Tip:
Highlight text to annotate it
X
Good morning!
I noticed an interesting phenomenon.
This is a buck converter.
I'm going to use it for a mini fan.
It cannot be properly controlled by PWM.
I don't know why.
Here we have the input of twelve volts.
I have adjusted the output to nine volts.
Now there's no load.
Just this voltmeter.
I'm also observing the input current.
Here.
I noticed that when I touched this to see if it's warm...
Because this another
slightly different version gadget did get a bit warm.
Even with no load.
I noticed that when touhced by a finger,
the input current suddenly rises - and it stays up.
The voltages are the same.
Now I'm...
Touching it with finger...
It returns back to
Well it was 25 now it's 27 mA.
I can see that a signal changes there when touched
but that stays after that.
That's what I'm wondering.
Also the spot you're touching matters.
Of course it's not meant to be touched
It's just pretty odd.
Let's apply a test load.
This is a... should be the 330 ohms...
Yes.
Should a bit...
increase the current...
Let's try resetting the current with finger.
Well not actually resetting to zero but set to the...
lower current consumption.
Like this.
Nine volts seems there still.
The resistor starts to
warm up at the finger!
Okay.
So it's a 330 ohm load.
Okay the voltage is fluctuating 'cause the flimsy connection :P
Yes also with the load it is doing that...
variation.
It's about seventy
milliamps at lowest
and when you finger the circuit
it rises at least to some extenct.
I think it was...
Oh fuc...
This is hot!
This was exceptionally stupid video but
such issues
you sometimes notice.
Thank you for your interest, bye bye.
Here we go with one hand...
This sucks.
How shall I do this...
Too big job to grab the tripod. :P
Just a sec.
Okay...
So I noticed a such...
*** it detached again!
Yeah, that's what I'm talking about, the good old "sugar cube"! :D
The input is twelve volts and I have adjusted it...
And now this...
Fffuck, detached Again.
I must solder.