TineFPGA-GOLD Metal detector

[SaltyDog]

Thanks.

By the way, because my machine does not have any integration, I don't need a pinpoint button, I can pinpoint all the time ..

[ricalbertvig]

I hope everything goes well attentive to your publications

[SaltyDog]

Hey Guys.

I have finished the PCB. Does anyone know of a good/cheap PCB manufacturer in the US or UK?
I usually use SEEED Studio in China, but their shipping is non existent still after Covid-19 ..

Cheers

[Qiaozhi]

Hey Guys.

I have finished the PCB. Does anyone know of a good/cheap PCB manufacturer in the US or UK?
I usually use SEEED Studio in China, but their shipping is non existent still after Covid-19 ..

Cheers

Try https://jlcpcb.com/
I probably wouldn't trust having the boards shipped by China Post, but DHL should be ok.
More info here ->
https://support.jlcpcb.com/article/1...717.1583982151

[Mdtoday]

Hey Guys.

I have finished the PCB. Does anyone know of a good/cheap PCB manufacturer in the US or UK?
I usually use SEEED Studio in China, but their shipping is non existent still after Covid-19 ..

Cheers

be prepared for a 2-3 week delay from either Jlpcb or Pcbway into our neck of the woods SaltyDog.
Things are heating up on the political side and you might be best to wait and see what transpires over the next week or so until the air is bit cleaner.

cheers

Mdtoday

[bklein]

Is there an “off the shelf” coil fast enough to use for this project?

[SaltyDog]

HI All,

Thanks for the feedback regarding PCB manufacturer ..

Is there an ?off the shelf? coil fast enough to use for this project?

Not sure yet, will do tests once I have my new hardware built ....
I did have an "off-the-shelf" coil that I had bought years back (don't ask me where) and that seemed to work ok with my gold ring, not sure about small gold.

I will be doing a raft of tests when I get the hardware going ...

Here is what the board looks like .. all components are 1206 or bigger ... my eyes are getting old

[6666]

Are you selling the pcb pre made,you lost me with smd

[SaltyDog]

As mentioned several posts back I will be selling as a kit .. (pre-made)

[6666]

Do you have an aprox price yet ?

[SaltyDog]

Not yet.. Don't even know what everything costs yet..

[liudengyuan]

Regarding pre-amplification, are we choosing differential amplification or instrumentation amplifier more reasonable? Please give your suggestions, or give an excellent pre-amplifier circuit, thank you

[SaltyDog]

I am using a two stage pre-amp, the first to give give a 0..3v output, the 2nd stage is a sliding-window differential amp that allows me to further amplify just a portion of the wave form from the 1st stage ...
Hope that makes sense ..

[Qiaozhi]

Try https://jlcpcb.com/
I probably wouldn't trust having the boards shipped by China Post, but DHL should be ok.
More info here ->
https://support.jlcpcb.com/article/1...717.1583982151

I ordered 5 PCBs from JLCPCB on the 21st May 2020, and received them on the 30th May 2020.
Only 9 days from start to finish. From China to the UK using DHL Packet European. It was shipped via Germany, which is the European distribution centre.

[eclipse]

Similar here for order made in May 11th. Good thing is that I didn't have to deal with DHLs customs procedures.