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Power fail indicator circuit?

Two 120vac sump pumps do main and backup duty. Each is powered via dedicated circuit breaker from different phases of 3...
15 comments posted 19yrs
posted by incognito
15 comments posted 19yrs posted by incognito

Power Cost Meter for 115V?

Can anyone recommend a simple power meter for a 115V 20A outlet that not only measures amperage, but also has some abil...
11 comments posted 19yrs
posted by westes-usc
11 comments posted 19yrs posted by westes-usc

Unusual Diff. Pressure switch sought

I'm dealing with a control problem that involves a differential pressure (D.P.) switch mounted across the check valve a...
10 comments posted 19yrs
posted by mj.hamill
10 comments posted 19yrs posted by mj.hamill

How to hook up a frequency meter for a generator.

I've got a generator, and I need to set the frequency, so I bought a cheap frequency meter on ebay. It's a Wacline N203...
3 comments posted 19yrs
posted by drskew
3 comments posted 19yrs posted by drskew

$100,000 global environmental design challenge

Hi, just wanted the group to know about Live EDGE--Electronic Design for the Global Competitionsponsored by Newark's pa...
0 comments posted 19yrs
posted by jfleisher
0 comments posted 19yrs posted by jfleisher

LED Systems, Technologies and Applications

Dear Sirs, LED Systems, Technologies and Applications Fair , will be held on 6th =E2=80=93 9th September in Istanbul. W...
0 comments posted 19yrs
posted by emel_kilinc
0 comments posted 19yrs posted by emel_kilinc

Coiling a motor

Hello everyone, I recently bought a 1/4hp motor that i want to recoil differently. The rotor contains four electro magn...
20 comments posted 19yrs
posted by lerameur
20 comments posted 19yrs posted by lerameur

The Gilmartin Waterwheel

Hey, I'm not an engineer, but I practically grew up in a garage. I put a lot of energy related info on my blog, includi...
0 comments posted 19yrs
posted by attendant
0 comments posted 19yrs posted by attendant

problem needing sugestions

any ideas on how to transmit from small speaker on gps device to a head inside a motorbike helmet can not hear gps inst...
2 comments posted 19yrs
posted by haggisz
2 comments posted 19yrs posted by haggisz

wiring 12 amp fan

I was wondering what cable size to use for wiring a 125V 12 amp fan that is 100 feet away from the breaker panel. Thanks...
4 comments posted 19yrs
posted by henry
4 comments posted 19yrs posted by henry

installing a 30 amp circuit

Group, I am installing a computer equipment rack in my home office. The Power strip (PDU) that I want to use is the Gei...
13 comments posted 19yrs
posted by ejsimcox
13 comments posted 19yrs posted by ejsimcox

Question on Powersave 1200

Just saw a commercial for the Powersave 1200, which will save you hundreds, if not thousands, of dollars in energy bill...
35 comments posted 19yrs
posted by idontwork
35 comments posted 19yrs posted by idontwork