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POTS Problem

Hello, all. In addition to cellular service I still maintain a copper-back-to-central office phone line at my residence...
3 comments posted 10yrs
posted by arl_123234
3 comments posted 10yrs posted by arl_123234

Loose micro USB cables

A new cable works wonderfully. For maybe 6 weeks. Then when I use the Samsung phone while charging... "Beep-boop, beep-...
21 comments posted 10yrs
posted by not
21 comments posted 10yrs posted by not

Re: Schematics nomenclature

>From service manual for HP 34401A DMM. > >-=-=-=- > >> http://imgur.com/KWFIN1H >> >> Pins 12 and 13 have a little tri...
0 comments posted 10yrs
posted by gfretwell
0 comments posted 10yrs posted by gfretwell

Medium Voltage Distribution

Hello, and a question for AC power systems engineers and linemen: I've seen of few instances in the U.S. (primarily in...
11 comments posted 10yrs
posted by arl_123234
11 comments posted 10yrs posted by arl_123234

Electronic component suppliers

This Virtual Electronics Club Is Established To Build A Unique Electronics Culture Among Their Members Through Enhancin...
0 comments posted 10yrs
posted by ahlam.vec
0 comments posted 10yrs posted by ahlam.vec

What's wrong with this picture?

http://tabesh.edu.af/wp-content/uploads/2016/04/announcement-speakers-and-people.jpg Neal McLain
5 comments posted 10yrs
posted by nmclain
5 comments posted 10yrs posted by nmclain

Weird piezo driver

http://imgur.com/Trvs5mk This is a beeper piezo in a Fluke 117 DMM which quite beeping. Scoped the piezo?s pads and......
6 comments posted 10yrs
posted by not
6 comments posted 10yrs posted by not

House-sitting for millenials

?How do I turn off the bathroom light?? https://pbs.twimg.com/media/CbXWbQ-W8AAwSA8.jpg
5 comments posted 10yrs
posted by not
5 comments posted 10yrs posted by not

repair APC Smart-UPS: any dangers lurking inside?

Moin My trusty old APC Smart-UPS SU-1500 is still working fine generally, only that the C13/C14 output jacks in the bac...
1 comments posted 10yrs
posted by mathias
1 comments posted 10yrs posted by mathias

Wall warts

I'm a mechanical guy with a bunch of wall warts. They ranged in votage from 3 VDC to 5 VDC. Question is How can I conne...
1 comments posted 10yrs
posted by rwwink
1 comments posted 10yrs posted by rwwink

Help with SMB BJT identification?

3-terminal (well 4, including the tab) SOT-89/TO-243 (4.5 x 2.5 mm) package. Marked: 2108A 2216/36 Thanks.
3 comments posted 10yrs
posted by not
3 comments posted 10yrs posted by not

Replacement LED?

The LED in my flashlight is blinking (2/sec). It?s not the support circuitry (constant current): the voltage across the...
33 comments posted 10yrs
posted by not
33 comments posted 10yrs posted by not