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buck boost circuit

nghiep

Mar 26, 2022
3
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Mar 26, 2022
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Hi, I a beginner . i found an image of circuit diagram from this link : https://www.instructables.com/DIY-BuckBoost-Converter-Flyback/#discuss

I dont understand the part around U1 - 7805? what the purpose of U1-7805 in this case ?
Furthermore, in the diagram there is 5 V source ,where is the 5 V source come from ? The author only say change 20 to 5V by using op amp but in here the 5V source not come from op amp.

Could you guy explain these for me ?
 

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Martaine2005

May 12, 2015
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May 12, 2015
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The 7805 is a 5 volt regulator.
The 12V is the input voltage to the 7805 voltage regulator.
That is where the 5V comes from.

Martin
 
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