Search found 326 matches

by kheston
Sat Dec 26, 2009 7:56 pm
Forum: General Discussion
Topic: DC Genset - I've gone and over-complicated things
Replies: 9
Views: 1637

Re: DC Genset - I've gone and over-complicated things

MrAl, 1. You have four batteries, each 12v, and they are wired in series and power some stuff as 48vdc right? correct, they power a 3.6kw inverter 2. You have four alternators, each one powers it's own battery. yes, they are isolated from one another and each is connected to one of the 12v AGM batts...
by kheston
Sat Dec 26, 2009 3:25 pm
Forum: General Discussion
Topic: DC Genset - I've gone and over-complicated things
Replies: 9
Views: 1637

DC Genset - I've gone and over-complicated things

I've been using MrAl's circuit with my DIY genset for some time now, it works well for the 12v setup I had initially. However, in the 48v system I'm experimenting with now, I've run into some trouble. There are now four of the MrAl-gulators controlling each of the four alternators and the PID tuning...
by kheston
Sat Dec 26, 2009 11:57 am
Forum: General Discussion
Topic: Use pspice models in LTSpice?
Replies: 3
Views: 1722

Re: Use pspice models in LTSpice?

I've got a model of a 1N5401 that has those parentheses, but it has the same problem.

I can get .SUBCKT to work, but not .MODEL. I wonder if all models need to be wrapped in a .SUBCKT in order to be found using only SYMATTR directives in the .asy file. Not sure.
by kheston
Fri Dec 25, 2009 7:34 pm
Forum: General Discussion
Topic: Use pspice models in LTSpice?
Replies: 3
Views: 1722

Re: Use pspice models in LTSpice?

I'm able to make this work, but not without a .inc directive. I've tried it 20 different ways, but I'm unable to make the ModelFile asy SYMATTR work. Any LTSpice gurus out there?
by kheston
Sun Dec 20, 2009 9:32 pm
Forum: Computer Programming
Topic: *.lib and *.olb into spice, how?
Replies: 6
Views: 4348

Re: *.lib and *.olb into spice, how?

Posted this before I realized it was in the programming forum. Moving to General forum:

http://forum.servomagazine.com/viewtopi ... =1&t=15171

Sorry for the duplicate post. I'd delete it here, but someone disabled that capability.
by kheston
Sun Dec 20, 2009 9:29 pm
Forum: General Discussion
Topic: Use pspice models in LTSpice?
Replies: 3
Views: 1722

Use pspice models in LTSpice?

Has anyone found a good guide for importing pspice models into LTSpice? I couldn't a TIP3055 and a 1N5340 in the pre-installed components, so I figured I'd try my hand at finding/fixing my own. I'm having trouble following Biggelz' guide. It seems to say that I just need to copy (or create) a simila...
by kheston
Sun Dec 20, 2009 4:40 pm
Forum: Computer Programming
Topic: *.lib and *.olb into spice, how?
Replies: 6
Views: 4348

Re: *.lib and *.olb into spice, how?

Has anyone found a good guide for importing pspice models into LTSpice? I couldn't a TIP3055 and a 1N5340 in the pre-installed components, so I figured I'd try my hand at finding/fixing my own. I'm having trouble following Biggelz' guide. It seems to say that I just need to copy (or create) a simila...
by kheston
Thu Dec 17, 2009 3:56 am
Forum: General Discussion
Topic: A video blog I found
Replies: 4
Views: 691

Re: A video blog I found

I'll check out the one on caps, that certainly sounds interesting...
by kheston
Thu Dec 17, 2009 3:52 am
Forum: General Discussion
Topic: Audiophiles nessecity?
Replies: 34
Views: 2798

Re: Audiophiles nessecity?

A far more ubiquitous yet not quite as egregious example of this is MonsterCable. People buy these things all the time, despite the studies that prove they are no better than standard zip cord (or is it lamp cord?) at a fraction of the price. People actually pay $150k for a pair of speakers or $8k f...
by kheston
Tue Dec 15, 2009 4:05 pm
Forum: General Discussion
Topic: A video blog I found
Replies: 4
Views: 691

Re: A video blog I found

Microchip has just moved up a notch with me. Great stuff!

Rare to find a video blog for such a niche audience. Dave's got some other vids worth watching as well. Thanks for the link!
by kheston
Wed Dec 09, 2009 2:08 am
Forum: Computer Programming
Topic: Second hard drive
Replies: 13
Views: 2817

Re: Second hard drive

Knoppix and SysRescCd are free Linux distributions that boot from your CDRom. Each comes with "parted" or "gparted" that can be used to create and format NTFS partitions. I would try downloading the ISO for one of them (Knoppix is a fully-functional Linux desktop, SysRescCd is more of a utility) and...
by kheston
Sun Nov 29, 2009 10:37 am
Forum: General Discussion
Topic: Cellular (800Mhz) antennas/boosters?
Replies: 22
Views: 6132

Re: Cellular (800Mhz) antennas/boosters?

Ceasar, Still in research mode. So far, I've only managed to experience the continual frustration of not having built a better antenna. I have a modem for data and a Motorola Droid for voice. I'm looking for TNC connectors/adapters at the moment. Surprisingly, given the ubiquity of cellular tech, my...
by kheston
Fri Nov 27, 2009 10:42 pm
Forum: General Discussion
Topic: SatNav precision, accuracy or resolution...
Replies: 8
Views: 1100

Re: SatNav precision, accuracy or resolution...

Ceasar,

Does the Trimble and Thales survey stuff that comes up on eBay all the time even hold a candle to the pricey equipment you're talking about? Any idea what level of accuracy can be had for the $500-1500 range (used) that this stuff seems to sell for?
by kheston
Fri Nov 27, 2009 9:50 pm
Forum: General Discussion
Topic: Want to "convert" RV heat...
Replies: 5
Views: 880

Re: Want to "convert" RV heat...

Tim, I'm writing you this from my 24ft trailer parked in the middle of nowhere with no power lines in sight. It's a comfy 70 degrees, thanks to my LPG force-air furnace. I'm not sure what you have against LP heat, but you couldn't get me to part with mine. My battery bank wouldn't power one of those...
by kheston
Wed Nov 18, 2009 10:43 pm
Forum: General Discussion
Topic: Cellular (800Mhz) antennas/boosters?
Replies: 22
Views: 6132

Re: Cellular (800Mhz) antennas/boosters?

CaeSar,

One of the antennas I have is ~7" long. The calculator you pointed me to shows this must be a 1/2 wave antenna. Pretty cool!