One more variant to create PI MD with reliable Fe reject

[Detectorist#1]

No. The board is under developing.

[hunter63]

Hello
Interesting project, the question is whether the detector rejects steel. Can you provide the original documentation? I am considering constructing this detector.

[Detectorist#1]

Hi hunter63,

Thank you -you find this project as interesting.
This detector not reject steel - after recognizing of the target, you have to swish from "ALL" mode to "FE" mode and check the target again. In this mode the detector reacts ONLY at steel objects. In this mode the detector works as real magnetometer - the reaction depends only from FE content of the target.
This documentation is original - no other more original documentation.

[hunter63]

Analyzing the diagrams posted, I noticed errors in the description of the connections: 4_U3? , 3_U1? , U2? , 6_U3 ? Do you have the correct diagram or original?

[Detectorist#1]

Hi hunter63,
In witch version of the diagrams you find mistakes?

[hunter63]

Description of the outputs of individual modules in version PI+M DET. BALANCE 5 REV.B

[hunter63]

I am generally looking for a diagram of a PI or BI detector capable of rejecting fine steel (rust), maybe you have some documentation

[hunter63]

Tomorrow I will mark it on the diagram, I am still interested in it, best regards

[Detectorist#1]

OK. I'm waiting for yours marked diagrams.

[hunter63]

Hello
How to read 4_U3
pin4 u3 is Vss I don't understand

[Detectorist#1]

In used program for drawing of the schematics, the first number is the number of the page where this signal is directed. The name of the signal follows this information. This is not the name of the integral circuit.

[Detectorist#1]

The name of the program is Orcad.

[hunter63]

Well, I finally understand, I stayed up until three in the morning with no effect, thank you, best regards, and you can also use a PI type metal detector that eliminates steel, do you have documentation?

[Detectorist#1]

Which additional documentation you need? The project of the PCB is under development by me. The part list also.

[hunter63]

I'm not developing my own. I need a Pi Detector diagram that eliminates small steel