SBG-PID

[scs]

A classic scheme, the SANDBANKS 150 also has a option pulse with a short duration .

[scs]

The error is in the numbering of op. Now is good.

[wallker]

I don't see difference at OP2.
What was the error at OP2?

[scs]

Delay diagram .I noticed errors in the pin numbers of op2,op3. Corrected scheme.

[dbanner]

Can you please say pulse width of control samples? And first sample delay?

[scs]

According to I meter. In 250microapers It's different from 1000 microamperes. Trimmer is for offset.

[wallker]

The resistors R43 and R51 are selected according to the meter

I think that is best to change them with 25k trimmer.
At least I will do so.

[scs]

The resistors R43 and R51 are selected according to the meter

[6666]

See? You people always ready to go to wrong conclusion. It is typo error, I meant 1000 micro amperes,(1mA) meter movement, which is most widely available meter for salvage from anywhere. 500 uA less common and harder to find for salvage.
Sacho has since stated 500uA Meter. Very well, fine by me.

See what ? I was deadly serious, in my profession we deal in thousands of amps at 50 volts

[dbanner]

Do you two talk about D1?

D2 is zener 4V7, right?

D1 Schottky 1N5819, D2 zener 4V7.

[dbanner]

Schottky diode 1A, 40V.

[Andi68]

Yes

[wallker]

What component is D2. Is it a 1A fuse?

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

Do you two talk about D1?

D2 is zener 4V7, right?

[6666]

Frequency changes for faster search and for work on high voltage lines.Meter is 0.5 mA.

Thanks for the meter information

[6666]

Try 1000 ampere meter movement.

I overloaded my last 1000 amp meter