LOOKING FOR GOLDSCAN 4 Schematic.

[Jose]

I think it should, measure the current consumption, which should be 200 to 250 mA.
The voltage should not be too high 15 or 16 volts, with those values and a good heat sink in the regulator, should not have problems. The scheme indicates 3.5 ohms for the coil, see the first page, scheme published by KT315 https://www.geotech1.com/forums/atta...6&d=1123969824

[TufaN]

For the case of Q9 and Q10, the "S" terminal is connected to ground or GND. The attached diagram is correct, although there could be some error.[ATTACH]44349[/ATTACH]

Greetings and regards jose.
I suspect your goldscan 4 in this photo.
between the scheme here and your goldscan pcb array j113 s different connection.
Drain pins on the diagram are connected to the integrated. but drain on the pcb is shelf. is the correct connection?

[6666]

Greetings and regards jose.
I suspect your goldscan 4 in this photo.
between the scheme here and your goldscan pcb array j113 s different connection.
Drain pins on the diagram are connected to the integrated. but drain on the pcb is shelf. is the correct connection?

Your attachment seems to be missing, but Source & Drain are interchangeable on J113

[TufaN]

[QUOTE = 6666; 260390] Your attachment seems to be missing, but Source & Drain are interchangeable on J113 [/ QUOTE]

[6666]

The data sheet says
"J111 / J112 / J113 / MMBFJ111 / MMBFJ112 / MMBFJ113N-Channel SwitchFeatures• This device is designed for low level analog switching, sample and hold circuits and chopper stabilized amplifiers.• Sourced from process 51• Source & Drain are interchangeable"

[kt315]

some data sheets say nothing

[TufaN]

Because I don't speak English. I guess what I mean is not understood.

Is it right to my damask. or pcb that has been lined up correctly. which layout works

[Jose]

It is the image of my GS4.
The fet used, is the BF245A. The terminals are connected as shown in the image below.

[TufaN]

It is the image of my GS4.
The fet used, is the BF245A. The terminals are connected as shown in the image below.[ATTACH]47346[/ATTACH]

Jose I get it now. Thanks very much for the return.

[TufaN]

hello jose. I'd like to know one more thing. Alex has drawn both schemes. which one is right?

[Jose]

Alex's original scheme does not include the GND connection of the fet.
Two 470K resistors were added on both channels.
A 220K resistor was replaced by 22K.
Use the scheme indicated below, it is the one that works on my GS4.

[kt315]

see the first page, scheme published by KT315

---
Jose
i have 2 files in DipTrace and see in its header an authour 'Jose'. this are you done?

[Jose]

see the first page, scheme published by KT315

---
Jose
i have 2 files in DipTrace and see in its header an authour 'Jose'. this are you done?

The two schemes that I published in diptrace, correspond to Goldscan 5, The first part and the audio, are very similar to the Proto scheme published by Altra.
I have a functional prototype, but the schemes and the pcb are not complete or updated.

[TufaN]

thanks jose. a short video of my first tests

[ahmad mosa]

Hello friends, I want to make the Golden Scan metal detector two-tone. I want you to make the right scheme