The standard TO-330 sized LM series (you'll be wanting the 7833) are generally capable of 1A.

The LM317 adjustable regulator is capable of 1.5A.  It's a different pinout than the 78xx and you'll need a pair of resistors to set the output voltage (google lm317 calculator for help with that).

You refer to a switcher; all these I mention are linear regulators, so if you're very worried about efficiency or heat dissipation keep looking.  

-j

It didn't occur to me to look for postscript output in the CAM processor.  Using the CAM processor's PS device did the trick!  now I hope my toner transfer/etch fab process (and skills) are up to the task.

thanks!

-j

I thought about that, but I've had problems getting 1:1 in the past, so I thought I'd try to find a way to make eagle do what I want.

I may have to generate gerbers and use a gerber tool of some sort to print it.

-j

I'm using the latest Mac version of eagle.  I've got some smaller pitched devices that come out as a single blob when I print the board layout on an HP laser printer (1200 dpi).  I can't find a setting to influence this.

Any clues on how to increase the print resolution?

-j

Yep, the ExpressPCB software definitely sucks bigtime, and it's windows only.

I hope to try batchpcb soon.

-j

Thanks for the pointers to the app note and the new device.  I'm in no hurry, so it won't kill me to wait for it.  

The app note leads me to believe that the calculations are simpler than I would have guessed.  Not sure why, but I was envisioning some calculus.  

-j

The HMC6343 (which has a third axis and accelerometers) does do a good job
at compensating for tilt.

I don't doubt it, but even the HMC6352 is more expensive than a cheap GPS; the HMC6343 is well out of the budget for my application right now.

The Garmin GPS units (especially the GPS18) do a pretty good job of maintaining a sane heading indication, even at low speeds or when stopped (got to allow for moving in reverse, though).  I'm not sure the expense ($US50) is even worth it for the HMC6352.

-j

Has anyone tried using a HMC6352 compass mounted in (or on) a vehicle?  Does it compensate for all that metal, and how bad are the measurements when on an incline?

thanks.

-j

The MCP3208 is an 8 channel ADC, and it's trivial to run 2 of them.  code for it is in the playground, and I posted code for using multiple units on the forum a few days ago.

-j

well, the description for "bar sport" says "any language"...

-j

Yet another place where the old, abandoned technology (network news) is far superior to the replacement: forums have no killfile.  

-j

The temperature sensor needs a radiation shield to protect it from direct sunlight, but still allow air circulation to get an accurate air temperature measurement. Here is an example of one made with sheet metal.  Another method involves several plastic dishes for a small flower pot.  They are oriented upside down, all but the top one have most of the bottom cut out, and they have spacers between them.  IIRC they should be painted white.

Look at some of the commercial weather stations for ideas, then rummage around the kitchen or local discount store for parts.

-j

IIRC, the most recent versions of OS X do not support the G3 processors, but I don't recall exactly where the cutoff is.

I've seen a linux distro (BeOS?) on an old old PPC mac (actually a mac clone, that's how long ago it was), but i don't remember any details.

-j

The mac wireless (bluetooth) keyboard is almost exactly the same size and layout as the mac laptops.

Not cheap, though.

-j

I'm thinking of the sort of scope that gets routinely thrown out, working, by schools, colleges

Speaking as an employee of such an institution, that stuff generally gets surplused (sold at auction in lots).  Those things are expensive when purchased, and expensive things get tracked (long past the point when they still have value, in many cases).  You may have to look for a notice of a sale, buy a box/pallet sized lot, find one that works, then probably get probes somewhere else (since students seem to destroy them at an alarming rate).  Sell the remainder one at a time on ebay, maybe even making a buck along the way.

Businesses, on the other hand, may toss the stuff, or give it to an employee.

I already have a scope, but I'm watching for that US$150 USB logic probe to come out with mac/linux versions of the software.  I've had enough SPI and I²C problems that it may be worth it.

Hackaday has been featuring a few projects with a project known as the "bus pirate" (PIC-based, IIRC).  I haven't looked at it myself, but it could be worth a look if you're in the market for a digital signal analyzer on a budget.

-j