A closer look at the AF108 bi-polar drive circuit

[green]

I'll post a simple diagram tomorrow. What I have been doing 100us Tx, Sample delay 10us, sample1 10us, GB Adjust(delay) 0 to 50uS, GB sample 30uS. This repeats for the negative cycle. Signal = (Sample1 + (-sample1)) - (GB + (-GB)). The differential integrator takes care of the sign on the negative samples by inverting them. Not sure if this is the best way, probably better schemes. If you change the sample delay the GB needs re-adjusting.

Tried your timings with Excel. With ground slope -1 and -1.3. With bipolar Tx adjust GEB delay until target sample and GEB sample are the same. With unipolar Tx adjust delay until[int with(GEB)] is minimum. I have been setting GEB delay about 4us and GEB sample about 100us. Adjust target delay 6 to 20us, then adjust target sample to adjust ground balance. Not saying it's a better way. Either delay or sample time could be adjusted to ground balance.

[Altra]

Tried your timings with Excel. With ground slope -1 and -1.3. With bipolar Tx adjust GEB delay until target sample and GEB sample are the same. With unipolar Tx adjust delay until[int with(GEB)] is minimum. I have been setting GEB delay about 4us and GEB sample about 100us. Adjust target delay 6 to 20us, then adjust target sample to adjust ground balance. Not saying it's a better way. Either delay or sample time could be adjusted to ground balance.

Nice spread sheet Green. There are numerous combination that would work as long as you can get the teeter totter to balance. If you didn't see it already, here is a video of the scheme I used https://www.youtube.com/watch?v=HKHWsdSx6Bw

[ivconic]

... here is a video of the scheme I used https://www.youtube.com/watch?v=HKHWsdSx6Bw

Give schematic&pcb HERE!

[ivconic]

No response?

[Altra]

No response?

I noticed you have not published full details on your mag?

[ivconic]

I noticed you have not published full details on your mag?

It is commercial.
If that what you showing on video is commercial too; than is alright not to disclose it.
I understood it is your AF108 diy?

[Altra]

It is commercial.
If that what you showing on video is commercial too; than is alright not to disclose it.
I understood it is your AF108 diy?

Here's is my posts on the circuit in the video. I was responding to some general questions here on BP pi. It's not an AF108.

https://www.geotech1.com/forums/show...cs-transmitter

[ivconic]

I see.
So it is Valon?
I don't follow similar topics with any(no) attention at all... if i am not in position to deal with materialized subject of such topic.
In this case Valon.
Only 2-3 people from forum can put their hands on such device... so it is not interesting at all. It is dead topic, narrowed to only few.
Gibberish .. other words, all what's written. No intention to harm any feelings. Is just my standing point.
Of course; speaking from the diyer perspecitve, got used on this technical and MOSTLY diy kind of forum.
Even if you post the full schematic and pcb of Valon; it will stay not interesting and irrelevant. Because of the firmware which is not possible to have.
Don't worry, it is only my standing point.
I don't watch porns; i deal with real alive girls... other words.

[Altra]

I see.

Even if you post the full schematic and pcb of Valon; it will stay not interesting and irrelevant. Because of the firmware which is not possible to have.
Don't worry, it is only my standing point.
I don't watch porns; i deal with real alive girls... other words.

I agree with you. You will never see me commenting on the Felizjoo or any of the Andy's clone projects because of the lack of firmware listings. You cannot improve or modify a hex file. But that's the developers choice, which I am okay with. Real women are the best. The AF108 circuit could be modernized and run by a micro which would make a nice project.

[ivconic]

I agree with you. You will never see me commenting on the Felizjoo or any of the Andy's clone projects because of the lack of firmware listings. You cannot improve or modify a hex file. But that's the developers choice, which I am okay with. Real women are the best. The AF108 circuit could be modernized and run by a micro which would make a nice project.

Important difference; still you can diy FelezJoo very easy and cheap. You can have it materialized, play with it, test it ...
You can have finished device.
But in case of Valon and similar; huge majority of us can not obtain it. So we don't have a clue about what few of you are talking about all the time.
I saw your video. I really like what i saw. And i hoped it is improved and modified AF108!
Therefore my disappointment and rude words; once i realized it has nothing to do with AF108.
Audio at your device on video reminds me on TDI?

[Altra]

Therefore my disappointment and rude words; once i realized it has nothing to do with AF108.
Audio at your device on video reminds me on TDI?[/FONT]

Don't worry we are all stressed over the dampanic, I mean pandimic. The audio is all done in software

[ivconic]

Don't worry we are all stressed over the dampanic, I mean pandimic. The audio is all done in software

With or without present calamity; stress is my middle name.
Seriously; i was hoping to provoke anybody here to give more details on AF108.
Preferably more accurate schematic.
Because i noticed that previously posted schematic stinks.
You can "feel" these things in process of re-drawing the genuine schematic and trying to decipher some drawing styles.
Somebody intentionally faked some parts.
Obviously i got nowhere with it so far.

[Altra]

The first post by Dbanner has the Whites factory schematic. Which schematic are you looking at?

[ivconic]

The first post by Dbanner has the Whites factory schematic. Which schematic are you looking at?

Exactly that one. I am having it from long time ago, much earlier than when Dbanner posted it.
All this time i never payed any serious attention on it. It stayed forgotten on my backup disc.
Dbanner reminded me on it.
Recently i had case to want to build a PI for specific and narrow kind of use.
For veterinarians. When examine cows and cattle.
Professional veterinarian visited me, we sat and talked several hours.
He explained to me all the deep details on that problematic.
Also he brought to me all the usual "targets" for such PI.
Usually short pieces of barbwire (!???), sharp large pieces of various needles and random metal wires.
All those are eaten by stupid cow! I couldn't believe!
And, by his words; this is serious and very often problem.
Cow swallows such "objects" without slightest clue, nor pain, nor difficulties.
But that metal later stuck to very dangerous area (for cow), in the enter of stomach (8 large ones in same volume, capacity 200kg !!!)
It is dangerous area, that narrow place, close to hearth. Often case to stuck through stomach directly to hearth.
Every each next bite and chew; pushes the "foreign body" toward a hearth.
Cow get sick, high temperature... etc.
Now.
He need detector able to detect such pieces at 22-30cm (from outside of a cow).
So next day we met again. We tested several detectors. Deus passed the test. But is stupid to buy Deus for such task, right?
Also expensive.
So Deus did and no other from tested did.
Last to test was my copy of Pulse Star II. It did too. With 18cm round coil. It also outperformed the Deus too!
I was pretty proud father of such crazy child!
So he bought it. My copy of PS II.
But he also told me that there is decent demand from other pros for such device.
I really don't intend to mass produce PS II copies for such uniform task, hell no!
PSII is large and robust. Heavy.
What they need is ultra compact, small and lightweight device. Easy to handle. With as less as possible "commands".
Besides; PSII is not my intellectual property. I can't do any more serious business by selling those. It is stupid.
So i wanted to make my own PI for such task.
But also; it is very hard, if not impossible, to be so clever to project and design PI detector today, when everything on that subject is already invented and made by someone else.
And than AF108 attracted my attention.
My idea is not to make copies of it and sell. My idea is to make only one diy, test it good, experiment a lot with it and than design own project basing on gathered experiences.
Ok i told you all.
That's the story behind all my fuzz so far...
Sheeesh!

[ivconic]

There is splendid niche behind this story.
I disclosed it.
I did incredible favor to somebody!
As usual... i'll stay with hollow nose...