Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Folks i need some schematic for metal detector...

Status
Not open for further replies.
D

djape

Newbie level 5
Joined
Feb 8, 2013
Messages
10
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,367
Hello everybody,

I can't find anything about mcCheck sx 3300profi metal detector, except the price of the device.

I would appreciate any kind of help for this issue.
The problem is that the detector's coil has been broken from the body and the person who tried to attach the coil, somehow replaced the wires from the coil probe. By default those two things are attached with 5 pins connector (that is how they explained to me on the phone..). I don't have pictures yet of whole system, but soon i will have and i will post them.

If any of you has some experience with this or similar detectors, or can give me any kind of direction to fix this problem i would be very thankful....

Thanks.
 

The usual basic principle is described as two coils, with a high frequency going through them. If you bring a metallic (or perhaps conductive) substance close, it changes the frequency in one coil, enough to create a beat frequency between them (or some kind of reading).

Yours needed repair. If one coil is wired incorrectly, then the interaction between the coils isn't right. You may need to try different wiring arrangements, to find the one that works.

I could be wrong about certain details.
 

If it has 5 pins connector i suppose that there are 2 ends of each coil and the 5th is GND, common etc.
As i think there should be something like this:
The coil with bigger numbers of turns should have more resistance and due to high frequencies from primary coil,the primary should have less number of turns.
If there is detected some conductive "thing"" it would induce eddy currents in it, and mutual inductance is automatically changed., so on the other end there is change also in the induced frequency on the secondary, receiptent coil.

Measuring the resistance of the coils somehow i can figure out which is which, but i don''t see how to determinate which wires on the other side are for each coil?

Thanks for answering...
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top