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I'd like to build a flashing LED strobe for my recumbent bike. Are there any kits or How-To books I might use? I would like to use several led's mounted on the flag whip with power source and as much

Yes Jim, You've got it. Charge(voltage) and Electric field are to a capacitor what Current and Magnitic field are to an inductor. Doug Hale Jim Purcell wrote:

Ah ha, finally the source of confusion. The charge IS in the plates, the field IS in the dielectric. The charge and the field ARE NOT the same thing. An electric field exists between two opposite

Jim, Liked your mail. Charge is stored on the plates and the energy in the gap between the plates. This energy results from the field between the positive and negative charges on the plates. The

Ok, here is part of it. This is the part that I remembered about permitivity and permeability related to the speed of light. Check out this link:

sallehuddin, It needn't even be a low value. The reason for not just discharging it by shorting the leads is that short circuit current can damage the capacitor, not usually an amount that you will

Why is as important as What. When If I know a collection of facts but do not understand why they are so, I have no principles that I can apply in order to apprehend other facts. So when struggling to

<<If in doubt use the gloves. :-). Which brand of gloves would be good ! What must i do to make sure that the gloves is Good / insulated. I am always afraid of electricity.

No I can't. That one slipped out from memory and not an attributable reference. I will try and find support and you can try and find a way to refute it! Dang, I'll have to open that physics book

--- epsulon@... wrote: U just, connect a resistor parallel to the charged capacitor, some low value will be fine thank u, =====

Mr. Manifold (?) Can you be more specific in stating that dielectric always INCREASES the charge stored in a capacitor? I think there must be situations where change of dielectric DECREASES it. SUNAN

<<Could anybody point me in the right direction to design a capacitor tester. I have not done this. However a good lead would be to use the principle of RC constant. I normally use a simple sanwa

Try this link too. http://whatis.techtarget.com/definition/0,,sid9_gci211945,00.html Yes, a vacuum is a dielectric. The dielectric is defined as a "supporter of electrostatic fields". That means, the

I'm reading another basic book to get two points of view plus the little extras each book kind of offers. All the beginning books warn about cap. discharge, but they don't tell safe methods to

To: Electronics_101@... Sent: Tuesday, October 30, 2001 12:29 AM Subject: RE: [Electronics_101] Re: newbie inquiry Please tell me that 12VDC ~ 2Amps ~ 230 Watts (PC power Supply) don't

Try this link. I think it is a good explaination though it does not include the value of the permittivity of free space, 8.85 x 10-12 farad per meter (F/m).

Doug, Well said. Rama

IIRC, the dangerous levels are such as would deliver energy of 10 Joules along a path through the Heart, i.e. across the Thorax or via Head to Foot. A large capacitance could deliver this! Keith

Mark Kinsler wrote: The air dielectric capacitor is the finest example of why the charge is in the plate, not the dielectric - and how do the plates know that the dielectric is a vacuum and therefor