TGSL v3 100mm x 100mm reduced

[yatahaze323]

Hey Everyone,

I decided to make a TGSL as my first homemade detector. I noticed that many pcb printing companies offer very good prices for boards that are 100mm x 100mm or under however the all the boards for the v3 TGSL on the forum were just over 100mm x 100mm.

I believe I found a copy of the Sprint Layout file for the version in the Sticky post in this project from this post. I have no experience with Sprint Layout but I made a few changes to board which involved reducing the left side of the board. I used the test feature in Sprint Layout and I didn't find any issues with the board.

Could you all take a look at the pcb below and let me know if the changes I made looks like it would work?

[BKY1337]

Which changes did you make?
Have you only removed a part of the copper area?

[yatahaze323]

Yes I only removed the extra copper areas. I removed some more of the copper cause I wanted to include mounting holes on the board, check it out below.

[BKY1337]

Nice work. I dont like the square holes (solderpads).
Im not sure if this copper area is useful for something.

I think you can drill through it too. Its only GND.

You could make some connections as second layer (yellow one) to make it even smaller.

My problem is that i dont know how to connect a second layer (yellow) with a first layer(green).
I have used the test tool but it doesnt show me the connection.

[yatahaze323]

Changing the square holes to circle ones was an easy fix. But I don't trust my skill level to make additional changes to the actual layout of the board. So the zip file below has the gerber files with the drill data and the layout file with the extra copper removed and the square holes changed to circles.

[BKY1337]

Dont forget to make through holes. And thanks for the files. I will change them a little bit.
Please tell me how they work when you have finished your board.


EDIT: Now i know what my problem was. The yellow layer is not a copper layer.
Then you dont need through holes. But its better for pcb service.

[yatahaze323]

Thanks for letting me know that the design was missing through holes! I corrected everything and the new file has the corrected gerber and layout files for anyone else that may want to use it.

[BKY1337]

Your yellow connections are not copper. You should make them in the blue layer , this is the second layer. Otherwise you will have to set the bridges by hand.

Im working on the Silverdog Version.

Do You think i can use a trimmer for GB-Pot?

[BKY1337]

What does this second trimmer at the board?

[BKY1337]

Can somebody help me. Are this electrolytic capacitors in the right direction?



Why is + at GND?

[Nandor]

Yes they are, the capacitor on the upper right corner is on the negative voltage so the positive side must go to ground or battery minus and the negative side to the negative voltage rail. Here the battery voltage minus side is a virtual ground.

[BKY1337]

I dont really understand this. But you say that this schematic is OK?

Negative Voltage does not destroy the capacitor in the wrong direction?

[Toros]

Nandor speaks of a virtual ground (-V in scheme). It is different from the negative power pole.
The cap is connected correctly.Look in the scheme where VT6 and VT7 are located as well as C23=220 microfarad. The virtual "gnd" is formed there

[BKY1337]

Thanks! I hope the rest of the layout is ok too.

[Nandor]

I have made some prototypes that don't really work as they should, but it a good learning procedure. Don't be afraid, if it won't start for the first time try to find the problem and this way you will understand how it works and why it's not working. Before you order PCBs make sure that the pcb you made is a working one.