IPV4 preorder

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TheBloke

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^^^^^^^^^do you use the Joul's the same as wattage......i mean is 10 J like 10 watts?

sounds great man, enjoy!

While waiting for yours, I'd recommend watching pbsuardo's SX Mini M Class review (part1, part2), where he spends a while talking about Yihi TC and Joules. In short, from what I gathered there, yes Joules is pretty much just like watts. His scope readings showed that different joules just indicate different DC power levels, basically no different to setting a watts level on the dna 40, except obfuscated because 40 Joules != 40 Watts.

His conclusion, which I quite agree with from what I've seen (without actually using any Yihi TC device yet), is that Joules is a pointless complication.

I think someone even suggested it might be for Patent reasons - like Evolv had TC with Wattage patented so they had to suggest they were doing it differently? I have no idea if that's remotely accurate, but it would explain why they have seemingly complicated things with a needless new measurement which is basically no different to watts.

Unless it's meant to be a branding thing - if their TC becomes popular, people associate "TC" with "Joules" and so they think "Yihi". Bleurgh.
 

Fictitious Character

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So what's the deal with this 9v charger not being included? It's going to be a separate accessory, I suppose? And this happened with the IPV3 as well? That's pretty shoddy after all the fuss of it being a separate charger in the first place.

Though I expect I've got a bunch of 9v DC chargers lying around with the right polarity and enough amps, so I can't imagine I (or many of the rest of us) would need to actually buy one - it's just a standard 3.5mm port isn't it?
Same scenario as the ipv3, but the ipv4 at least do not require a tool to remove the plastic taco.

I wonder how that screen looks in the sun/light? It looks like it'll be pretty tough to read in direct light.
I would think pretty damn difficult. I had trouble seeing the ipv3 screen in sunlight and imagine this one is worse. I hope I am mistaken

the ipv4 is quite impressive. i own 2 DNA40s and this is kinda making me forget about them lol.
That sounds great to hear as I know that is a lot of ppl's opinion on the M class board including my own, so to hear a dna40 user say the same thing about the ipv4 I find that to be good to hear. Yihi is on a roll.
 

AgentZen

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So what's the deal with this 9v charger not being included? It's going to be a separate accessory, I suppose? And this happened with the IPV3 as well? That's pretty shoddy after all the fuss of it being a separate charger in the first place.

Though I expect I've got a bunch of 9v DC chargers lying around with the right polarity and enough amps, so I can't imagine I (or many of the rest of us) would need to actually buy one - it's just a standard 3.5mm port isn't it?
If they didn't include a charger I would not want to be the guy who tests to see what happens when you plug one in. I think it's safe to assume there is probably a good reason they didn't include a charger.
 

TheBloke

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thanks, so it's basically another word for the same thing.....i will watch the video.

Yeah, in effect - they're both measurements of increasing power to the atty. Watts is a basic measurement that we all understand, clearly understandable as being voltage into ohms. Joules is not clearly understandable; it's not exactly another word for watts (1J != 1W) but it's basically the same thing overall. It's a scale for measuring increased power.

We all understand watts, we're all used to certain watts readings and what that means in terms of the strength of hit. But the Yihi TC can go up to 60W, but the Joules scale only goes up to 50, so it's not a clear 1:1 and now we have to learn what certain Joules numbers mean and how that varies. Maybe it's just 1J = 1.2W (60W into the 50J scale)? If it is, that would really prove how pointless this J scale is, and how it must be either patent or branding, not any technical justification :)

pbusardo has a bunch of scope readouts on his Taste Your Juice website which might help explain it a bit better. It'd be interesting to see for example whether it's linear - does 40 Joules give exactly twice as much power as 20 Joules? That might be hard to tell of course, because Joules are only operational in TC mode and therefore the power supplied at any given moment will be dependent on current coil temperature (resistance.)

Anyway, all this is why it seems pointlessly complicated :)

I'm sure in practice it's going to be fine. We'll quickly find a couple of Joules settings that work and just use those - just like I currently set my DNA 40 to either 40W or 30W for 99% of my TC vapes, and vary my TC vapes much more with the temperature setting than I do with watts. (And that's why it's a big shame the Yihi chips don't have memory settings for temperature rather than Joules, but that's a whole different point!)
 

TheBloke

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If they didn't include a charger I would not want to be the guy who tests to see what happens when you plug one in. I think it's safe to assume there is probably a good reason they didn't include a charger.

I'm sure there's a good reason they didn't include it - either it wasn't ready, or they want people to pay extra for it! :)

As for a good technical reason? Maybe? I can't claim to be any expert on DC circuits, but I was pretty sure that any complication in how they charge would be in the charging board, not the power supply which just has to supply 9V DC at a certain amps rating. Maybe that's a really high amps rating, more than most common 9V chargers? I don't know. But if I hear that the charger requires 9VDC with a certain polarity and a certain amps, and I can find (or have) a charger that supplies that, I will likely try it! (I might stand back a bit :p :) )
 

TheBloke

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Oh, I may well have an answer already on the charger. I just remembered that I've seen the Yihi 9v charging boards on a mod making site:

ModMakers.co.uk said:
At long last, we've got our hands on these balanace charger boards.
They are capable of charging series Lithium battery configuration in balancing mode so no need to keep taking your batteries out of your mod.

- Balance charging supports dual battery 4.2v and has charging output of 450mA per cell.
- 2 LEDs indicate status of each battery separately.
- During charge cycle each LED will be red and turn off separately as each battery completes its charge.
- Requires a 9V wall adapter with 3.5mm barrel connector. NOT SUPPLIED

This tells me:
  • It's almost certainly a standard 9V wall adapter - else they'd have said it needs a special one, and not just referred to it as "a 9V wall adapter", i.e. any generic one. They don't list the amps but I'm sure that's easy to find out. (Maybe it's just 1A as that's slightly more than the output to the cells?)
  • That far from being 2A charging, it's "450mA per cell", so less than 1A total, and less than 500mA per battery! Wow, how crap! So yeah, no, I won't be bothering with this I think; that makes my Luc charger four times faster.
  • How disappointing! I was sure there was an argument earlier in this thread about how the 9v charging was going to be better because it would be 2A, where USB charging would not be because most people don't have 2A USB ports etc etc. Maybe that was based on assumptions, or bad information from Yihi or Pioneer4You.
 
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sando7

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Petabread, i thought the same thing on my first Ni build, what i have discovered is that i like a higher resistance between .23 to .28 with T.C.(more surface area), now i'm getting what i want....i also switched over to TI but that's another story in another thread.
and it's the same on all three of my T.C. devices (all clns).
 
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