VU meter circuit using LM3915

This circuit uses just one IC and a very few number of external components ... an adjustable voltage reference and an accurate ten-step voltage divider. The high-impedance input buffer ... to the precision divider. Accuracy is typically better than 1 dB. VU meter circuit using LM3915 - Link [suite...]

Date: 2008-01-17 20:27:17
Blog: Circuits-Lab.com ...

Articles de blogs (76) | Vidéos (5)
 

Daylight savings: study concludes it doesn't save on energy costs

Justin Lahart of the Wall Street Journal reports today on a study done by University of California - Santa Barbara ... affects energy use. Using more than seven million monthly meter readings from Duke Energy Corp ... an additional $8.6 million in electricity bills. They conclude that the reduced cost of lighting in afternoons [suite...]

Date: 2008-02-27 13:40:53
Blog: Fort Wayne Observed...

Daylight Savings Wastes Money

From the Wall Street Journal: ---------------- For decades, conventional wisdom has held that daylight-saving time, which begins March 9, ... -saving time across Indiana found: • Residential electricity usage increased between ... how the time shift affects energy use. Using more than seven million monthly meter readings from Duke [suite...]

Date: 2008-02-28 05:59:29
Blog: The Western Right...

How to calibrate a Sverdlosk/Sverdlovsk 6 lightmeter...

This piece of lightmeter from the USSR, although not as tough as its predecessor, the Sverdlosk 4, is still tough enough for outdoor use ... your meter might be really sensitive after calibration. Heres how i had to use it afterwards. You set ... when you know you need to calibrate the meter. Free Image Hosting at allyoucanupload.com But since [suite...]

Date: 2008-02-18 12:11:15
Blog: morpheuse...

Daylight wastings

By Joseph Romm I have been asked this question about daylight saving time many times ... the time shift affects energy use. Using more than seven million monthly meter readings from Duke Energy ... households an additional $8.6 million in electricity bills. They conclude that the reduced cost of lighting [suite...]

Date: 2008-02-29 23:47:18
Blog: Gristmill: The environm...

DST Doesn’t Save Energy

Back when Congress was debating shifting the start and end of DST, ... way to see how the time shift affects energy use. Using more than seven million monthly meter readings ... Indiana households an additional $8.6 million in electricity bills. They conclude that the reduced [suite...]

Date: 2008-02-29 11:10:07
Blog: Mike The Actuary’s Musi...

It ain't what you don't know, its what you know that ain't so...

...one of my favorite Mark Twain aphorisms, that gets proved correct once again ... energy use. Using more than seven million monthly meter readings from Duke Energy Corp., covering nearly ... million in electricity bills. They conclude that the reduced cost of lighting in afternoons during [suite...]

Date: 2008-03-04 17:58:21
Blog: UNCoRRELATED...

AAAARRRRGGGG!!!!!!!

Remember back a week ago I mentioned that I was working at putting up the outdoor lights? HA! Thought it would only take me a day? HA HA!! ... of the icicle lights were out and using I couldn’t figure out where the bad bulbs were using my volt/ohm meter… day 4. So finally, I stopped at the local hardware store, spent 7 bucks and change [suite...]

Date: 2007-11-30 04:34:06
Blog: MoFiZiX Gr4FiX - Goofin...

Cruise's Church Calls For The "Global Obliteration" Of Psychiatry In Shocking New Video

A new video has surfaced from what seems to be the busiest studio in this strike ravaged town: The Church Of Scientology ... ." Sorry to burst your bubble, but the "magical LRH technology" a.k.a. the E-meter, which is used during ... measures the electrical resistance of the skin, which varies depending on how much sweat the body [suite...]

Date: 2008-02-08 21:31:48
Blog: daily mantra - welcome!...

Confused but not dazed...

Ok, before the gripes begin, I did some extensive searches here and on the web before I even thought of asking some of the questions I'm about to ask. Please bear with me, I don't even own a Prius yet! I'm still in the looking-test drive mode ... . Car electronics and electrical systems are not new to me. I can use a meg meter and other testing [suite...]

Date: 2008-03-06 00:17:01
Blog: Toyota Prius Online Com...

Around the Bend (Sensor)

So detecting when something bends can be important, right? Right. Don't ask me why, it just is. :-) But how do you detect it? ... , about what a voltage divider was, and what an op-amp was (turned out I didn't need the op-amp, even though ... to sensor joint) to an analog input like A1. You can use a volt meter to see what happens [suite...]

Date: 2008-02-26 22:01:22
Blog: Blog SPOT Blog ......

AMX Harnesses VoIP Technology to Add Telephony to Its Control Systems

AMSTERDAM – Jan. 29, 2008 – Today, AMX® announced that it is using Voice over IP (VoIP) ... telephone-voice-quality sound (70 dB SPL @ 1 meter). * When used in conjunction with the company’ ... -way voice communication from a door or gate to a Modero Touch Panel – homeowners will be able to speak [suite...]

Date: 2008-01-29 20:05:08
Blog: Briefing Room on SVConl...

Mercury Battery Replacements?

Mercury Battery Replacements? February 21st, 2008 by Vox in D.I.Y ... makers omitted any voltage compensation in their meter circuits, and simply used the battery itself ... timer, etc., this voltage discrepancy is unimportant. But a light meter works by measuring the exact [suite...]

Date: 2008-02-21 21:26:42
Blog: Silverbased.org | Proj...

Brown Planthoppers Threaten Mekong Paddy Crop

Farmers in Bac Lieu Province are battling brown planthoppers infesting their rice crops Agricultural agencies report that brown planthoppers have ... Development (DARD), Luong Ngoc Lan, said the density had reached 16,000 brown planthoppers per square meter ... plagued paddies because farmers used pesticides with low insect-resistance capability such as [suite...]

Date: 2008-02-26 12:54:17
Blog: Chao-Vietnam...

BEEE - BASIC ELECTRICAL ENGINEERING QUES. PAPER

BASIC ELECTRICAL ENGINEERING QUESTION PAPER ELE-101 Basic Electrical Engineering (B.Tech., 1st and 2nd Semester, 2122) Maximum Marks : 60 1 (a) ... 20 ohmand of inductance 0.5 h are connected in star across a three phase supply source of 400 v, 50 ... of induction motor ? (h) What is the basic type of instrument used in energy meter [suite...]

Date: 2008-01-01 22:50:36
Blog: Technical - Placement -...

Cerevellum Bike Computer Does It All, Including Video From Behind [Concept Prototype]

Soon you'll be able to set up a computer network on your bicycle that's just downright useful ... for that power meter. Ouch. But still, we really like that rear-view function. We're thinking by the time ... expending pedaling that bike. Heck, it even gives you eyes in the back of your head. Its digital [suite...]

Date: 2007-12-17 15:18:17
Blog: Gizmodo, the Gadget Gui...

Music with Ubuntu

Play it on remote HiFi speakers After several Linux trials and errors over the last couple of years, ... (/dev/hdd) audio VGA 2 x USB I have done some tests with a power meter and it uses about 10 Watts ... system. It turned out to be quite easy ;-) I installed Esound (or ESD, the The Enlightened Sound [suite...]

Date: 2007-10-26 09:33:47
Blog: TIENHUIS Networking...

Carmi speaks

I've been talking to reporters again. Here's a quick snapshot of some of the more notable hits from the last week ... the scroll bar to 28:30 into the hour-long package.)InternetNews. Wireless Price War a Boon ... wasn't the best business strategy. "That was a ridiculous approach -- using a meter to charge [suite...]

Date: 2008-02-26 07:18:24
Blog: Written Inc....

Denon AVR-3806 Review

A few months ago I was finally able to upgrade my audio system to something more worthy of my excellent Samsung DLP display ... drivers. Enter the setup menu and set the surround back amps to power the mains. After setting delays for the various speaker distances, I pulled out my trusty Radio Shack SPL meter to set levels. Using [suite...]

Date: 2008-01-18 02:32:29
Blog: Chris Eberle - ISF Cali...

Whoops! Maybe Daylight Savings Time Wastes Energy!

The conventional wisdom on daylight savings time has always been that it's a way to save energy by cutting down on the amount of lighting used at ... has its limitations. Researchers looked at the energy use patterns, taken straight from seven million monthly meter ... time after years of opting out. The study found that electricity use increased by [suite...]

Date: 2008-02-27 16:43:33
Blog: X Curmudgeon...

Welcome to RV.net Blog!!!

Welcome to all you RVers to the brand new, exciting, RV.net Blog!!! ... , buy and use electrical meters including multimeters and clamp-on meters for measuring alternating [suite...]

Date: 2008-01-09 02:28:57
Blog: RV.net Blog ...

How to Check Electricity and Energy Use

Add to iTunes | Add to YouTube | Add to Google | RSS Feed Do you know how much energy each of my 30″ monitors takes up? ... plug any device into Watt’s Up and the meter instantaneously displays the wattage being used, as well ... you can receive with this: Cost, in dollars and cents Frequency Volt-Amps Average monthly cost Power [suite...]

Date: 2008-01-24 04:58:14
Blog: Chris Pirillo...

Sound calibration using Avia

I adjusted my channel levels using an SPL Meter (RS dial model) and had everything set perfectly. Just for kicks, I threw in the Avia disk to see what it could add to the overall sound quality [suite...]

Date: 2007-12-22 14:19:57
Blog: Help with m2ts files - ...

zzZZzzzzzZZZZzzz~ 2007 good bye

wondering and thinking what on earth is going on to me..what was I've done in year 2007. from the beginning of the year, i been burdened with the final project. final project called "inductance and Q-factor Meter" using AVR micro controller. damn! if i could turn back time [suite...]

Date: 2007-12-07 19:01:00
Blog: insatiable...

Freedom Keyring GPS 2000 Receiver

The Freedom Keychain GPS 2000 Receiver can be charged in the car or at home ... . Baud Rate: 57,600 to 115,200 bps dependent on mobile phone. Frequency L1, 1,575.42 Mhz. Sensitivity ... Version 2.0 Class II. (CSR BC04.) - 10 Meter range, using Serial Port Profile (SPP). Software [suite...]

Date: 2007-12-04 17:39:57
Blog: Mobility Site - Windows...

First near-Earth triple asteroid found

Another cool bit of astronomy news: astronomers have discovered the first triple asteroid known to get near the Earth ... brings it near us. This made it a target for mapping using the giant 300 meter Arecibo radio telescope ... in its current orbit? All of these questions are interesting [suite...]

Date: 2008-02-14 18:30:48
Blog: Bad Astronomy Blog...

Spring Forward Wastes Energy

Don't forget to spring your clocks forward tonight. Daylight Saving Time begins at 2:00 a.m., March 9, 2008. ... :Using more than seven million monthly meter readings from Duke Energy Corp., covering nearly ... to daylight-saving time each year consumed more energy: • Residential electricity usage increased between [suite...]

Date: 2008-03-08 13:56:50
Blog: CALIFORNIA YANKEE...

Freedom Keychain GPS 2000 Receiver

Details: The Freedom Keychain GPS 2000 Receiver can be charged in the car or at home ... . Baud Rate: 57,600 to 115,200 bps dependent on mobile phone. Frequency L1, 1,575.42 Mhz. Sensitivity ... Class II. (CSR BC04.) - 10 Meter range, using Serial Port Profile (SPP). Software Packages [suite...]

Date: 2007-12-05 16:53:46
Blog: Just Another Mobile Pho...

I've never done that before...

One of the keys to northern medicine is the ability to improvise. That means that sometimes patients ask you to figure things out that aren't in the usual physician job description. One day you might need to figure out how to use a volt meter to see [suite...]

Date: 2008-02-27 02:16:53
Blog: Adventures In Medicine...

Power Monitoring Equipment Choice

For quite a while now, I have been stumped with what kind of equipment to get to measure power consumption ... for a USB device. Extech and Fluke are other pieces of equipment others have used, but nobody gives ... utilities require for their meters. To make reading the meter easy each Smart-Watt is equipped [suite...]

Date: 2007-12-15 01:34:20
Blog: Green Data Center Blog...

Mammillaria saboae ~ Green Thumb Sunday

Mammillaria saboae No flowers this week, but I think the spines on this miniature cactus are as beautiful as a flower ... ve to be diligent about using a moisture meter to gauge its watering needs until I’ve had it awhile. The shallow [suite...]

Date: 2007-11-04 03:16:00
Blog: Water When Dry...

DIY Audio Projects

DIY Audio Projects Posted by admin on February 24th, 2008 diyAudioProjects.com has a great collection of DIY audio Projects ... versus dual supply20W Audio Amplifier using LM1875Audio VU meter 9 leds20W Bridge Audio [suite...]

Date: 2008-02-24 10:20:12
Blog: Electronics-Lab.com Blo...

How to Make a Great Tasting Cup of Coffee - Its Not Rocket Science

There is good coffee and absolutely abysmal coffee. Both may start with the same elements, but one cup can taste completely different to another ... per cup. If you are making more than 10-cups of coffee you should use the strength meter [suite...]

Date: 2008-02-26 06:00:36
Blog: The Best Coffee Maker C...

City offers meter parking by cell phone

Winnipeg, Manitoba -- The city of Winnipeg, Manitoba, has launched a new service where drivers can top up their parking meter time from anywhere using a cell phone. Story: A four-month pilot project worked successfully, and the city rolled [suite...]

Date: 2008-03-07 07:31:45
Blog: The Money Times - Money...

All Wired Up, But Not Ready to Go

Byline: Pip Well, that was frustrating ... , I forgot how to use my fancy new multi-meter so I couldn't test the voltage. Hey, at least it was warm. ... . I just got back from trying to hook up the depth sounder display to the battery--no such luck [suite...]

Date: 2008-02-18 22:56:00
Blog: The Picaroon Blog | Bet...

Hearing Voices reviews the Fostex FR-2LE

After researching and spending some time with a handful of digital audio recorders a few months back, I decided to buy a Sony PCM-D50 ... VU meter, and uses CF cards for memory, which are far more common (and cheaper) than Sony Memory [suite...]

Date: 2008-02-13 13:02:00
Blog: Welcome to your web sit...

PHYSICS SYLLABUS

General: Units and dimensions, dimensional analysis; least count, significant figures; ... of the material of a wire using meter bridge and post office box. Mechanics: Kinematics in one and two [suite...]

Date: 2007-10-26 19:58:15
Blog: Latest placement,csir,j...

Nanotechnology Applications now on Agilent website

Nanotechnology Applications now on Agilent website October 26, 2007 by Grant Drenkow Today, ... polymer micelles are characterized with a liquid chromatograph / mass spectrometer.  An LCR meter is used [suite...]

Date: 2007-10-26 20:34:04
Blog: Agilent Nanotechnology ...

DK-Technologies Launches Four Waveform Monitors In One Unit With Its PT0760

Waveform monitoring is about to undergo a revolution thanks to a new product that DK-Technologies will be launching at this year’s NAB Convention in ... , while retaining the functionality of the built in monitor as a control panel. The unit’s HD/SD ... checkfield and monitor alignment signals. Ease of use is a key feature of the new meter [suite...]

Date: 2008-03-07 13:00:43
Blog: Briefing Room on SVConl...

do I need spark?

It seems like an engine should run without it, right?  I wish ... I rewired the magneto.   I used my Volt/Ohm meter to determine which wires could possibly be grounded [suite...]

Date: 2007-12-17 03:05:44
Blog: moped...

Nano-fibers may Power Handsets in the Future

One day your clothing could power or help to power your handset ... as a self-winding watch but on a scale measured in billionths of a meter. Nano-generators are able to use ... t be very popular in the office. But if your cell phone battery never ran down it might be worth [suite...]

Date: 2008-02-18 15:33:03
Blog: MobileCrunch...

What’s a Watt?

meter-graphic BuildingGreen.com has a very good and useful piece about energy measurement from the December 2007 Environmental Building News ... . Overall energy consumption of buildings, including both electricity and other fuels, is typically [suite...]

Date: 2008-02-28 05:53:00
Blog: Green Building Elements...

Share Huge Files in Seconds with Green Optical Network Technology

IBM Researchers today unveiled a prototype technology that could bring massive amounts of bandwidth in an energy efficient way to all kinds ... of power in supercomputers. For a typical 100 meter long link, the power consumed by the optical ... -- using the power of a single 100-watt lightbulb. This kind of bandwidth can drive energy [suite...]

Date: 2008-02-28 16:54:00
Blog: i-Stuff... Interesting ...

Once upon a time far, far

Once upon a time far, far away, I was a serious drunk driver. I drove for a living, high as a kite. That’s evil ... a week. When I crawled into bed at five in the morning she had an hour before her alarm went off ... was so intense I used booze to “knock off the edge.” If my meter and worked, I was good [suite...]

Date: 2008-01-31 09:00:18
Blog: International Falls Dai...

Woot: iKey Plus Portable USB Recorder - $89.99

Psst! Hey, kid! You don’t know me, but I’m your brother. How’d youlike free tickets to see the Doobs? Yeah, they’re on me. Take yourfriends ... charger input with DC adapter included for use with rechargeable batteries 6-bar VU meter with peak hold [suite...]

Date: 2007-10-25 05:23:23
Blog: HondaSwap Forums...

And the prize for most unusual use of Quicken goes to…

my husband, for his suggestion that I use Quicken to write a Christmas letter ... sound level meter, a book, a pan, vitamins, Venetian glass, an ornament, 30 printed photos, a bottle ... that high was kind of a fluke. For next year I’d like to reduce business expenses and increase [suite...]

Date: 2007-12-12 13:08:16
Blog: Those are some expensi...

Electronics Guide To Understanding Electricity And Electronics

Understanding Electricity and Electronics has been designed to be the best “first book” for anyone interested in becoming proficient in the ... of equipment needed is a volt-ohm meter. The appendices provide a handy reference for commonly used [suite...]

Date: 2007-12-22 12:46:00
Blog: MMOpenLibrary...

GiFi Offers 5Gb Short-Range Data Transfers

A team of 27 researchers and students at the Melbourne University recently unveiled their new GiFi chip, ... , as well. Using the 60GHz frequency, GiFi would be capable of data transfer speeds up to 5Gb over a 10 meter radius. This is like super-powered Bluetooth, here. Possible uses would be a video kiosk [suite...]

Date: 2008-02-22 22:29:40
Blog: SMS Text News ...

A credit for a name

The GeoNames blog carries news of improved commercial service with performance guarantees ... . They’ve come up with an interesting credit system to price and meter usage. Requests that are “ ... per day, which will take some using up. Otherwise a pay-as-U-process scheme along a faintly GRID [suite...]

Date: 2008-02-28 18:51:33
Blog: Mapping Hacks...

Sounds Lame

This sounds like the kind of "free music" idea that the labels would have (even though they are denying that they have signed a contract) ... -sharing technology that threatened to destroy it. Qtrax, a digital service announced today, promises ... , where the stupo-meter on this starts to become obvious:You know what your mother always used to say [suite...]

Date: 2008-01-28 17:52:20
Blog: Smalltalk Tidbits, Indu...

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