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Regarding 7805, there is a serious current noise after the voltage drop?

Hardware design
August 19, 2020 by Mohammed 1592

I think there should be no problem with the size of the front and rear capacitors. There is no noise on the circuit board without a load. After a small load is connected, there will be even currents. How can I solve it? ? ?

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Omar Posted on August 19, 2020

Sizzle? Is it a horn? Please list your 12V power supply and load. In addition, your circuit diagram 100nF/6.3V is wrong.

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Fatima Posted on August 19, 2020

What load and how much power?

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  • Mohammed

    Mohammed Posted on August 19, 2020

    The load is connected to a 0.96 inch screen module, and its current is only 6MA, ah, there is no problem if you don't connect it.

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Nadia Posted on August 19, 2020

The picture still has some problems.

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