Replies to Minipulse Plus

[Qiaozhi]

hi
which software need to open your pcb file?
it have discrimination ?

I have not posted the PCD CAD files. But for the record, I used Easy-PC.
The Minipulse Plus is a PI, so it does not have ferrous/non-ferrous discrimination. However, by adjusting the Reject pot, you can eliminate small foil and pulltabs.

[mohandes]

I have not posted the PCD CAD files. But for the record, I used Easy-PC.
The Minipulse Plus is a PI, so it does not have ferrous/non-ferrous discrimination. However, by adjusting the Reject pot, you can eliminate small foil and pulltabs.

thanks
i think work like chance pi , so is it deeper like 2box ?

[Qiaozhi]

thanks
i think work like chance pi , so is it deeper like 2box ?

If you've been reading about Chance PI, then you'll know its claimed discrimination capabilities are less than spectacular.
The Minipulse Plus is not designed for very large rectangular coils. You would need to make some modifications to use it in that way.
A 2-box detector is something completely different.

[Qiaozhi]

It appears that this error was in fact flagged by the DRC report, but I missed it (human error ) as a result of modifying the PCB footprint for the cermet trimmers to add a 4th pin. This extra pin produces a number of clearance errors because of the copper track embedded in the footprint, and the track-to-track error near Q4 was buried in the list.

Embedding a copper trace in the PCB footprint is apparently not the correct way to include duplicate pins in a PCB symbol. Since then I've discovered how to handle these in the library component without any DRC issues, which makes life a little easier.

When the kits become available from Silverdog, the PCBs will have been upgraded to REV-B, so you won't have to worry about correcting any of the errors present in REV-A.

[Koala]

Hi Qiaozhi

Well done for the hard work on the MiniPulse Plus. Looks like it moving forward very quickly

Have you had time to compare with other detectors i.e does this project have the edge over the Baracuda or Surf PI or is it about the same.

A quick video would be much appreciated

[Qiaozhi]

Hi Qiaozhi

Well done for the hard work on the MiniPulse Plus. Looks like it moving forward very quickly

Have you had time to compare with other detectors i.e does this project have the edge over the Baracuda or Surf PI or is it about the same.

A quick video would be much appreciated

I haven't tested a Barracuda, but compared to a Surf-PI the depth is about the same. However, the Minipulse Pulse seems to be more stable, has a slow self-adjusting threshold (SAT), VCO audio, and a battery warning circuit. Whereas the Surf-PI has a single tone audio that changes in volume depending on the depth of the target, and needs manual threshold adjustment.

I'll leave the video creation to Silverdog.

[sinclairuser]

thanks this is the last detector i'm going to build( you can only use so many), as i dont agree to selling these when compleated i have to stop.

[Koala]

thanks this is the last detector i'm going to build( you can only use so many), as i dont agree to selling these when compleated i have to stop.

Will you the urge to build the GoldScan be too great when the project is ready

[sinclairuser]

no need for gold detector.
minipulse will do for me ,i only want to build that as its one of eric's designs, and has the edge on the barracuda.

[satdaveuk]

no need for gold detector.
minipulse will do for me ,i only want to build that as its one of eric's designs, and has the edge on the barracuda.

Haha we dont know yet till we built it
But like you Sinclair will be building it with positive thoughts and baited breath

Is there any chance of putting the latest silverdog lay files on here for those who want to make there own circuit boards?
Thanks in advance
Regards

[Qiaozhi]

Is there any chance of putting the latest silverdog lay files on here for those who want to make there own circuit boards?
Thanks in advance
Regards

I'm currently waiting for Silverdog to replicate the final design before updating the files.

[satdaveuk]

I'm currently waiting for Silverdog to replicate the final design before updating the files.

Your a Star, Thank You

[satdaveuk]

I been trying to look at the gerba files In the sticky, tryed eagle sprint designspark easeypcb etc, Do I need something different?
Just wish they would use a common format between themselfs it would save so much hassel.
Maybe here in Geotech we should show a example and all use same format.
I dont care which one it is what ever you all deside I will go along with.
I jumped the gun you say easy pc top of this page so will download the demo and see what happens
Regards

[Qiaozhi]

I been trying to look at the gerba files In the sticky, tryed eagle sprint designspark easeypcb etc, Do I need something different?
Just wish they would use a common format between themselfs it would save so much hassel.
Maybe here in Geotech we should show a example and all use same format.
I dont care which one it is what ever you all deside I will go along with.
I jumped the gun you say easy pc top of this page so will download the demo and see what happens
Regards

The Gerber files contain G-codes that the PCB manufacturer uses to make the boards. These are not layout files.
You can view the Gerber files using the open source "Gerbv" Gerber File Viewer. This is a native Linux application.
For Windoze, there is apparently an experimental beta version.

Failing that, you could try GerberLogix for Windoze, which is also free.

[eogeo]

Are there any guidelines or rule of thumb for selecting the types of non-electrolytic capacitors in detector circuits and are some types more suited to some parts of the circuit than others? The parts list suggests poly. capacitors and I was looking at purchasing the poly caps in the attached images but noticed that different looking caps had been used in the image in post #27 which seems to suggest that more than one type of capacitor would be suitable. In searching for caps I have also come across ceramic NPO/COG types that look like they could be suitable for some areas, are they worth considering? Thanks.