Search found 354 matches

by cato
Wed May 17, 2006 5:10 am
Forum: General Discussion
Topic: 3 prong Philips? Tampering with the tamper proof?
Replies: 12
Views: 4263

3 prong Philips? Tampering with the tamper proof?

I have a battery pack that I want to open up. To get things apart I need to unscrew some small screws. However, the screws are a bit unusual. They are sort of like Philips screws. But instead of having a 4 pronged cross, the screw head has a symmetric 3 pronged pattern ...old dudes, think peace sign...
by cato
Tue May 16, 2006 4:51 am
Forum: General Discussion
Topic: regulator or rectifier or both ??? anyone know..
Replies: 20
Views: 6155

The poorly pasted chart below indicates that harleys have regulator rectifiers HARLEY DAVIDSON YEAR STATOR PRICE REGULATOR/RECTIFIER PRICE BIG TWINS EVO 89-99 ESG990 99.00 ESR850 $79.00 FLH-FLT 97-98 ESG990 99.00 ESR851 $79.00 FLH-FLT TWINCAM 99-05 ESG995 99.00 ESR851 $79.00 SOFTTAIL 01-05 ESG995 99...
by cato
Sat May 06, 2006 6:42 am
Forum: General Discussion
Topic: VX-7R Symptoms
Replies: 4
Views: 1645

VX-7R Symptoms

Hey Gang - Have any of you had the battery of a VX-7R completely die? What are the symptoms? I mean, does a dead battery prevent the VX-7R from displaying the Now Charging message? My radio no longer displays that message (or Charge Complete) and the battery pack is inexplicably dead. Is anyone will...
by cato
Thu May 04, 2006 4:30 am
Forum: General Discussion
Topic: Conducting fabric
Replies: 6
Views: 2083

Smart Cloth http://web.media.mit.edu/~rehmi/fabric/ Wearable computers can now merge seamlessly into ordinary clothing. Using various conductive textiles, data and power distribution as well as sensing circuitry can be incorporated directly into wash-and-wear clothing. This paper describes some of ...
by cato
Sun Apr 09, 2006 6:08 am
Forum: General Discussion
Topic: Switching energy from one cap to another
Replies: 58
Views: 14651

MrAl wrote:Hello again,




cato:
Perhaps, but then we still have the em radiation to think about.
This would represent a loss too.
Well....if there is any radiated energy then the second cap doesn't get charged to the full value....
by cato
Sat Apr 08, 2006 2:56 pm
Forum: General Discussion
Topic: Switching energy from one cap to another
Replies: 58
Views: 14651

Why can't the entire capacitor be made from superconductor?
by cato
Sat Apr 08, 2006 6:56 am
Forum: General Discussion
Topic: Switching energy from one cap to another
Replies: 58
Views: 14651

Hi again cato, Well, if you have infinite current for an infinitely short period of time (0) you have (if you recall) an 'impulse', which only exists in pure theory, not in real life. Im not sure what you mean by "Oscillation has nothing to do with it". I was talking about the case where there are ...
by cato
Sat Apr 08, 2006 5:41 am
Forum: General Discussion
Topic: Switching energy from one cap to another
Replies: 58
Views: 14651

...which explains by the way..... why in the real world...SWITCHING power supplies are 80-90% efficient.
by cato
Sat Apr 08, 2006 5:26 am
Forum: General Discussion
Topic: Switching energy from one cap to another
Replies: 58
Views: 14651

Will: the case with the inductor means a perfect oscillator, and the case of one cap we cant charge one cap without also charging the other too so we cant even do the experiment. On the lighter part of your reply: ha ha. I hope that doesnt happen though if i try this he he :) Al Oscillation has not...
by cato
Sat Apr 08, 2006 5:18 am
Forum: General Discussion
Topic: Switching energy from one cap to another
Replies: 58
Views: 14651

Can't have infinite current?.....pfff...they used to say we couldn't have super conductors.....now you can buy them on the internet: http://www.oxinst.com/wps/wcm/connect/Oxford+Instruments/Products/Superconductive+Wires/Bronze+Nb3Sn/Nb3Sn-Bronze# :-p besides..... if you have infinite current, you o...
by cato
Sat Apr 08, 2006 5:06 am
Forum: General Discussion
Topic: Swap meet?
Replies: 22
Views: 7602

Assuming you're in the US, you can find the next coven of free/cheap chip loving ummm hobbiests near you here.


http://www.arrl.org/hamfests.html


With the deal you're offering, they will probably make you grand pooba!

:razz:
by cato
Sat Apr 08, 2006 4:56 am
Forum: General Discussion
Topic: Switching energy from one cap to another
Replies: 58
Views: 14651

Even with a lossless conductor, you will still have inductance, which, with the capacitors, forms an LC resonator which can radiate the energy. It can't resonate if you open my super conducting "switch" after the initial transfer of charge (or after the first have cycle)..... now where did the ener...
by cato
Sat Apr 08, 2006 4:40 am
Forum: General Discussion
Topic: testing proximity switch
Replies: 2
Views: 1425

jkl;
by cato
Sat Apr 08, 2006 4:25 am
Forum: General Discussion
Topic: position sensors
Replies: 11
Views: 4127

Whats moving the post? What kind of accuracy are you after? What would you like to use if you had a choice? What kind of budget do you have? Someone else suggested this a few psts up but beam break would probably be the the cheapest and most simple. There are a few tricks you could use but I would ...
by cato
Sat Apr 08, 2006 4:15 am
Forum: General Discussion
Topic: Switching energy from one cap to another
Replies: 58
Views: 14651

With a charged cap we have U = 1/2 C (Vsquared) ....jeez with the fancy new board, you'd think we could have superscripts..... assuming the second cap is the same value and they are connected by a super conductor..... the capacitance doubles and the voltage is cut in half (as I recall...somebody che...