SBG-PID

[dbanner]

It appears everyone just quit. I've seen no one say, "I've built it but it doesn't work." And I see no reason why it wouldn't work. But I can see 100 ways an inexperienced builder can make a mistake. As Andi68 says, this is not a circuit for a beginner, you need to know what you are doing.

What I found strange was that so many competent people committed to building it, and then just vanished from the thread with no explanation, some even went so far as to post pics of their progress, only to drop off. That seemed a bit strange to me. I started to think maybe there is flaw in the design. But this is not the case.
You're right, no one has said they built it and it doesn't work. And as I stated above, I never doubted that the circuit SHOULD work, as the author claimed. The schematic has been gone over, and based on this, it should detect a metal object. But main question is whether or not the meter discrimination portion and so called "ground balance" can be substantiated by a working prototype. This is the crux.
I wanted to give it a go, but others started to build it before me, so I adopted the "wait and see" approach. I guess people just lost interest. Me included.
I was stuck in the mindset of few years ago, when there was a building frenzy on the forum, a schematic would drop, and the next day there would be a working circuit, constructed overnight by a sleepless warrior!
This is not the case anymore, it seems.

[Carl-NC]

No working prototype after 14 pages of the thread should tell you something. Several people have initiated construction, yet not a single working prototype. Seems strange.

It appears everyone just quit. I've seen no one say, "I've built it but it doesn't work." And I see no reason why it wouldn't work. But I can see 100 ways an inexperienced builder can make a mistake. As Andi68 says, this is not a circuit for a beginner, you need to know what you are doing.

[Andi68]

Thanks akirada
I do not know when I will continue

[dbanner]

I never doubted that the circuit should work. The author said it works "perfectly"

[arakida]

hi, i started it 2 days ago, because it's hard to find a good lf357 and replace it with ne5534 without changing components but short detection problem! with D.20mm 0.5mm ? 240uh at least prove the circuit works ..

thank you all for your time.

[Andi68]

In fact I started, took a break because of the summer heat and I'm not motivated now
I know too little about the PI technique.
A beginner should build a proven project, not this one here

[arakida]

thanks banner, it looks like I have to wait for the next thread. because some ic series are quite difficult to get, especially lf357

- best regards

[dbanner]

No working prototype after 14 pages of the thread should tell you something. Several people have initiated construction, yet not a single working prototype. Seems strange.

[arakida]

I am a beginner member, I impressed with this unique and small project, does anyone work? I plan to make this in the next few weeks, sorry that my English is not very good!

regards

[walkman]

Nice work selim

[wallker]

Looking good Selim.

[selim]

[6666]

hi, i think it would cheaper for you if you order from china
they way is a bit shorter
i sell only within EU

it?s really not economic to order pcb from china to germany and send them to australia

OK thanks.

[bernte_one]

hi, i think it would cheaper for you if you order from china
they way is a bit shorter
i sell only within EU

it?s really not economic to order pcb from china to germany and send them to australia

[6666]

i have several pcb here
delivery eu wide is no problem

my shack is to hot to work in the summer too
next weeks the wheather calmes down, and the temparature is more comfortabel so solder


should i make a thread in the buy sell trade area here in forum?

i have much projects on stock, and my wife is nerved of all these green, blue, yellow stuff flying around

Hi bernte_one, what PCB's do you have that you could post to Australia ? thanks.