TineFPGA-GOLD Metal detector

[SaltyDog]

Thanks. I ordered via jlcpcb and they arrived into New Zealand in 5 days .. then they promptly got held up here for 1.5 weeks caught up in a backlog of parcels and a delivery to the wrong address .. ... bahh

Still waiting for delivery ..

[6666]

the 2nd stage is a sliding-window differential amp

Is there a reference to this anywhere, not much shows up in google, trying to figure out how it works, thanks.

[SaltyDog]

Nope, you won't find that published on the net, because I invented it

All will be explained in due course ....

[liudengyuan]

[liudengyuan]

In the future, all private projects, not public projects, do not get discussion in the forum, because they are private, private, and the discussion is meaningless

[6666]

Nope, you won't find that published on the net, because I invented it

All will be explained in due course ....

Oh ok, no probs ,looking forward

[SaltyDog]

Finally got the PCB's .. have loaded the SMT components, well all but two that I am waiting parts for. Should start testing next week.
Have a great day ..

[green]

Finally got the PCB's .. have loaded the SMT components, well all but two that I am waiting parts for. Should start testing next week.
Have a great day ..

Good to see. Interested in your test results.

[6666]

well all but two that I am waiting parts for

Are they mission critical parts, not just a junk box R or C that you can just solder in to get working

[SaltyDog]

Are they mission critical parts, not just a junk box R or C that you can just solder in to get working

Nope, they are critical parts.. Should be here soon..

[waltr]

Looking forward to some test results.

[SaltyDog]

The connectors to the TinyFPGA-BX have arrived ... attached is photos of the board.

I am starting testing, although difficult, as my Workshop has had a Rat die in the walls, and the stink is unbearable .. Have had to work elsewhere.
I will see what I can get done ..

The only part I am waiting for is the LED driver, but I can do lot's of testing before that arrives ..

Cheers

[SaltyDog]

Update: Have the board working, at least detecting & discriminating metals .. (Found two errors .. which will be fixed on the MK2 version)

I am now going to do some fine tuning and get the LED array indicating detected metals once the driver arrives (RS is a bit slow at the moment) ..

[6666]

Sounds good.

[surfdetector]

Watching this one with interest.