Відео

Such boards from China normally have a fake chip, it is not from TI. But of course the board will work.

Hello from EiTI 👌🏽

Those switchmode converters are a very useful tool. I'll tell you one useful application, in analogue circuits where you need an adjustable bias voltage below zero but have only a positive single rail supply

what data sheet did you get the info from,i can't find the lm2596 used as an inverter anywhere.

no funciona genera corto y se calienta el integrado

Lmao that so cool, but so dumb. Thanks man xd

I buy the ti chip and made the inverting circuit, damn I got plenty of that board🤦

Just turn your meter wires the other way round!!

Great presentation, thank you man!

I did the exact same and my buck converter just gets warm am i doing something wrong ? im using a LM2596S the board looks the same as the video

I used to use buck-boost converter for negative voltages

I used the xl7015 buck converter for negative voltage in a similar way, it is excellent

Great video!

I took inspiration from your video and made two sources. I didn't include regulated output. ua-cam.com/video/IOWBzwuNXaw/v-deo.html

Neat !

Will this board supply enough current to replace a 9V battery pack made of AA batteries? I have a metal detector that runs on +12v and -9v with a shared GND. I was wanting to replace it with a higher capacity 12V LiPo pack. Then use a circuit like in this video...to get the -9v.. Would this circuit work for what I am trying to do?

nobody else spots the issue?

Hi, I found this site a few years back looking for a regulated negative supply (6v, ~500mA) for my tape recorders from some 18v power tool batteries. It works very well. I added the ripple filter described in the datasheet, giving me about 5-10mV of ripple. I wanted to try two buck converters to give +12/-6V but I haven't had the guts lol. I might get some more boards and study your video more. Thanks for making it!

Thanks! Any photos or diagrams of the specifics of that mod? Thanks in advance👍🏻

Greate

Please I need variable analog converter circuit diagram that can convert 0-10v positive 0 to -10v output.

Also remember: Maybe you do not need one! Only the electrodes of the circuit need to be within the rail, that does not mean that the input resistors need to be.

Thank you

Works great. I just implemented it for the analog section of my DIY oscilloscope.

Thanks for that interesting video. I will try to use the negative voltage to get a better control of the p-MOSFET I am using. Lets see if I got everything correct :)

Man I just want to thank you! This video is excellent, and it very helpful. It is the only which I've found about the topic. Really nice content, thank you!

wait, is the output capacitor ok with this being polarized?

This is exactly what I needed, thanks from Colorado.

tysm for this video, i've been trying to get this to work for the longest time and couldn't figure out why my supply kept triggering overcurrent, but you explained it perfectly!

"Now, when I have finished my inspection, and I am still mad as hell because I have wasted a lot of time being fooled by a bad component - what do I do? I usually WIDLARIZE it, and it makes me feel a lot better. How do you WIDLARIZE something? You take it over to the anvil part of the vice, and you beat on it with a hammer, until it is all crunched down to tiny little pieces, so small that you don’t even have to sweep it off the floor. It makes you feel better. And you know that that component will never vex you again. That’s not a joke, because sometimes if you have a bad pot or a bad capacitor, and you just set it aside, a few months later you find it slipped back into your new circuit and is wasting your time again. When you WIDLARIZE something, that is not going to happen. And the late Bob Widlar is the guy who showed me how to do it. Bob Pease - Troubleshooting Analog Circuits"

I trying the same but not works. Power supply show a short circuit.

Hi Filip. Thanks for this video. There are also small modules (1 or 2€) which give directly outputs v+, gnd and v-. The output current is not very high (100mA to 800mA, with sometimes a difference between the max current on + and - output). Have you ever been test these modules and what do you think about them?

Is there any way to do the startup input current trick on the XL4016? It doesn't have an enable pin

It is a bad regulator because in the event of a short, the unregulated voltage passes to the load.

For those that don't have Resistor Color Band Codes memorized, the 68 Ohm resistor you need will have color bands that are Blue, Gray, Black, Gold.

i wished i watched this video sooner it is for over a year now i was trying everything to get a negative voltage from a positive voltage without moving the ground so i can have positive ground and negative and everything i tried ended up to not working or moving the ground i tried the lm2596 too with the schematic in the datasheet but it never worked god knows how much i thought about that and why it doesnt work and finally it seems i know why i cant bellieve the answer was just more amp and i was thinking there must be a short in the circuit i built so i teared everything apart and started again and again and again from scratch i was almost ready to give up on it when i found this video

Also while the chip being fake it doesnt make it that different. Sometimes All that really changes is the long term durability

This just blew my mind you can just "Hook it up differently and get a negative voltage". Thank you my man

thank you a lot, the ender 2 pro use exactly the same board model. LCD without light is good to me.

Thank you for sharing. I have the same Buck converter. While I do get a negative voltage, it starts getting really hot.

Great video. I have a Ender 3 pro and I like to mount a potentiometer to adjust the brightness. I have a camera that watches the work in the night and I want to take a look at the display to look at the percentage of the printing process. The display is too bright, so that the camera switches not in the night mode properly some times. So I want to dim it a little.

Thanks for the video, what a shame they don't include the control already.

How can I get both positive and negative supply to drive 741cn operational amplifier

This is great, really appreciate you sharing this. DC-DC converters with a negative voltage output are virtually non-existent. I was able to finish the re-design of a vintage computer power supply with easy to get parts. Thanks!

Great video! One question, how many ohms was the resistor you used? Thanks!

You have a good channel my friend God bless i hope to see more . this reminds me of the can transistor with top cut off and used as a solar panel cell

Thank you so much!

Really great idea.....thanks!

can we use two smps dc psu unit in serial and we have negative voltage? For op-amp ics ?

They have dc dc step down modules. Can't we just take one of these and one buck?