Help on new detector design

Hi GD, thanks for your excellent input. I am using a Hantek DSO202B  20MHZ 1 GSa/s digital oscilloscope with fast eaveform capture, FFT, and thumb drive storage. My computer and my electronics shack are in different places and can' t be changed. I can stretch the area beneath the coil collapse area to full screen, measure down to picoseconds. However, like I mentioned, I am not using the standard resistor damped coil method of transmitting the the signal, so there is no counter emf coil colapse signal to measure. Parts of my design will have to be quiet for now, but I will reveal later. I will still need a delay signal though. My plan was to see what most people were using as a general starting point, then super correlate to what I am doing. My earlier resistor damped pi detector did not require a delay signal. It eliminated the drive signal, and transformed the remaining signal into a rectangular pulse. It then compared that pulse width to a standard value and determined whether it was ferrous or iron. All in hardware.
Dusty Carl

Posted on: July 15, 2017, 10:16:55 am

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		Quote:			Posted by homefire
	There was a instance this last week some yabboe flew his drone over a  forest fire to get photo's for a contest by some TV station.  They had to ground Air Support that caused the Fire Crews to pull off the line.  Looks like the guy could be doing some jail time last talk was.  That kind of stuff is how the Government gets teeth to get ugly.

Right here in Arizona.


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A bad day at gold prospecting or metal detecting is better than a good day at work.

		Quote:			Posted by GoldDigger1950
	The AMA (Academy of Model Aeronautics) rules say you can't fly withing 4 miles of an airport or anywhere withing 4 miles of an active airplane action like an air show. Notice that they have RC flying at a lot of air shows but they always ground the big guys first. I once flew RC off the USS Ranger during a flight deck barbecue. Permission from the skipper, of course. There was a local club on the ship and we used to fly when in port. We had a blast flying over the Indian Ocean. Ah, memories.

Similar story.. Flew my Carl Goldberg Falcon 56 through the CO's plate glass office window over in Korea!!!.   He actually thought it was funny. Whew..

Homie. Give us an update on that scope.

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  Received notification the scope was being shipped just hours after payment was made 071417.  Today E mail states shipped 071717 LOL.  It's a Chines thing.  Tracking number will not work until it hits State Side.

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		Quote:			Posted by homefire
	Any Head Way ?   Check out this one !  Novel Stuff.   You are not allowed to view links. Please Register or Login https://www.instructables.com/id/Eco-Friendly-Arduino-Metal-Detector/?utm_source=newsletter&utm_medium=email

This is very helpful. Been having similar ideas.   What if we combined your basket weave coils with this display. very handy out in the filed.    
I was think adding one of theses to the XR 71.

 

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		Quote:			Posted by homefire
	There are options.  You are not allowed to view links. Please Register or Login http://www.youtube.com/watch?v=XHDNXXhg3Hg Posted on: July 25, 2017, 07:56:13 pm   Or better : You are not allowed to view links. Please Register or Login http://www.youtube.com/watch?v=jYaWjMUfkMg

Thanks I feel a bit brain dead. I have a few Arduino shields. The nano and the 256 Mega. it never occurred to me they would have projects ready to go. 

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