Universal PI Micro

[aussie280]

OMG I've just read this thread from the begining and other associated _ED threads. What a very big shame and loss to the general DIY guys and girls. This was something I'd liked to have built. The story of Tucker cars spring to mind.

[turboaleks]

Yes kt315, its sad.
This man gave us so much information, even source code, so that we could play around with it. I still read his old postings in this forum and in the other mentioned by you for better understanding.

[kt315]

http://australianelectronicgoldprospectingforum.com/ a forum has dead, the authour has left the project be cause massive aggressive attacks and behaviours by minelab
trolls' side. no perspective here for the genius people, trolls are feeling themselves here like the masters of universe. you are not able to delete those vandals because they do not contempt the forum rules and they are english speaking gentelmen. the trolls have twined here the nest of aggressive poisoned serpents they are of. that is capitalistic crazy world that slowly disapearing in a gorge of the asiatics dragon with nothing patent rights and nothing of gentelman rules. wait maybe Andy_F ll give some PI with disc for this world... no more who can :/

[mohandes]

very well.any body make this project?

[mo.sanaiy]

hi i am cyrus from persia
i want make metal detector universal pi micro and I'm confused Please tell me how deep excavations showed that the detector can??????????
and i have not hex file please upload hex file?????????????? and please upload Complete Series PCB this metal detector!!!!!!!

[serci78]

hi all could you give me some assembly codes please? And I want to make a discriminate on lcd screen. Can you help me please. I want to print adc....

[sido]

http://www.seeedstudio.com/depot/fus...html?cPath=185
I've used these guys with good results. Only $30 for TEN 100mmx100mm double sided, through-hole plated, silk screened, delivered. I couldn't even buy the materials to make ONE board for that price locally, and of course even if I did it as you say, it would be nothing like the quality. $3 a pop, gotta love globalization.

Midas

Hi Midas, that is a great price/per devolpment board...Have been looking local here in Au and does not come close to what you have posted. Very thankfull.
Will keep that in mind.

Cheers Sid

[Midas]

This first attempt is a double-sided board, and it probably needs to be manufactured, unless you have experience with making double-sided boards. I've got a quote, for just one board on it's own is about US$70. That's the minimum, and I'll be making at least one for myself. Subsequent boards are much cheaper - for example, if 6 people want one, the full cost per person is US$25.00 That's for a solder-masked, silk-screened, through-hole plated, double-sided FR4 1/2oz copper board - better quality than anyone can hand-make. But it IS doable, if you've got experience. I've tried to minimise double-sided traces where possible.

http://www.seeedstudio.com/depot/fus...html?cPath=185
I've used these guys with good results. Only $30 for TEN 100mmx100mm double sided, through-hole plated, silk screened, delivered. I couldn't even buy the materials to make ONE board for that price locally, and of course even if I did it as you say, it would be nothing like the quality. $3 a pop, gotta love globalization.

Midas

[Pete the Builder]

I've done something!

For anyone watching, I've just unraveled the coil/preamp schematic. It's attached below.

I've got a PCB design in the works, just roughing things out right now, so if anyone smarter than me (i.e. pretty much anyone at all) could cast an eye over the schematic and post any issues here, that would be great. This was a complete mind****, the lines connecting the inputs of the two op-amps started to merge into one... I don't know how many times I wired up the wrong pin 2 to the wrong pin 6! Argh! And the resistors! Aaaaah!

I've posted the original schematic as well, just to have all the material in a single place.

At this stage, I'm again working on a double-sided PCB, with all through-hole components (THCs - hee hee). If someone is desperate to not have a top-quality board to play with once the design is finalised, I might be able to actually do this single-sided.

And if anyone wants to use BW's original PCB, of course I would be happy to regenerate that as well as a .pcb file for future generations! Just say so.

I hope this gives a little kick forward into BW's brain before he made the Q-know-what...

Questions, comments, and suggestions welcome. Money, too.

-PtB
P.S. Boy oh boy the latest Adobe flash update is playing havoc with the attachment manager and uploader. Took me 4 tries before it worked. God I hate flash...
First, the original :
PtB Slot Board - Coil Schematic.pdf
Next, the updated version :
CS 2013 Coil & Preamp.pdf

[Pete the Builder]

It's done. Anyone who would like to help by verifying my schematic please contact me by PM, and I'll provide the schematic. If you don't have the other schematic, it's available "in the wild". Beware of imitations!

FYI, There Be Dragons. The legality is all up in the air at the moment, but you may risk serious legal action if you choose to get involved. Sorry, I don't understand it fully myself, and I don't make the rules. Enter At Own Risk. Beware Of The Dog. Trespassers Will Be Composted. Etc.

Goody, now I can start the UPIM switched-cap daughtercards, which is what I was doing before I got interested in the other design.

Oh, yeah, there's no PCB yet. One thing at a time. My brain hurts right now.

And the banker's been. Looks fantastic (woo hoo!) but it can take up to 5 days before we know whether or not the bank's going to give us the opportunity or not. Fingers crossed.

Now, back to illuminating someone else's better design. I do feel like a 11th century monk highlighting and illuminating things he doesn't fully understand... but working with the schematics helps!

[Pete the Builder]

Corrected UPIM Motherboard Schematic FEB2013

OK, here's the actual, corrected schematic.

Note that the internal font Altium uses does get better with expansion. 'Course, it doesn't help when your medication gives you binocular diplopia (each eye sees two slightly offset images...)

I'll hopefully be working on the daughterboards tomorrow (Tuesday). Fingers crossed!

Cheers,
PtB

UPIM Schematic 1.02 Feb 2013.pdf

P.S. I can't seem to delete the original using Chrome on Win7 x64, the forum software's uploader goes crazy. When I get on the laptop, I'll update it. Thanks!

[Pete the Builder]

I forgot to add a huge "thank you" to mickstv for catching a massive error on my part, and preventing a lot more pollution from magic smoke! So
Thank You, mickstv!

I owe you at least one beer!

Ah well. Hell, if you're gonna make a mistake, make it a big one, right? And it wasn't even a footprint or component problem, just a part comment that would've sent builders astray... Sigh.

Oh, OK, I've just found out I can't edit old posts, so I've pulled that document, and I'll post an updated copy below. Gngngngngnnnnnn!

Anyway thanks to everyone for keeping an eye out on me!

-PtDB

*D as in "dodgy"!

[joop]

Pete, thanks for reviving this project! I will keep an eye on it, might have a go at it eventually... Hope you will succeed in creating single boards for this project.

[Tinkerer]

Hey guys, the one thing that is amiss here, is that nobody congratulated Pete for his great job and thanked.

Thank you Pete, for all your effort and sharing it with us.

All the best

Tinkerer

[moscadondres]

Hi mickstv,can you tell the value of vr2,thank you.