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what these parts do?

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yafch

New Member
The schematics i attached here has two Mosfets connected to Mcu. My question is what exactly they do in this circuit. Second question is about their replacement, can i replace them with some common p-ch mosfets. Parts package may not be an issue for me. Thank you
 

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Externet

Well-Known Member
One mosfet selects R29 or R30 as the pullup resistor; the other controls power on/off to that LM311 pin with 5V.
 

yafch

New Member
So basically these are used for switching here. That means these can be replaced with other common P-ch types.BS250 is not easy to find, P-ch mosfet are not very commonly used,are often more costly as compared to n-ch mosfets.
 
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