An idea for USB detector

[Unregistered]

hi

Indeed there are only 2 cent, not enough !!!!!

[Aziz]

Your guys have not recognized the technology behind this.
It gives much detection improvements.

Ok, it is not practical to carry a laptop. Not yet! But the principle works also with lightweigt and small PDA's.


Aziz

[Berti]

hi

Maybe PDA's manufactures can implement a lock-in amplifier and a HD sound card.
So, just get a good coil and its done.

I don't know how much $$$


It's a good work Aziz

[Aziz]

Hi Berti,

Maybe PDA's manufactures can implement a lock-in amplifier and a HD sound card.
So, just get a good coil and its done.

I don't know how much $$$


It's a good work Aziz

Well, I prefer small laptops. They are cheap and easy to get. But the main reason is the signal processing hardware: better external sound-cards available and can be plugged via USB, PCMCIA or ExpressCard-Bus.
I have heavy doubts having a good sound-card built-in in a PDA at the moment.

We are just entering a new technology regarding the laptops: called nettops.
Like my Asus Eee PC 901 there are some other simular devices available now (e.g. Acer - I saw this last days).

I am planning to implement the user interface via earphone and microphone-input. Just start the device, put into the bag and go! Then talk to your detector to operate it! Another way - but much easier to implement - would be using a small DTMF-device placed nearby a microphone. Then you can leave the laptop in your bag.


Aziz

[Berti]

hi

Damn, i cant find here accesories needed to built a coil.


Aziz look at this device: USB sound card 24-bit /96 Khz
http://astore.amazon.com/sigview-20/...621899-8944868


Berti

[Aziz]

Hi Berti,

Damn, i cant find here accesories needed to built a coil.


Aziz look at this device: USB sound card 24-bit /96 Khz
http://astore.amazon.com/sigview-20/...621899-8944868


Berti

I found on the manual following important information:
Page 13 of document:
http://www.ediroleurope.com/manuals/UA-1EX_egfis2.pdf

If the sampling frequency is set to 96 kHz, you can either record or play back (not both). Set this
switch to choose either recording or playback.

Using the 96 kHz sampling rate would not be full-duplex. Forget this device.
Not convenient. We need at least 96 kHz at 24 bit resolution with full-duplex possibility. Additional: There must not be any phase drift between output (DAC) and input (ADC) signal. For lock-in amp very critical K.O. criteria. We don't need any effects (they disturbing our measurement). Pure stereo signal will be used.

Aziz