SBG-PID

[Koala]

Returning to topic, after examining the schematic a little more intensely, I noticed that NE7555 audio chopper is VCO circuit? No, it looks like it's configured as monostable, triggered by pin 6 of 4538. I don't think that I've seen this before on other pulse circuits. Would this be to keep everything nice and synchronized? This schematic is all over the place. The schematic must be redrawn. And no layout.
No YouTube video to demonstrate performance? No testing on real ground?
Nothing but unverified schematic with little or no description of parameters, timings etc.
No thanks. This one will need a lot of work.

links on page one work
layout over on thunting you have to register to download
YouTube of Air test

old project YouTube posted in 2012

[dbanner]

Koala, this is not same schematic, this is SBG-PID, not SBG-PI. It is different one.

[dbanner]

Comparing someone's schematic drawings to a junkies handiwork falls way outside the boundaries of the Overton window.
Just another example of a thread gone awry because of silliness.
Here a man comes with good schematic circuit of his own work, presenting it for everyone's consideration. Then another person who is hell-bent on folly put large pictures of spiders web and rubbishes man's contribution.
Nobody says anything. He escapes unscathed, now he becomes emboldened to do it again and again without any fear of sanction. The Overton window has now become redefined to accept lower standards of behavioral protocol.
This is the classic definition of the Overton window. The regimes of the past and present know of this concept very well.
The man who brought SBG-PID here deserves better than this.

[wallker]

The man who brought SBG-PID here deserves better than this.

I agree.

As I said in the previous post, I respect anyone's effort to make something new or upgrade some existing design.

I also made a mistake comparing with the previous version SBG-PI, didn't mean nothing bad by this, just there was more details about it, and tests.

I was just annoyed by the fact that he did not want to publish a layout, and that's why I started to doubt it.

[Andi68]

Maybe I'll try to redraw the schematic.
I **** on the overtone window

[scs]

Sound is made to no get self-excitement.

[scs]

Received If the speaker field matches the CD4066's strobe.

[Andi68]

Is this a completely new development, how many have this circuit already built?

[dbanner]

Received If the speaker field matches the CD4066's strobe.

Thanks for explaining that.
What component is D2. Is it a 1A fuse?

[kt315]

Is this a completely new development, how many have this circuit already built?

i did see 'sasho varna discriminator' topic in russian forum and i still remember this schema... just can not find it here in geotech1.

[scs]

1n5819. Diod shotki. Low droup-U in-out is 0,2V.This in 1n4007 is 0.7V.

[kt315]

https://www.geotech1.com/forums/show...-discriminator
https://www.geotech1.com/forums/show...y-Sasho-Varna)

[dbanner]

1n5819. Diod shotki. Low droup-U in-out is 0,2V.This in 1n4007 is 0.7V.

Thanks very much. Schottky diode, yes.
I am going to make this detector to see it's performance.
I will have to make a through-hole PCB layout. I will share my layout when completed.
Sacho, please pay attention to your topic. I will have more questions soon. I need few days to assemble the device.

[Andi68]

I do not know what to think about this

[dbanner]

I do not know what to think about this

This is NEW schematic, never before posted on geotech. Let's build this detector. you can redraw the schematic, I will design a thru-hole layout. We can work together. Sacho will answer all our questions.
His designs are very good.