Nov 29, 2017 11:37 am 

Replies: 15
Views: 4311


Correct dacflyer! It was before I found out that the antenna had to be tuned! Had to learn about "resonance"!
Next build was a homebrew antenna tuner. Much fun.

 Forum: Then & Now   Topic: Do You Remember....

 Post subject: Re: Do You Remember....
Posted: Wed Nov 08, 2017 3:57 pm 

Replies: 15
Views: 4311


And today, if those guys (us?) can't change the settings on their browser, or forward a cellphone call, or switch to "Aircraft Mode", they're considered a blithering idiot. In the day, we got into electronics for what it was. Now, you can't function without several email accounts, and a he...

 Forum: General Discussion   Topic: Microwave oven transformer... reversed.

Posted: Wed Nov 08, 2017 3:31 pm 

Replies: 10
Views: 829


Amazingly versatile transformer, that is. Wind it for whatever you like!
Only concern about an unloaded secondary with the primary powered, is contact between the secondary wires! Lotta amps!

 Forum: General Discussion   Topic: Ink Drowned my AIO Printer

Posted: Mon Oct 16, 2017 10:45 am 

Replies: 14
Views: 985


Thanks, but still cannot find in the manual any hints at "Cleaning the cartridge nozzles". :(
Have used hot water after removing the cartridge from the machine, or even isopropyl alcohol. But, the old cartridges are stubbornly clogged.

 Forum: General Discussion   Topic: Ink Drowned my AIO Printer

Posted: Tue Oct 10, 2017 6:28 am 

Replies: 14
Views: 985


Sorry to hear of the inkjet troubles! My ancient HP650C Plotter is still chugging along, as I do quite a bit of roll printing. Cartridges for this 1990-era machine are the problem. Many, many suppliers sell old reman cartridges, or out of date originals, so finding ones that work is a constant searc...

 Forum: General Discussion   Topic: USB Power

 Post subject: Re: USB Power
Posted: Tue Oct 10, 2017 6:06 am 

Replies: 7
Views: 553


From the wiki page that Janitor Tzap referenced:

Electrical
Signal 5 V DC
Max. voltage
5.00+0.25
−0.60 V[a]
5.00+0.25
−0.55 V (USB 3.0)
20.00 V (PD)
Max. current
0.5 A (USB 2.0)
0.9 A (USB 3.0)
5 A (BC 1.2)
3 A (type-C)
Up to 5 A (PD)

 Forum: General Discussion   Topic: Dead Dell Laptop

 Post subject: Re: Dead Dell Laptop
Posted: Fri Aug 18, 2017 4:33 pm 

Replies: 4
Views: 704


Good info! Thanks! Next comes connector replacement!

 Forum: General Discussion   Topic: Dead Dell Laptop

 Post subject: Dead Dell Laptop
Posted: Fri Aug 18, 2017 10:01 am 

Replies: 4
Views: 704


Well, not entirely dead, but battery will not charge. Dell Inspiron 8500 laptop, many years old, but reliable until now. Works on AC, but battery does not charge, all of a sudden. Tried an old, but still OK battery and same result- doesn't charge. Also, on power up, get the message, "AC Power A...
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