Mains powered mod - hard to build?

[Method69uk]

Hi all


With all the parts I've seen available I've been thinking about having a go at making a mod of my own.

The thing is, I really like using my VV USB passthrough indoors when I'm at my computer... but these don't seem to last me long. I've been through 3 since I started vaping at the beginning of Feb.

Would any of you experienced builders know how easy it would be to build a VV mod that has no battery of it's own, but a socket to plug a 6v mains adaptor etc into?

I'm not even sure, maybe something is already available?


Thanks


Steve

[fred]

For a 2ohm atty, you would need a 6v supply that could kick out 3 amps.

For a 1 ohm atty, the supply would have to provide 6 amps

Personally, I don't get how passthroughs can really work when connected to a computer. USB spec is 500ma, which is nowwhere near enough to power a PV - but I'm no electrical engineer  - just kind of remember ohms law  from some time back (maybe ohms law is updated for the new millenium? )

[testdruif]

Hey Method,

I just received my usb charging boards today so I'll be happy to test this one for you today or tomorrow

I got boards like this one: www.ebay.de/itm/universal-1A-lithium-battery-cell-liion-li-charger-board-module-In4-5-5-5V-USB-/330699360128
So I recon instead of connecting the leads to a battery and directly connecting it to a 510 connector would work.

[testdruif]

Or use this tutorial
No need for a board, just 1 usb cable is enough ^^

guidetovaping.com/2011/10/15/building-a-510-box-mod-passthrough/

[Method69uk]

Thank you guys

testdruif - that looks good to me.

Can you tell me if I wanted to buy a vv board, and instead of connecting it to a battery the power was delivered by a mains adaptor (like the phones used or cordless phones etc) could that be made to work? Cutting out USB altogether I mean?

[fred]

OK - so that board is rated at 1a @ 5v = 5W

Methinks it won't vape well

Also, to quote a reply from the tutorial you linked to:

jalilo February 24, 2013 at 3:59 am - Reply
bro i have tried this type of connection but the current is too low to produce good vape

[testdruif]

Aug 28, 2013 9:33:32 GMT Method69uk said:

Thank you guys

testdruif - that looks good to me.

Can you tell me if I wanted to buy a vv board, and instead of connecting it to a battery the power was delivered by a mains adaptor (like the phones used or cordless phones etc) could that be made to work? Cutting out USB altogether I mean?

Buy one of these

Input voltage = 5V so it will be enough to power the board

www.stealthvape.co.uk/electronic-cigarette-mod-parts/variable-voltage-boards/lm2596-red

[testdruif]

Aug 28, 2013 9:55:55 GMT fred said:

OK - so that board is rated at 1a @ 5v = 5W

Methinks it won't vape well

Also, to quote a reply from the tutorial you linked to:

jalilo February 24, 2013 at 3:59 am - Reply
bro i have tried this type of connection but the current is too low to produce good vape

Hey Fred,

Absolutely true
But if you use a wall adapter (2A) it will be going to 10W so that should be sufficient

[fred]

testdruif

As I said, i'm no electrical engineer, but as far as I'm aware, it doesn't matter how much current you throw at that board, it will still only output 5V @ 1a.

[testdruif]

Then I really wonder what they put into those usb only passthrough thingies as they only operate via usb (computer or charger) and work just fine

[fred]

Aug 28, 2013 11:32:45 GMT testdruif said:

Then I really wonder what they put into those usb only passthrough thingies as they only operate via usb (computer or charger) and work just fine

Aug 28, 2013 9:14:46 GMT fred said:

.......

Personally, I don't get how passthroughs can really work when connected to a computer. USB spec is 500ma, which is nowwhere near enough to power a PV - but I'm no electrical engineer  - just kind of remember ohms law  from some time back (maybe ohms law is updated for the new millenium? )

It's not something I'm familiar with - I know they do ego-type passthroughs which include a battery - so the battery is on charge, even when being vaped.
If my logic (& I'm no Vulcan) is correct, you could theoretically run it out?

But are there devices available as "passthrough-only" (ie no battery)? On a computer that adheres to the USB spec, such a device would be limited to 5v @ 0.5a - thus producing only 2.5W?

Maybe raid2506, Mev, or markm (sure he used to have mod-maker status) could shed some light?

[Mev]

The battery passthrough type are not actually passthrough, they use the battery to power the unit but if plugged in the battery can be charging at the same time.

[raid2506]

I have made plenty of PT mods which run direct from PC USB out.

A straight connection of USB +/- to the 510 connection will give you 5v and I run my own PT's at that. It's a bit high for some folks though.

You won't get them to work as VV though, you will want a 2a minimum which you can get from a USB mains hub.

A simple resistor bridge or diode chain down to 3.8v still needs the bigger amps.

[raid2506]

Aug 28, 2013 11:28:08 GMT fred said:

testdruif

As I said, i'm no electrical engineer, but as far as I'm aware, it doesn't matter how much current you throw at that board, it will still only output 5V @ 1a.

That board has a rated output of 2a max (3a with heatsink)

[raid2506]

Aug 28, 2013 11:32:45 GMT testdruif said:

Then I really wonder what they put into those usb only passthrough thingies as they only operate via usb (computer or charger) and work just fine

A commercial USB PT charges the battery at about 5v and 420mah and you draw power from the battery as normal.

They are not true PT's though, more like a trickle charger.

If you chain vaped constantly for about 20 hours you could deplete the battery and would then have to wait for it to charge.