Full m/lab SD2000 schematics

[aft_72005]

a men did sell two boards kit in forum thunting.com but now the forum closed.

Thank you
I thinking ZED schmatic is correct .
must be in free time redraw it with proteus .

[kt315]

Do anyone have the audio circuit section minelab SD2000 schematic diagram?

a men did sell two boards kit in forum thunting.com but now the forum closed.

[aft_72005]

I have not worked this project. I have not even opened this file. I do not have Proteus.
I hope the file will do your job.

Hello everyone.
This circuit drawn in Proteus is not complete.
Does anyone have the complete schematic file?

[zohir]

My SD2000 DIY build is now complete (following the forum schematic). Looking to optimize performance. And upgrade my machine
Is replacing the SSM2212 (LM394) with an AD797 the best input stage upgrade?

[Prince Zhakata]

Do anyone have the audio circuit section minelab SD2000 schematic diagram?

[Andrei]

Hi! I found interesting Fets DMP31D7LW-7 and DMN24H11DS (cheaper than ZVN4525G). Has anyone tried it?

[Andrei]

How do they make an automatic earth balance? You can probably do this by changing the width of the first sample(152us), but you can only configure one channel. Or additionally a microcontroller with an amplifier and two digital resistors? And where to get the measuring point? in front of a 2.2uF capacitor?

[kadir6141]

Max. Crystall 2.5 mhz
min.1.8mhz good working
power +- 5v stabill

[detectormods]

By raising the frequency you are adding more pulse repetition and your feedback to control the on off ratio is not working correctly. The negative rail is linear regulated and seems to be working fine.

[zohir]

Hi
when I measure the voltage of the power supply, I obtain -4.94v and +5.1v with a 2mhz quartz, but when I change the quartz with a value of 3mhz, I measure a voltage of -4.94v, and +6.7 v, the voltage values are normal..? and this shift between the (-) and the (+) does not disrupt the proper functioning of the op amps?

[detectormods]

Manual or automatic ground balance?

[Andrei]

"SD2000" (kinda)
-STM32F334MCU
-Digital version
-New power supply
-New front end
-ADC + comparator triggering time.

Weekends work in progress...

Cool! So maybe you can lay out a diagram, we'll discuss it.

[detectormods]

Replace the 3 earth field adjustment trimmers with digital interface pots and auto null, then it will behave better if the frequency / pulse lengths are changed, also change manual ground balance to automatic, this is easy to do with a pump the coil to the ground detector. I have made this work and just by changing the pulse timing set the detector is as good as any out there if not better.

[detecto]

"SD2000" (kinda)
-STM32F334MCU
-Digital version
-New power supply
-New front end
-ADC + comparator triggering time.

Weekends work in progress...

[detectormods]

Do not connect a SD2000 to any voltage greater that 6.8 volts as it will cause severe stress on the ZVN2106A / 2N7000 used as the voltage boost circuit, if you want greater reliability remove the device and install a ZVN2106G as it can continue functioning with greater voltage input. Push it too far and it will also blow up.