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zener diode

I have what I believe is a zener diode. One end is red and the other end is blue. What kind of zener diode is this and...
25 comments posted 18yrs
posted by ara
25 comments posted 18yrs posted by ara

Grounded neutral in an old sub-panel

The existing (old) sub-panel is fed by 2 phases and an uninsulated neutral conductor. There is no ground bus, return co...
68 comments posted 18yrs
posted by jojo
68 comments posted 18yrs posted by jojo

bios problem

how poor i'm,my notebook can't operate with win xp after i wrongly update my notebook presario bios from f25 to f12
1 comments posted 18yrs
posted by snarme3
1 comments posted 18yrs posted by snarme3

Induction

Hi All, I have an idea for a project based upon induction/wireless power transmittion. Basically, a mains voltage suppl...
0 comments posted 18yrs
posted by vertuas
0 comments posted 18yrs posted by vertuas

Ground in residential system?

I understand the protection that a ground conductor provides a user that may come in contact with the appliance if it b...
7 comments posted 18yrs
posted by bg
7 comments posted 18yrs posted by bg

About the Radio-Shack (Tandy) 22-175b multimeter

Hello I have a Radio-Shack (Tandy) 22-175b digital multimeter. Wen I use it to measure capacitors it do not do it's 0 b...
22 comments posted 18yrs
posted by ba221
22 comments posted 18yrs posted by ba221

Soldering techniques, new video website

Hi all, I've just finished constructing a new site that has web videos on soldering techniques http://supersolderingsec...
0 comments posted 18yrs
posted by tony
0 comments posted 18yrs posted by tony

the newest one

http://www.baidu.com/s?ie=gb2312&bs=%B1%B1%BE%A9+%CE%E4%BA%BA%BA%BD%BF%D5%BB%F5%D4%CB&sr=&z=&cl=3&f=8&wd=%B1%B1%BE%A9%B5...
0 comments posted 18yrs
posted by kill65
0 comments posted 18yrs posted by kill65

TTL Schematics

The early Texas Instruments TTL Databooks of 1974/1976 showed the full actual Gate-Logic Schematics for each of the TTL...
0 comments posted 18yrs
posted by unique
0 comments posted 18yrs posted by unique

scavenging opto-isolators

Suppose I want to scavenge opto-isolators (such as the 6N138 or 6N139) from discarded electronic devices. What kinds of...
61 comments posted 18yrs
posted by ara
61 comments posted 18yrs posted by ara

transfromer testing

hai, i have 220vac/75vac 460hz transfromer shall i test it with 230vac 50hz supply
7 comments posted 18yrs
posted by anandvelans
7 comments posted 18yrs posted by anandvelans

hello we need band members

hello we need band members for a band (obviously) so if you wan to audition email me at snipped-for-privacy@gmail.com(co...
0 comments posted 18yrs
posted by darking506
0 comments posted 18yrs posted by darking506

Re: 70V questions

>>> >> >> >> >> >>> >> >> > Hi Guys (Posted this on alt.electronics but it seems like only spam >> >> > lives out there...
1 comments posted 18yrs
posted by jfields
1 comments posted 18yrs posted by jfields

Protection bag when doing EFT or surge tests

Hi, don't know if it's the right place for this, so apologize me. I used to use some kind of protection bag when doing...
0 comments posted 18yrs
posted by frank.N0.SP4M.wolff
0 comments posted 18yrs posted by frank.N0.SP4M.wolff