Photo Diodes

hi.

this is upen from chennai.

i m a student n i m trying to build a automatic switch which will work on light conditions(street light) i.e no need to switch it on or off it will automatically be done.

so i need help regarding photodiodes. please send me all the details that can

Low Running Amp of Pump

Dear sir,

Our chilled water system consists of primary and secondary system.

We have 7 nos of same capacity primary chilled water pumps (end suction pump)which are installed parallel. The pump operation is 5 running + 2 stand-by.

The problem is one of the pump is running at low amp co

Where Do You Buy Car Parts On-Line?

I like to ask this question every so often because I'm always looking for new sources. Lately, I've been geeking out a lot on Amazon.com's parts site. People generally don't think of going to a book site for car stuff - and the parts department is very much buried on the the Amazon homepage.

Should Front-of-Package Food Labels Be Banned?

Labeling on the front of food packages is generally meant to be helpful, but does the intrinsic conflict of interest between the desire to sell more products and wanting to inform the public cause problems for consumers?

The Upside

A lot of foods now come with nutrition fact l

Radar Displays and Layering

I am doing a project where in I am simulating the Radar display... I need to write the code using advanced opengl (Layering concept).... But I am not finding the right person to guide me for this project.... Can I know whome I should contact for this...???

Thank You...

Driving Screws at 90 Degrees

I am having problems with some lab equipment. The distance between the case and the part I want to remove won't let me use even my shortest screwdriver. I am about to cut part of the handle of the screwdriver, but want to check if there is some kind of "elbow screwdriver" for this kind of job.

CMS IntelliCAD – Upgrade Advice

Hello Guys & Gals,

I really could use some advice from you that also use CMS IntelliCAD. I'm only looking to upgrade my older version of the software and not looking to switch to another brand. I like what I do have installed, but it's getting a little old in the tooth, so I'm s

March Military Campaign – The Lockheed Twister

The Twister was a Corvair-powered, articulated, multi-wheeled vehicle built by Lockheed for the U.S. military. Like the Gama Goat, however, only the prototype of the Lockheed Twister used Corvair power - though in this case, it used more of everything: eight wheels and dual 164-cu.in. Corvair si

High Pressure Flame-Gas Tank Safety

I'm hoping for either some discussion or education on a possible saftey implement to help protect property and emergency responders. I'm traditionally a biologist, so excuse the layman's language. I appreciate the help, Thank you.

Background: I'm looking into Boiling Liquid Expanding

Gas Chromatography for Used Motor Oil

HI,after running silica column fractionization for my extracted used motor oil from soil which giver colorless compound for f1 the aliphatic,, i did rota vap and dried it under nitrogen stream and the f1 now is in yelow in color. any idea how can i dilute it to send for Gac chromatography and what i