Can you try a DC to DC converter without any load?

F5F Stay Refreshed Hardware Desktop Can you try a DC to DC converter without any load?

Can you try a DC to DC converter without any load?

Can you try a DC to DC converter without any load?

S

SkyInsane
Senior Member

718

06-02-2023, 11:09 AM

#1

I just received a DC-to-DC bulk converter step-down module. I aim to use it to reduce my excess 16.5 Volt laptop power supply to 12V. I connected the 16.5V laptop power supply to the module's input and used a voltmeter at the output. However, the meter displayed voltage fluctuating between 10V and 3V, with readings oscillating up and down. The module includes a potentiometer for output adjustment. Why is the output changing? Am I testing correctly? Should I add a load or does the bulb converter function with my input power brick?

S

SkyInsane

06-02-2023, 11:09 AM #1

I just received a DC-to-DC bulk converter step-down module. I aim to use it to reduce my excess 16.5 Volt laptop power supply to 12V. I connected the 16.5V laptop power supply to the module's input and used a voltmeter at the output. However, the meter displayed voltage fluctuating between 10V and 3V, with readings oscillating up and down. The module includes a potentiometer for output adjustment. Why is the output changing? Am I testing correctly? Should I add a load or does the bulb converter function with my input power brick?

V

vandalmal
Member

201

06-03-2023, 03:45 PM

#2

When connecting to the original power brick, do you notice the variation there as well, or only after using the converter? Would you be willing to try another brick to determine if the problem is with the 'step down' module? Please also think about the source—where are you located and what type of output are you using (mains, generator, solar panel, etc.)?

V

vandalmal

06-03-2023, 03:45 PM #2

When connecting to the original power brick, do you notice the variation there as well, or only after using the converter? Would you be willing to try another brick to determine if the problem is with the 'step down' module? Please also think about the source—where are you located and what type of output are you using (mains, generator, solar panel, etc.)?

Y

Ygr1k
Member

218

06-03-2023, 05:56 PM

#3

I used 12V from an ATX power supply as input and achieved a stable 4.5V output under no load. It seems the DC output varies between an ATX PS and my laptop adapter. The bulk converter includes two adjustment ports (CV, constant Voltage, and CC). With the ATX power supply as the 12V source, I adjusted the voltage control potentiometer (CV) but saw no change in output voltage. The issue is whether a load is necessary to adjust the output voltage. If yes, how can I create a DC load?

Y

Ygr1k

06-03-2023, 05:56 PM #3

I used 12V from an ATX power supply as input and achieved a stable 4.5V output under no load. It seems the DC output varies between an ATX PS and my laptop adapter. The bulk converter includes two adjustment ports (CV, constant Voltage, and CC). With the ATX power supply as the 12V source, I adjusted the voltage control potentiometer (CV) but saw no change in output voltage. The issue is whether a load is necessary to adjust the output voltage. If yes, how can I create a DC load?