Somebody can help me to identify this IC ?

Thread Starter

Clomifuge

Joined Jan 16, 2022
36
Hi all and happy new year,

I am not very sure, somebody can help me to identify this IC ? L324 ? (LM324 ? ) this IC is on a DC Barmeter.

Thanks by advance.IMG_0047.jpeg
 

Thread Starter

Clomifuge

Joined Jan 16, 2022
36
Hello,

It could well be a LM224, wich is comparable with the LM324.
The LM224 has a lower offset and temperature drift.

Bertus
Hi and thanks Ok I almost to be sure but I had a small doubt, this PCB drive this 30 Led Bar with Common Anode like this, do you have any idea how it make it ?

Capture d’écran 2022-01-16 à 11.10.09.png

Thanks again and have a good day or night :)
 

Thread Starter

Clomifuge

Joined Jan 16, 2022
36

bertus

Joined Apr 5, 2008
21,850
Hello,

I have never seen schematics with a multiplexed display and a LM3914.
I have seen cascaded circuits, as in the datasheet.

Bertus
 

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Thread Starter

Clomifuge

Joined Jan 16, 2022
36
Hello,

I have never seen schematics with a multiplexed display and a LM3914.
I have seen cascaded circuits, as in the datasheet.

Bertus
Hi,

Yes for sure...

I have to design a driver command schematic and drive them with a Log amplifier for a Audio Use, but I don't have expertise for design the multiplexed driver led .

Thanks my friend for your help.

Best
 

sagor

Joined Mar 10, 2019
671
Other devices ending with 224 are 74LS224, which is a 16 by 4 bit Synchronous memory.
Not likely it is that, but I thought I'd throw in that guess....
 

Thread Starter

Clomifuge

Joined Jan 16, 2022
36
Other devices ending with 224 are 74LS224, which is a 16 by 4 bit Synchronous memory.
Not likely it is that, but I thought I'd throw in that guess....
Hi Sagor and many thanks for your help but this IC is a specific product, the Engineer want to protect his design I can understand ! Best and happy new year to you
 
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