Superpositioned comments

"Measuring the speed of light with Chocolate Chips" by Jack Mullet

Thu, 03 May 2007 11:14:41 -0700

Wow unbelievable, although there was one problem with one of the measurements. It should be 12*16 dimensional to the protractor and the plate must be standardised steel with the high heat of the microwave which causes the chocolates to melt quicker than anyone could anticipate. But for the most part, i really enjoyed this project.

"Measuring the speed of light with Chocolate Chips" by YO YO in the fridge

Thu, 03 May 2007 11:11:29 -0700

Too COOL! I hadthe most fantastic time with the studying of the speed of light. This experiment was exciting and more than ever interesting!

"DIY LED lighting Guide" by Chadd

Thu, 22 Mar 2007 22:39:35 -0700

If you are looking for PWM LED circuit, I would suggest using a micro controller, such as the PIC16505. This will allow you to control your pulse width and duty cycle as needed. I have seen one company who works with the PIC Micro ( http://www.LunarAccents.com ), but if you have training in electronics technology you might be able to implement a simple PIC circuit on your own!

"Doorknob touch alarm" by himani

Thu, 15 Mar 2007 04:18:47 -0700

i m unable to find what i want. there is lack of information. so i m not satisfied with urinformation.

"Doorknob touch alarm" by Dave

Tue, 13 Mar 2007 05:33:54 -0700

hi would like to know what component the ZVNL110A (Q1) is? and the flip flop chip as all the pins from 1-14 are used apart from 2 and 13 does this mean 2 and 13 are just floating no connected to anything? thank you

"Doorknob touch alarm" by jethro

Thu, 08 Mar 2007 20:06:23 -0800

can u send me procedures and the list of components and where to buy them?its brilliant,whwew!

"DIY LED lighting Guide" by FryGuy

Sat, 24 Feb 2007 21:25:22 -0800

Resistor power dissipation is just that. Its is the power the resistor has to get rid of for the given current flowing threw it. So depending on the resistors value and the current flow, determines the resistor wattage you need.

Basically the lower the resistance the lower the wattage of the resistor can be for a given current. The resistor is acting as more of a conductor then a load so it don’t need to get rid of power (P= V x I).

"Finally a new layout!" by Matthew

Thu, 18 Jan 2007 12:53:14 -0800

Testing this again.

"Doorknob touch alarm" by Mike

Tue, 16 Jan 2007 19:30:28 -0800

Why does C2, not have a unit on the schematic, is it uF?

"Doorknob touch alarm" by SLATE

Sun, 31 Dec 2006 23:33:07 -0800

Why do you need a parts list? If you cant figure them out, you probably shouldn’t be building it.

The parts are on the schematic. I don’t even know how to read a schematic, yet I’m smart enough to figure out the parts are right on it. You just have to know what the symbols mean. A quick Google will tell you what the different symbols mean.

Hell, just looking at it, I just figured out that ) | is a capacitor and ^v^v^ is a resistor.

"Powering LEDs costs mere pennies" by snappleman

Tue, 19 Dec 2006 20:06:56 -0800

this owrks so good i lvoe this project im gonna keep it for ever. because i did it i get to go to the scinece fair.

"Finally a new layout!" by Matthew

Sun, 17 Dec 2006 09:03:51 -0800

Unfortunately, there has been a small issue with the site lately. I did not realize that Ruby 1.8.4 is required for Typo 4.0! Luckily nobody noticed anything unless you tried to post a comment and it never appeared.

"Measuring the speed of light with Chocolate Chips" by nancy at lc

Sun, 17 Dec 2006 00:38:18 -0800

I tried this with the chips at home and it worked great. I used it in my class with a large chocolate bar, and it didn’t work as well (we were off by over 2x the speed of light). So stick with the chips!

"Doorknob touch alarm" by vag

Fri, 08 Dec 2006 01:30:33 -0800

can somebody please send to my email ad the parts list and procedure of this project (vicvag1314@yahoo.com). i need it asap. Tnx u very much!!!

"Doorknob touch alarm" by harry

Thu, 07 Dec 2006 23:50:35 -0800

van we also use this in the pcb?

"Doorknob touch alarm" by raghvedra tatke

Fri, 24 Nov 2006 04:24:34 -0800

i,m satisfied by the information. now i can make door knob touch alarm very easily.alarm is very effective it even wakes me up in the morning.

"Measuring the speed of light with Chocolate Chips" by Sidra Iqbal

Mon, 20 Nov 2006 06:21:43 -0800

i thinkk this is a good information about how can we measure the speed

"A single transistor smart battery charger" by Jignesh Rane

Sun, 12 Nov 2006 22:21:06 -0800

Hi,

I have HHR-70AAA NIMH Battery. I want to charge it with 250mA current as a fast charge up to 6.8 volt and after that 75mA current for trickle charging. Can you suggest me circuit for this?

From,

Jignesh.

Compatible Power Pvt. Ltd.

"Finally a new layout!" by Matthew

Sun, 12 Nov 2006 05:56:46 -0800

This is a test! :)

"A low power, long life LED flashlight circuit" by Par

Thu, 09 Nov 2006 18:40:51 -0800

Could this type of circuit be built with only 1 or 2 LEDs and an on/off switch? I need to build a small circuit board with only 1-2 white LEDs using 9v or less and it needs to last at least 14 days constant or 28 days, running it 8-9 hrs a day. Is it possible? Can ya help me out? I am not extremely knowledgable in this field. Thanks, Phil