central needle vu-meter

[AK48]

Hello , i received a metal detector which i think is chinese made using old technology with center needle vu meter like the VLF-TR 770D from C-Scope ,trying to fix it , i just would like someone to explain me the operation of the pseudo-analytical vu-meter with deviation to the left for ferrous and to the right for non-ferrous which is only a kind of visual discri, how is designed the stage which keeps the needle in the centerThank you

[Op04]

Hello AK48,

What you looking for is analog VDI, check this out!

[dbanner]

Hello , i received a metal detector which i think is chinese made using old technology with center needle vu meter like the VLF-TR 770D from C-Scope ,trying to fix it , i just would like someone to explain me the operation of the pseudo-analytical vu-meter with deviation to the left for ferrous and to the right for non-ferrous which is only a kind of visual discri, how is designed the stage which keeps the needle in the centerThank you

[ATTACH]56803[/ATTACH][ATTACH]56804[/ATTACH][ATTACH]56805[/ATTACH][ATTACH]56806[/ATTACH]

You're in luck. There are schematics in a zip file in last post.
https://www.geotech1.com/forums/show...light=Micronta

[AK48]

hello and thank you dbanner , amazing , it's the same MD and from now i'm lucky luke , have a good day
regards