TESORO GOLDEN SABRE

[Davor]

Your picture is not clear about what you did so far with your board. I tried to enlarge it and rotate in various ways, but I'm unable to read critical points. In case you connected capacitors in parallel, yes it can be a cause. Also if your op amps are not according to the schematic you can experience problems as you described. Problem is with some op amps that they behave completely unexpected if input voltages go beyond common mode voltages. LM358 is fine, and you can use it even as a comparator, but TL061 goes bezerk if any input goes down to negative rail.

As you'll want your rig to behave as it was designed to, it is advisable to replace those capacitors with proper values, and best choice are the non-polarised ones. You can't expect it to work properly with wrong time constants in filters. Once you fix that you'll see if the buzzing problem persists, and seek further if it does.

[golfnut]

Have you a battery or a mains power supply? If mains supply, remove and try battery. You may have lots of mains noise in your house - try it on battery in a field. Is the buzz the same frequency as a valid target tone? S

[Hornbuckle]

Have you a battery or a mains power supply? If mains supply, remove and try battery. You may have lots of mains noise in your house - try it on battery in a field. Is the buzz the same frequency as a valid target tone? S

My device is powered by the power supply for the indoor antenna 12 V (100 mA), I also have a 12 volt battery pack. I turn on the power supply to the network and the metal detector starts beeping continuously when I raised the subject of the coil then he reacts to it.

[Hornbuckle]

My device is powered by the power supply for the indoor antenna 12 V (100 mA), I also have a 12 volt battery pack. I turn on the power supply to the network and the metal detector starts beeping continuously when I raised the subject of the coil then he reacts to it.

http://www.youtube.com/watch?v=xX81eP_MDGE

video. MD

[der_fisherman]

You need to clean the flux off the PCB. I use Methylated spirits (I forget what the name is in the USA, but its cleaning alcohol, its poisonous to drink) and an old tooth brush.

Afterwards lay a piece of paper towel to get the dirty spirit away....it works quickly and effectively.

[Davor]

...I forget what the name is in the USA, but its cleaning alcohol, its poisonous to drink...

bourbon

[der_fisherman]

Bourbon might also do the job, but what a waste!!!

[Davor]

OK, the other alcoholic beverage of USA origin is aftershave. Gives you a splitting headache too

[der_fisherman]

But really nice smelling breath!!!

[Hornbuckle]

Hello, tell me this is a working version of the scheme? and the newest?

[Hornbuckle]

I have a 0.12mm wire, I can make it into a coil?

[elizeu]

Good morning,
Dear Friend,
I certainly recommend that you use the Proteus software to make your projects.
1 - Very friendly interface
2 - You can find on the internet are many projects that are made in it.
3 - You can plan and simulate their circuits directly in the environment.
4 - Easily find the full package in many torrent sites
5 - There are hundreds of videos on Youtube teaching uses it.
6 - Also it is very easy to create new components, although there is a huge library in the package.
Tabalho the area many years and know almost all the most famous software from the Tango, Pcad, Altium, Eagle etc. ..
Before anyone says anything, I am not a seller of any software ..

[sdesic]

I have a weird problem with my TGSL EDU from Silverdog
powers up and detection starts 50seconds after that.
It has 12V, 8V and -6V where it should... power is from battery 12V 7Ah

It has some issues...
low depth 1 EURO coin on 16 cm
2 EURO on 2 cm in notch mode

Posted pics on TGSL Tuning and troubleshooting
http://www.geotech1.com/forums/showt...928#post172928

Anyone ? Ideas ?
Don't have oscilloscope to track this problem down.

[paku]

i have same problem like you before!
so i play slide the coil and try to detect to coin 10cen in air 25cm then when the detection get on 25cm im off it
then i on back again try that ar any error or not when on the TGSL so dont have error i have glue it with epoxy
now i get malaysian 10cen 25cm in air

[sdesic]

Can you tell me what was error in your TGSL EDU ?
50 s delay or low depth of detection ?

You have bought it from Silverdog also ?
You slided coils to more overlap and you ajusted it to best depth (range) in air
and then you glued it ?
Do you have ALL METAL mode and DISC. mode ?