SBG-PID

[ZOUjiarui]

[ZOUjiarui]

[ZOUjiarui]

And a sascho1.

[Emersonpaz]

TL431 would be an option.
After all, the circuit works someone concluded?

The common conductor of the circuit is a plus. A negative voltage stabilizer is needed.

[ZOUjiarui]

Get this chart from the Arabs.

[ZOUjiarui]

I think they're connected.

[ZOUjiarui]

[zakari]

hi all
the pcb's

[zakari]

hi sasho
if you are here yet please help me
i made according this schematic

[zakari]

hi all
i made this detector but not working
vt9(bc337) has been hot and sound is continuse
i made the original sasho's pcb
best regard
zakari

[6666]

sometimes is more easy and more convenient to switch opamps

No worries , I thought that was the reason,
just thought I would mention it for other people making the project, I'm still waiting some parts.

[ivconic]

Hello Ivconic, I have discovered late last night that your PCB layout does not match your redrawn schematic pin numbers.
I guess I missed a post about it.
But when I buzzed the pcb this is what I got
u3a pins 567
u3b pins 123
u4a pins 567
u4b pins 123
u5b pins 567 correct labels
I think I got this correct or I have embarrassed myself

Yes is true.
Why is that?
First i draw schematic. And is not important whether you will use first or second opamp in dual packaged opamp.
But later when i try do draw pcb according that schematic; sometimes is more easy and more convenient to switch opamps from dual (or quad) and use second one instead first on specific place on pcb.
As long as inverting, non-inverting and output pins are on the same place where supposed to be.
It is the same if you'll use "567" or "321". Opamps inside are the same.

[6666]

Hello Ivconic, I have discovered late last night that your PCB layout does not match your redrawn schematic pin numbers.
I guess I missed a post about it.
But when I buzzed the pcb this is what I got
u3a pins 567
u3b pins 123
u4a pins 567
u4b pins 123
u5b pins 567 correct labels
I think I got this correct or I have embarrassed myself

[nickel_n]

Thank's 6666