LM2596 module questions

[Quigsworth]

I'm sure this info is on here somewhere but...I've admitted my inherent laziness before...has anyone modded these modules? I'm seeing the 2 holes directly adjacent to pin 5, I assume that's where you'd make the connections to use the on/off pin...I'm also assuming the reason why there's 2 holes is because it's similar to the OKR set up where I'd use one of the holes to put a 5-10K res from pin 5 to neg to drain and the other hole is for a N/O tack between pin 5 and + in

...or, I'm a complete idiot and I'm about to get schooled, lol

View attachment 71199

Also, while I'm putting myself out there for ridicule...the data sheet puts the res. range of the on-board trimmer at 50 to 2M ohm...anyone pull it off and use something else? like a digital pot?

I'm sure there's going to be the question "why did you buy a module if you're only gonna hack it?"...that'd be a good question...

 

[Barryg41]

My LM2596 does not have two holes by the No. 5 pin. Different make or batch. I also thought about taking it off the trimmer. Can't see why you couldn't do it

 

[BJ43]

I have red, blue, and green LM2596, the last three I bought are green and have the holes next to pin 5. The red and blue I have do not have the holes.

 

[TomCatt]

I haven't noticed (i.e. didn't look that closely ) those holes on my LM2596s. I don't see why you couldn't use a digital pot. (but then I know next to nuffin' bout lectronics ). Have thought about removing the pot to relocate it; maybe on the next mod

 

[Barryg41]

I have the blue ones!

 

[WillyB]

... I'm seeing the 2 holes directly adjacent to pin 5, I assume that's where you'd make the connections to use the on/off pin...I'm also assuming the reason why there's 2 holes is because it's similar to the OKR set up where I'd use one of the holes to put a 5-10K res from pin 5 to neg to drain and the other hole is for a N/O tack between pin 5 and + in

...or, I'm a complete idiot and I'm about to get schooled, lol

View attachment 71199

..the data sheet puts the res. range of the on-board trimmer at 50 to 2M ohm...anyone pull it off and use something else? like a digital pot?

I'm sure there's going to be the question "why did you buy a module if you're only gonna hack it?"...that'd be a good question...

That assembly came with a datasheet? How about a link.

Those assemblies are decent. They aren't very efficient though, for reliable operation over 2A they need a heat sink and some breathing room in your mod.

 

[BJ43]

Hey guys the green ones are smaller also 43mm x 20mm, the red 49mm x 23mm..

 

[Dieseler]

Just looked at the ebay item LM2596 picture i bought and appears to be the same one with the 2 holes and also curious now about the 2 holes not that i would know what to do with them.
Heck i dont even know what a digital pot is.

 

[vertigo]

I'm sure this info is on here somewhere but...I've admitted my inherent laziness before...has anyone modded these modules? I'm seeing the 2 holes directly adjacent to pin 5, I assume that's where you'd make the connections to use the on/off pin...I'm also assuming the reason why there's 2 holes is because it's similar to the OKR set up where I'd use one of the holes to put a 5-10K res from pin 5 to neg to drain and the other hole is for a N/O tack between pin 5 and + in

...or, I'm a complete idiot and I'm about to get schooled, lol

View attachment 71199

Also, while I'm putting myself out there for ridicule...the data sheet puts the res. range of the on-board trimmer at 50 to 2M ohm...anyone pull it off and use something else? like a digital pot?

I'm sure there's going to be the question "why did you buy a module if you're only gonna hack it?"...that'd be a good question...

guys..i need help..i bought a LM2506 but not the same what ive seen here..can someone help me ..heres the pic..

http://www.onsemi.com/pub_link/Collateral/LM2596-D.PDF

cheers!
vert

 

[TomCatt]

You got just the LM2596 regulator itself, Vert. Not sure about hooking that up. Get some of these from eBay (USD 2.18 each) - LM2596 DC Step-Down Adjustable Converter Power Module | eBay. They will be much easier to use.

 

[jhonutz]

guys..i need help..i bought a LM2506 but not the same what ive seen here..can someone help me ..heres the pic..

http://www.onsemi.com/pub_link/Collateral/LM2596-D.PDF

cheers!
vert

you say about lm2596, is present in 3 cases but have the same pin numbers. If i understand what do you want

 

[vertigo]

you say about lm2596, is present in 3 cases but have the same pin numbers. If i understand what do you want

what i got now is the 2nd pic of the link..5 pins..i just asked a friend to buy me a LM2596 as i will use it for VV mod..then when he gave it to me i was shocked lol..its not the same as what a LM2506 looks like..is it possible to make this one a VV mod?

 

[vertigo]

You got just the LM2596 regulator itself, Vert. Not sure about hooking that up. Get some of these from eBay (USD 2.18 each) - LM2596 DC Step-Down Adjustable Converter Power Module | eBay. They will be much easier to use.

hmm is there any way to use this? or it will be just a waste?

 

[TomCatt]

Here's a schematic with the LM2596 (the DS-1869-10 is a digital potentiometer) - http://www.e-cigarette-forum.com/forum/battery-mods/239610-my-newest-mod-box-vv.html#post4593879

 

[WillyB]

You got just the LM2596 regulator itself, Vert. Not sure about hooking that up. Get some of these from eBay (USD 2.18 each) - LM2596 DC Step-Down Adjustable Converter Power Module | eBay. They will be much easier to use.

Well I gotta disagree, forget that $2 trash.

If you are going to the trouble of building a mod why have the 'brains/control center' of your mod be the cheapest part?

Although a tad larger this board appears superior in every way. These things generate heat, best to get one more equipped to dissipate it.

Note the pad it's sitting on.

And on the back.

DC-DC Adjustable Step-Down Voltage Regulator Module | eBay

 

[TomCatt]

Just curious, Willy, since they are both LM2596 modules, what makes that one better?

Also, while I don't vape at high watts, I haven't felt any heat from the LM2596s. The eBay listings suggest adding a heatsink if pulling 3A current; but could that be for continuous current applications as opposed to the intermittent currents that vaping generates?

I have a LM350T PT using the same 12V/2A AC adapter that I use for the mods I've made with the LM2596 modules (in PT mode). I've felt how hot the linear LM350T can get going from 12V to 4.5V; the LM2596 is still cool after hours of vaping in PT mode.

 

[vertigo]

jhonutz..tom and willy thanks for the advice

 

[BJ43]

I like Tom have been using my trash for many months, both sizes and don't feel any heat, I kinda get a kick out of my $10 VV mods that give me more pleasure than a $200 PV. Like being a 747 captain but enjoy flying a J3 Cub.