LM2596 Buck Converter voltage not changing

Using Arduino General Electronics
1

Hello, I am working on a portable retro game console and am trying to get the battery circuit working. I am powering the circuit with a 3.7v 4500mAh lipo battery, so I wanted to use a boost converter to boost the voltage up to 5v so I could power all of my components. Here is the converter I purchased: https://www.amazon.com/dp/B06XRN7NFQ/ref=cm_sw_r_cp_api_glt_fabc_TJTXY59JSCW61ASRQJYB
It had good reviews and it said it could boost voltage up to 35v which was more than enough for my project. Unfortunately, when I got it and plugged in my battery, adjusting the potentiometer did not have an effect. After multiple counter clockwise turns I was able to get the voltage down to 1.2v, but once I boosted up to around 3.3v it would take a lot of clockwise rotations to even boost it up to 3.5v, and I couldn’t get it to go any higher. Is there something I’m doing wrong? Is my bird faulty? Should I purchase a different board?

Thanks in advance for the help.

2

Here is the description of the item that you linked to

DZS Elec 2PCS LM2596 DC-DC Step Down Variable Volt Regulator Input 3.2V-40V Output 1.25V-35V Adjustable Converter

It seems that you wanted a boost converter but bought a buck converter

3

The output voltage is strictly less than the input voltage for a buck converter like the LM2596. Give it 40V on the input and you'll easily be able to see 35V on the output...

Where did you see anything about the LM2596 boosting? Its a buck converter chip.
The link you provide clearly states "step down" and "buck".

4

Oh, ok. I guess since I saw that the potentiometer could change the voltage up or down I assumed I could use it as a boost. Would something like this board work? https://www.amazon.com/dp/B07T7ZCTNK/ref=cm_sw_r_cp_api_glt_fabc_G7HS6FDTYACF2R1P52CQ

5

I guess since I saw that the potentiometer could change the voltage up or down
That is only true for a BUCK/BOOST CONVERTER .

6

Sorry, that is a potentiometer, it is not magic. :roll_eyes:

That looks appropriate.

7

This topic was automatically closed 120 days after the last reply. New replies are no longer allowed.