The Moodz detector lives !

[serci78]

Thank you moodz
moodz detector there is also information here
http://australianelectronicgoldprosp.../moodz-pulsar/

[soverey]

The building document looks well structured, good idea for pluggable frontend module , it leaves room for later developments

[greylourie]

Yes, most excellent. Very good to have all the info in one document. There are some good examples by Geotech members and admin, too. Another I looked at just recently (by DBFlowers?), was linked to by Koala in response to someone asking for coil build info. So useful, whenever someone has questions.

[moscadondres]

Why i can't open the Moods pulsar on australian,i am interesting by your detector,regards.

[soverey]

Any progress on the building document?

[moodz]

Why i can't open the Moods pulsar on australian,i am interesting by your detector,regards.

Hi ... the pulsar detector was only a "mind experiment" ... it is not this thread. It should be visible on the other site ... ( not sure if I am allowed to link to it :-| )

[moodz]

Any progress on the building document?

I have been experimenting with an auto ground cancellation system ... but that is another story ... I have the "backend" completed ( this is all the power supplies, sampling, control, drivers etc ) .... see below.

I just need to put an edge connector or something so that different front ends can be plugged on.

See below ... This is the current board ... I have just snipped the front end off so you can see what the back end will look like.

The board size is 8cm x 8cm ... all the parts are surface mount except for the micro so it can be replugged / upgraded etc.

[moodz]

Hey guys ,
I wanted to know whether using two or three power Mosfets in series is a right thing to do,
I simulated this topology and I want to use two C2M0280120D Power mosfets.it's 1200v Vds and !0A Id and 22mOhm Rds(on) with 24ns Reverse Recovery time and falling time of 21ns.

I want to switch from a 48v li-ion battery separately.
what's your opinion guys? could you help me in the driver design?
you all seem to have many experience in PI.
I want to design a humanitarian de-mining device.

DONT OPEN THIS LINK ...its bogus ( maybe this user needs to be edumacated :-) )

[soverey]

I have been experimenting with an auto ground cancellation system ... but that is another story ... I have the "backend" completed ( this is all the power supplies, sampling, control, drivers etc ) .... see below.

I just need to put an edge connector or something so that different front ends can be plugged on.

See below ... This is the current board ... I have just snipped the front end off so you can see what the back end will look like.

The board size is 8cm x 8cm ... all the parts are surface mount except for the micro so it can be replugged / upgraded etc.



[ATTACH]34024[/ATTACH]

Thank you for the update , board looks pretty compact, sorry I can't offer more technical comments, advice. Looking forward to see how the projects evolves.

[Old cart]

I have been experimenting with an auto ground cancellation system ... but that is another story ... I have the "backend" completed ( this is all the power supplies, sampling, control, drivers etc ) .... see below.

I just need to put an edge connector or something so that different front ends can be plugged on.

See below ... This is the current board ... I have just snipped the front end off so you can see what the back end will look like.

The board size is 8cm x 8cm ... all the parts are surface mount except for the micro so it can be replugged / upgraded etc.



[ATTACH]34024[/ATTACH]

Board looks good. Is it possible to get a little more contrast and/ or less overlap between the part nomenclatures? It is a bit hard to read. I like the use of multiple caps in parallel to lower ESR/ESL. Would there be any befenefit of adding a film cap in parallel with each bank to lower the high frequency impedance, or is this not necessary?

[soverey]

As soon as a pcb file and list of materials is ready , I would like to give it a try.

[DanWho]

Did this project die out due to difficulties of making surface mount boards and parts, or just trying to source non-surface mount parts? Any progress in any direction?

[moodz]

Did this project die out due to difficulties of making surface mount boards and parts, or just trying to source non-surface mount parts? Any progress in any direction?

No .. not at all ... I was not satisfied with the ground balance system and as a secondary consideration the TX pulse efficiency. A novel ground cancellation system is being tested and the TX efficiency is also working ( its about 90% efficient in air ... drops about 5% in mineralised ground ). Once the testing is done I will roll out another board layout.

[BILLY]

No .. not at all ... I was not satisfied with the ground balance system and as a secondary consideration the TX pulse efficiency. A novel ground cancellation system is being tested and the TX efficiency is also working ( its about 90% efficient in air ... drops about 5% in mineralised ground ). Once the testing is done I will roll out another board layout.

That is great news Moodz! So you should have a good machine by the years end, right? Even better than any machine on the market. How are the coils coming along?

[moodz]

Hey Billy, Your Also Welcome, Another Nice, Kind, Encouraging Response.