When a DC power supplies current meter is oscillating back and forth , what does this mean?
The current meter is an analog meter with a needle , but the needle is moving back and forth
Is the power supply oscillating? from being over drawn?
Does this only happen to linear power supplies and not switching power supplies?
The circuit board has a DC switch to turn on the DC power supply, and also a second switch for the AC 115volts.
The power supply current meter doesn't oscillate or needling swinging if the AC switch is OFF. Only when the AC switch is turns ON , the DC powers supply current meter needle starts to swing and oscillate, why is that?
The current meter is an analog meter with a needle , but the needle is moving back and forth
Is the power supply oscillating? from being over drawn?
Does this only happen to linear power supplies and not switching power supplies?
The circuit board has a DC switch to turn on the DC power supply, and also a second switch for the AC 115volts.
The power supply current meter doesn't oscillate or needling swinging if the AC switch is OFF. Only when the AC switch is turns ON , the DC powers supply current meter needle starts to swing and oscillate, why is that?