PI Detector Project finished

[kt315]

Tim the small detector is from Moreland and Overton book.
corrected.

[Tim]

Tim the small detector is from Moreland and Overton book.
corrected.

Thanks KT. Yes I have the 2015 version.

[bernte_one]

Tim the small detector is from Moreland and Overton book. I made a pc board, it works but it doesn't set the world on fire. I found a couple of mistakes on the pc board layout. The jumpers installed corrected the problem. I have been having fun with the Hammerhead board which I purchase from WM6. I guess I am from the old school that say's my brain can be a better judge of a target than a pic chip. I have a VLF machine with a 8 bit processor in it, I just don't trust the machine. Thanks for asking Tim, Best to all Jim

hello James, please be so kind i shows us the corrections on the layout

espacially i biten out my teeth on the pi-5 project

[Qiaozhi]

espacially i biten out my teeth on the pi-5 project

Bernte - Did you miss this post from May last year? -> http://www.geotech1.com/forums/showt...533#post234533

[James]

Thank you for answering the gentleman's questions, I posted my corrections on the board an was greeted with very unpleasant comments. Thank you again Best to all Jim

[James]

Tim I just checked my book was copy right 2012, I believe that was the first book. Best to all Jim

[Qiaozhi]

Tim I just checked my book was copy right 2012, I believe that was the first book. Best to all Jim

Yes, that's the First Edition. The Second Edition had a "corrected" version of PI-5, but unfortunately [again] there was a different error. The link above should correct that problem.

The original prototype was somewhat different to the version printed in the book. It was modified to be consistent with PI-1 to PI-4, and supposed to have been built and tested as a working unit. Somewhere along the line, things went awry and the schematic ended up with some errors.

One day I will turn this into a proper [working] project for the forum ... one day.

[6666]

Thank you for answering the gentleman's questions, I posted my corrections on the board an was greeted with very unpleasant comments. Thank you again Best to all Jim

Jim what does this mean ?, I have been back through your 55 posts and could not see where this happened.

[James]

I built the PI Detector from the 2012 edition of the Metal Detector book, I posted my finding of the errors or mistakes on the printed circuit board. The post lasted about 30 to 45 minutes an was gone. I did not use any foul or abusive language. I have no idea who or why it was removed. At this point in time it is a mood point. I still think that this a great board, an enjoy all the folks. Best to all Jim

[bernte_one]

hi James, please be so Kind and post a Picture of your board layout here

we can end this mystic, for now and ever

[Qiaozhi]

I built the PI Detector from the 2012 edition of the Metal Detector book, I posted my finding of the errors or mistakes on the printed circuit board. The post lasted about 30 to 45 minutes an was gone. I did not use any foul or abusive language. I have no idea who or why it was removed. At this point in time it is a mood point. I still think that this a great board, an enjoy all the folks. Best to all Jim

Your post would not have been removed without an explanation, and certainly not for providing some useful information. If it had contained spam, or some other undesirable content, then you would have also been banned.

Was it by any chance your first post in the forum? If it was, then any posts that contain attachments or links are automatically put into moderation, and need to be approved by Admin before appearing in the forum. Occasionally we do miss one of these posts, and it stays in moderation for ever. Otherwise I've no idea what happened.

[James]

Picture

I have posted a picture of the board, as I remember there were 2 capacitors, need to be installed, a trace on the IC was incorrect and the transistor pin layout was incorrect. Please can we move on to more interesting issues. This will be the last comment about the little detector. Best to all Jim

[James]

Thank you Qiaozhi for the comments, what ever the reason it's over an we need to get on with more interesting subjects. Thanks again. Best to all Jim

[Qiaozhi]

I have posted a picture of the board, as I remember there were 2 capacitors, need to be installed, a trace on the IC was incorrect and the transistor pin layout was incorrect. Please can we move on to more interesting issues. This will be the last comment about the little detector. Best to all Jim

Which PI design are you referring to?
I assume it's either PI-1, 2, 3 or 4, as there was no PCB layout supplied for PI-5.

Also, please check the errata list for Edition 1 here -> http://www.geotech1.com/forums/content.php?143-updates
Note 10 states: Page 177, Figure 12.21 - PI-1 PCB Layout - the silkscreen is incorrect for Q3.

[James]

Thanks Qiaozhi, I built the PI-1, and will have fun check my copy of the book. I had fun build the detector and it works . Thanks again for the info, Best to all Jim