QED

[ivconic]

hello bugs,



good question,

i guess it would depend on how much of a production line you want set up at your home
and how valuable your time is.

some people a PCB would work fine, and then there those people a complete working unit won't be enough

Philip

"Carl's law", clauses:
3. Wanting complete control.....
and
5. Forget about building detectors.....



P.S.
Ain't life a "beach"...ha!!!

[bugwhiskers]

Another video showing the QED with an 18" MONO coil being Ground Balanced over some very hot Australian ironstone/red clay ground.


http://www.youtube.com/watch?v=8Znj3...endscreen&NR=1

[bugwhiskers]

The QED schematic. If any circuit elements are copyright or patented, please let me know and I will change it.

[Carl-NC]

Doug, good to see you back where the action is... whatever happened to that PM I allegedly sent you?

Carl you sent me a private PM ticking me off for high jacking Aziz's thread.

I was hoping to find out what I said.

[Carl-NC]

Patents are just dumb, and there are lots of dumb people hovering patent offices. Trolls as well. So you patent - you lose.

I'm not opposed to the concept of patents, they can have value. But the system as it is, is horribly broken. It's way too easy to get a patent, the USPTO is grossly overwhelmed and staffed with undercompetent examiners, and the ability to challenge patents limited and expensive. And, of course, patents don't mean squat in China. But the ability for an independent inventor to protect a novel idea should be available.

[Carl-NC]

Man this is the craziest thread I've read.
Seems like it is a carry-over from another forum and you guys agreed to move it here - much like a ham radio conversation moving to a different band...

You guys started talking about this QED then started listing issues -
1) Sensitivity or issue with "harmonics".
2) Sensitivity to "mains frequencies".
3) Picking up radio stations.
4) Board layout issues(?)
5) Detector cannot operate near one of the same model.

How about splitting each of these into separate threads(?)
What are the symptoms of "harmonic sensitivity"?
My detectors all are sensitive to "mains" frequencies - I have underground AC in my housing tract and it seriously messes with all of my detectors (Tesoro, Minelab, Whites...) It does seem to depend on time of day - I can't figure out why.
Mine don't pick up radio station interference but I can see how that could easily happen given the gains and types of opamps commonly used. Usually easy fixes for this.
Don't most detectors have issues working near others of the same model?


Maybe you guys are all just under the influence of many beers and having good fun.

Sorry, Barry... you're right, this is a carry-over from another forum, where the vast majority (as in: all) of non-conformants get the axe. Ergo, they look for a place that allows reasonable discussion.

All of these issues are nonsensical diversions from the One True Issue: Why is it that PUDs never make it to market? Post #76 deals with that.

[hdphilip]

hey bugs,

Thats pretty neat, from what it looks like your slave dspic handles the "house keeping",

the audio, SD card etc etc. i guess writing to the SD card with the main dspic would kill the timing,



on my project, i'm going to try a 14 bit dac to a vco tied on the same spi bus i use for the
16 bit adc and nest the routine in the TX pulse

Philip

Why is it that PUDs never make it to market? Post #76 deals with that.

my project will never go to market, at most a pcb sheild for a chipkit.

[dougAEGPF]

Doug, good to see you back where the action is... whatever happened to that PM I allegedly sent you?



I was hoping to find out what I said.

I misinterpreted “Reply to thread 'Let's made a PC-base metal detector with usb interface !!!'” which I read first in my email box as me being personally being ticked off for high jacking the thread. Your post appears now not to be directed at anyone in particular. However I was I believe not the first poster to high jack the thread!

dougAEGPF

[Carl-NC]

Making a successful PI detector is not rocket science.

Not really, but the PUDs are running about 0-for-5 right now. Not a stellar track record.

Any suggestions on the best way to market it, partial kit, full kit, fully built on ebay?

Read post #76.

Here's a challenge for you... build a production run of 20 units. Just 20! See how long it takes you. See how much money it costs you. Keep very accurate records. Figure in labor, overhead, taxes, marketing, and eventual service. Then see how much you need to charge for those detectors to make it worth your while.

I'll betcha that those Gawd-awful prices Minelab charges start to look rather reasonable. I'll also betcha that you'd rather be working on R&D than running a one-man production line.

[bugwhiskers]

hey bugs,

Thats pretty neat, from what it looks like your slave dspic handles the "house keeping",

the audio, SD card etc etc. i guess writing to the SD card with the main dspic would kill the timing,



on my project, i'm going to try a 14 bit dac to a vco tied on the same spi bus i use for the
16 bit adc and nest the routine in the TX pulse

Philip



my project will never go to market, at most a pcb sheild for a chipkit.

The slave is 100% micro SD card audio. It can be omitted completely and 2 * passive LCD screens hooked up to H4 LCD HEADER for the user visual interface. The only controls are 2 Optical encoders that allow a myriad of user adjustments. It's a detector tinkerers dream with so many opportunities to learn. All user adjustments including GB are stored to the micro's flash memory at switch off.

[Carl-NC]

I misinterpreted “Reply to thread 'Let's made a PC-base metal detector with usb interface !!!'” which I read first in my email box as me being personally being ticked off for high jacking the thread. Your post appears now not to be directed at anyone in particular. However I was I believe not the first poster to high jack the thread!

dougAEGPF

I never accused you of hijacking the thread.

[bugwhiskers]

The certified/granted QED patent claims.

[dougAEGPF]

Here are two earlier Rev QED's resting against the back of my car during a break in field testing.I found a very small nugget about 50 feet from the car using the QED. As far as I know I was the first person to find gold with the QED!
http://s271.photobucket.com/albums/jj137/douginpoz/?action=view¤t=QEDs1.jpg

dougAEGPF

[Carl-NC]

BW, what do you think that patent is worth?

[Carl-NC]

Doug, what do you think that photo is worth?