Mini DC-DC1.3A Step Down Module 12V 24V to 5V + Integrated Inductor for 360 RC

Other Hardware Motors, Mechanics, Power and CNC
1

Hi,

I bought few of these from Banggood, to save power cords for my projects. Idea is to use only one 12V output frome where I can take 5V to Wemos board, while 12v goes to ledstripe. Wemos mini has no 12V input.

So what are these connections;

VO+ This should be easy, selected voltage Out
GND This I know :smiley:
IN+ Input voltage 12-24
EN What is this? (From one data book; "Voltage range at EN, H/L, FB –0.3 to VIN +0.3, ≤7.0 V"
Does not help me very much.

On the long side is text; ADJ with selectable output voltage pins. Do I have to solder 0 ohm resistor to ADJ(ust) pins (or some other size R, and what if so?) before I can use alternative outputs?
And how about the voltage pins? Solder 0 or some other resistor.
Not so relevant, but B-side also have a text; AJ7, but no any connector as I can find. What might that mean.

Then this board also has "Integrated Inductor for 360 RC". Probably some sort of rotation or so sensor for RC cars, etc, right?
Maybe never need that, but it would be nice to know how to use it.
Hopefully someone knows something to help me before I "try and fail" :slight_smile:

Here is the link to the BG site, with good pics of the board; Banggood stepd down DC

2

Here you go:
VO+ This should be easy, selected voltage Out- Correct
GND This I know : Ground - Correct
IN+ Input voltage 12-24 - Correct
EN What is this? (From one data book; "Voltage range at EN, H/L, FB -0.3 to VIN +0.3, ≤7.0 V"
Does not help me very much. That is the ENABLE pin, it needs to be jumpered (there should be some pads or pins) or connected to the micro to control it. This response is to help you get started in solving your problem, not solve it for you.
Good Luck & Have Fun!
Gil

3

gilshultz:
Here you go:
VO+ This should be easy, selected voltage Out- Correct
GND This I know : Ground - Correct
IN+ Input voltage 12-24 - Correct
EN What is this? (From one data book; "Voltage range at EN, H/L, FB -0.3 to VIN +0.3, ≤7.0 V"
Does not help me very much. That is the ENABLE pin, it needs to be jumpered (there should be some pads or pins) or connected to the micro to control it. This response is to help you get started in solving your problem, not solve it for you.
Good Luck & Have Fun!
Gil

Thanks for this. Have you found any examples to use this board?
Any idea how to use those other pins I asked, ADJ for example?

4

This far I'm in this point with this "problem";

This seems to fullfill my needs without any soldering or programming.
In 12 V -> VO = 5V.
EN seems to be always same as In V.

I soldered 3.3V pins (short circuit) and output was 2.3V. Also when I short circuit 9V pins (only)
ADJ pins, I could not find any difference in output V.

Still would be nice to know how this is planned to use properly. Someone must know....

5

If you look at the comments at the bottom of the Bangood page there is an explanation of how to fix this problem.