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What's this IC? "274 E16 L309"

Hi, all. In a recently acquired pile of vintage junk (well not all junk, some good pieces!) I found a stick of 12 vinta...
2 comments posted 16yrs
posted by junk2007
2 comments posted 16yrs posted by junk2007

Schematics question

Hi, I am reading instrutions on hooking up an Intellibeam IB-250s intruder alarm system.. It sends a beam from transmit...
29 comments posted 16yrs
posted by scredcropshonnospam
29 comments posted 16yrs posted by scredcropshonnospam

Always buy your heavy copper conductors in December

Prices again are on the rise and are expected to go higher than usual because three of the big copper mines are in chil...
0 comments posted 16yrs
posted by anewton611
0 comments posted 16yrs posted by anewton611

Reverse rotation

Hello everyone, due to the closure of a nearby airbase we've come into posession of an intact and working helicopter! I...
4 comments posted 16yrs
posted by helgathehousekeeper
4 comments posted 16yrs posted by helgathehousekeeper

Elementary question - what makes the current flow?

There are many equations to describe what happens whenever it does happen, but why does the current flow in the first p...
37 comments posted 16yrs
posted by incognito
37 comments posted 16yrs posted by incognito

Kitchen circuit suddenly reading 40V

I plugged our vacuum in to the GFI in the kitchen, and when I turned it on, I heard a "pop" and assumed it was the GFI...
28 comments posted 16yrs
posted by waterrockets
28 comments posted 16yrs posted by waterrockets

Demand side energy leveling?

Hi all, Disclaimer - I'm not an electrical but a mechanical engineer, so I might be asking what could be a very stupid...
4 comments posted 16yrs
posted by runcible_spoon57
4 comments posted 16yrs posted by runcible_spoon57

Evening courses in Helicoptery

It's not just Helicopting made easy, it's a complete grounding in Helicoptery leading to an qualification you can fail...
0 comments posted 16yrs
posted by the14thdisciple
0 comments posted 16yrs posted by the14thdisciple

Saving money on lighting with power quality analyzer

Lighting is a major element of operating costs for most facilities. Lighting costs involve both energy and maintenance....
2 comments posted 16yrs
posted by oatmealrunner
2 comments posted 16yrs posted by oatmealrunner

2010-02-27 new EPLAN programs added

2010-02-27 new EPLAN programs added please send e-mail to : ola 'AT' mail 'DOT' gr , ola3 'AT' mailbox 'DOT' gr , ( ple...
0 comments posted 16yrs
posted by telvvcd
0 comments posted 16yrs posted by telvvcd

RJ-45 "through wire" crimp connectors?

I remember seeing RJ-45 (cat 5 I think they were) crimp connectors that had holes for the conductors drilled entirely t...
3 comments posted 16yrs
posted by see
3 comments posted 16yrs posted by see

Adapting a Garmin Traffic Receiver to car antenna?

Garmin makes an "integrated" FM traffic info receiver for some models of GPS that allows connection to the car's AM/FM...
18 comments posted 16yrs
posted by invalid
18 comments posted 16yrs posted by invalid

Case or pouch for Fluke 87 + probes?

I've got a new 87 and I want to get a protective case for it. Fluke wants $35 for what amounts to a piece of pleather a...
18 comments posted 16yrs
posted by invalid
18 comments posted 16yrs posted by invalid