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Treasure Hunting & Metal Detecting Forum Message Boards - Detector Hunter Whites Minelab Tesoro XP > Tech Talk > GPR & other Geophysical Devices > Magnetometers (Moderator: Eugene52) >

Finding an IC

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GoldDigger1950

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	Re: Finding an IC « Reply #10 on: May 16, 2012, 07:51:46 pm »

	Quote:	Posted by homefire
This is why God made Engineers! EE type that is! AC fed it is still afloat in a sense! LOL Shocked Cool

Not when that pin requires a ground, mate. Others can use a virtual ground but not the LM709. That's a very old part number.

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	Re: Finding an IC « Reply #11 on: May 16, 2012, 07:55:42 pm »

I know how old they are. I'm older! LOL

I happen to have a few of those from the SandBank days.

Just can't find that stuff any more for less then a Arm or Leg. Shocked

And they do get Persnikity. Love to Toast if not just right.

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	Re: Finding an IC « Reply #12 on: May 16, 2012, 08:02:23 pm »

OK, Homefire. Let's stop this nonsense conversation now. That is NOT the right part and he is no closer to finding out what it is. This is the kind of stuff I refer to when I say that a serious thread is sometimes put aside by absolute nonsense. All of the LOLs and other stuff is just confusing this poor guy. Do NOT reply to this. Just drop it.

The LM709 is NOT the part he needs.

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	Re: Finding an IC « Reply #13 on: May 31, 2012, 03:07:44 pm »

Hi kazem2114

take the old IC ? out from the pcb
Is their 78xx ,790x ? test the output may be Damaged!!!!!-------if no
Please measurement between the two pin 4,8 ??

Is this change consistent with the truth in the? if no ------ the IC ? is an OLD IC dont need GNG It is a combination of 2 OR 3 transistor.

best time

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	Re: Finding an IC « Reply #14 on: June 01, 2012, 05:54:05 am »

	Quote:	Posted by japanese
take the old IC ? out from the pcb Is their 78xx ,790x ? test the output may be Damaged!!!!!-------if no Please measurement between the two pin 4,8 ??

It's not a voltage regulator. It's some sort of op-amp. We just don't know which one and we can't determine which one it is by the information given up to now.

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	Re: Finding an IC « Reply #15 on: June 01, 2012, 08:39:05 am »

yes GD the old IC ? is not a voltage regulator ,but For each device has 2 regulator ( 78xx ,79xx ) series or 2 voltage regulator circuit to obtain +Vcc , -Vee To run the op amp circuits .They will Lead to type,Leads to the name numbering of pin ( its one op amp )

he will show that of the device

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	Re: Finding an IC « Reply #16 on: June 01, 2012, 11:40:57 pm »

Hi guys
I'm so close to this IC
this is an op amp with some pins for frequency compensation
and I should mentioned that I was a little mistaken about the last schematic
This is the correct one
NOW engineers help me ...

I searched a lot
ST is the manufacturer of this IC
and it's so similar to LM/UA 709

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	Re: Finding an IC « Reply #17 on: June 02, 2012, 07:40:13 am »

and the last schematic Has other mistakes !!!!!!!!!!
This is the not correct ......

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	Re: Finding an IC « Reply #18 on: June 02, 2012, 08:33:57 am »

No man
This is exactly what I have in my metal detector
What are the mistakes in your point of view for instance Huh?

Posted on: June 02, 2012, 08:29:36 AM

If you take a look at datasheet of UA709 you can get the similarities...

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	Re: Finding an IC « Reply #19 on: June 02, 2012, 09:57:28 am »

-u have the last schematic & datasheet ----- see the difference in all pin numbering.

- the last schematic Has other mistakes.

-read Reply #13...,15

-Why does it seem you did not read well !!!!!!!!!!

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