DIY TGSL STEP BY STEP BUILDING AND TESTING

[chuubaba]

I am afraid you are right.

It looks like your tgsl is mirrored, this is how the placement should look:

[ATTACH]43634[/ATTACH]

[yatahaze323]

It looks like your tgsl is mirrored, this is how the placement should look:

Placement.pdf

[chuubaba]

i made the board myself.
Here is view of the schematic i used now to compare. Its from this website.
Here is the part of schematic showing position of IC 4024
Here is the PCB design i used to make my board
Here is how position of 4024 was given in PCB design.
Here is my TGSL board
Compare the IC connections given in schematic with IC position given in PCB design and you will know. And this is illustration of just one IC. I have checked four so far and same is case with all four.

I am having a hard time believing your responses. Did you solder parts to the copper side of the board? Front side? Show pictures before doing anything else.
Where did you get the board? Make it yourself?

I can't decide if you are trolling us or trying to win a prize for the most incompetent newbie of the year award. If your goal is to own a metal detector, buy one. I am done with trying to help you.

[rickb]

I am having a hard time believing your responses. Did you solder parts to the copper side of the board? Front side? Show pictures before doing anything else.
Where did you get the board? Make it yourself?

I can't decide if you are trolling us or trying to win a prize for the most incompetent newbie of the year award. If your goal is to own a metal detector, buy one. I am done with trying to help you.

[Tibuck19]

I just discovered that all ICs on my TGSL are placed wrong . I have discovered this after reading the schematic. All IC are correctly positioned only if i solder them on solder side of the PCB and this has its own challenges so i will rather build a new PCB. If you have a tested and working TGSL pcb design (single sided without any SMD) then pplz share with me.

After the 15th, It might just be easier getting a TGSL-EDU board from Silverdog

[chuubaba]

I just discovered that all ICs on my TGSL are placed wrong . I have discovered this after reading the schematic. All IC are correctly positioned only if i solder them on solder side of the PCB and this has its own challenges so i will rather build a new PCB. If you have a tested and working TGSL pcb design (single sided without any SMD) then pplz share with me.

TGSL 101
An introduction to the “Tesoro Golden Sabre Light”
page 19

If you have a dual trace oscilloscope, read on!
Advanced Nulling Methods
1. Connect the “A” channel of scope to U103 pin 5. - Set scope to DC setting.
2. Set the GB pot to the mid range position.
3. Start with coils apart and start to overlap.
4. Continue increasing overlap until the the D.C. Signal on Pin U103 pin 5 is 0 volts. Check the
phase relationship between J1-1 (Tx signal) against U101 pin 7 (Rx signal). If resonant
frequencies are correct, the Rx signal will now be lagging the Tx signal by approximately 20º .

[ATTACH]43622[/ATTACH]

[daluka]

TGSL 101
An introduction to the “Tesoro Golden Sabre Light”
page 19

If you have a dual trace oscilloscope, read on!
Advanced Nulling Methods
1. Connect the “A” channel of scope to U103 pin 5. - Set scope to DC setting.
2. Set the GB pot to the mid range position.
3. Start with coils apart and start to overlap.
4. Continue increasing overlap until the the D.C. Signal on Pin U103 pin 5 is 0 volts. Check the
phase relationship between J1-1 (Tx signal) against U101 pin 7 (Rx signal). If resonant
frequencies are correct, the Rx signal will now be lagging the Tx signal by approximately 20º .

[chuubaba]

Rickb I will conduct fresh test and share pictures so you can look in to it. I am very thankful for your attention and response. stay with me

Is the variable adjustment for the time base switch in the calibrate position?
The tx freq is about 14 KHz or about 70 microseconds per division...............

[rickb]

.5 ms per cycle is 2 KHz. very unusual but not impossible. Is the variable adjustment for the time base switch in the calibrate position? it should be.

Do you have a working transmit coil hooked up to the tx terminals. Is the gnd clip of the probe connected to the gnd terminal of the coil?

The tx freq is about 14 KHz or about 70 microseconds per division.

[chuubaba]

i hooked the probe as directed by you. my scope displays wave much widers than one big square. As i set it to 0.5mS then it is exactly one big square width.

91 hz should not be present anywhere on the board. Either something is very wrong with the board or your scope is malfunctioning or seriously out of calibration. It is up to you to figure out which before you go further.

Most scopes have a 1Khz reference square wave terminal on the front panel. hook a probe to it and set the time-base switch to 1 ms/div. Each full cycle should be 1 major division. If not find out why before going further.

[chuubaba]

Karl you did a great job. I will get you free beers if you come to my country.

[Carl-NC]

I cleaned out the OT discussions. See "FET switches" in the Tech forum and "TGSL Wireless" in the TGSL forum.
It took me about 20 minutes to re-read this entire thread, figure out which discussions went where, get all the posts moved, delete the remaining banter, and type this reply. That's 20 minutes of wasted time for me.
PLEASE START A NEW THREAD FOR OTHER DISCUSSIONS. Thanks.

[dbanner]

IMF

[chuubaba]

The problem is with payments. Although i have business accounts and import export permits etc but those are for commercial transactions only else audit can grill me. Besides we are now in grey list of countries that means more restrictions and higher costshttps://www.brecorder.com/2018/06/28...-in-grey-list/

You must have spent a fortune on components so far, so why do you want to get the books for free?
Just go to Amazon and buy a copy -> https://www.amazon.co.uk/gp/offer-li...1088692&sr=8-1

[dbanner]

Also, truly Rich people don't like to get anything illegal for Free. They much rather pay for it.
Only the truly poor folks look for ways to get access to privilege high knowledge of elite class
Ironically, this does not affect the overall sales of item
The rich will always buy genuine item