+3 v reference METHOD

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myfaithnka

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Hi all,


is there any cheap way to a 3 v reference to power an lm358,opamp.

Thank you.
 

You can use a pot off the LM358 power supply and adjust it to give 3V output. Of course, the power supply must be regulated then.

You can also use a cheap TL431 along with 1 resistor and 1 variable resistor.

https://www.onsemi.com/pub_link/Collateral/TL431-D.PDF

Look at Figure 2 on page 5 in the above link (datasheet).

Hope this helps.
Tahmid.
 
Hi tahmid,
i am using this method from a battery which will discharge towards 4v from 6v.is it ok to use tl431 here this case. I am doing an low voltage cut off ckt.

Thanks
 

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