Spey said: ↑
Silverrado58,
Curious why v3.04 vs v3.14 ??
Assuming you simply have no need for 200w vs. 150w ?
Appreciate your considerations related to running Cuboid firmwares that allow user access up to 200w vs firmwares that limit to 150w.
So that you, and others, don't "assume" danger related to this mod I will comment on the two conditions you reference, with an end goal being why would someone might (me in this example) choose 150w vs 200w firmware option or vice-versa.
I am going to relate back to #1 above as it relates how resistance plays a roll. The dripper I am currently running on one of my Cuboid's has a total resistance of 0.14ohms. If we calculate ohm's law with the two knowns/constants 0.14 resistance and 25a power capacity we arrive at a max voltage of 3.50v and max wattage of 87.50w (this is pretty close to how I vape this atty on any of my single 18650 mech-mod's). 3.5v on a pair of 18650 running a low resistance build is conservative in my mind.
If we adjust the resistance of the atty (using the same power max of 25a) towards a goal of using the full 200w we must build increase the resistance up to around .32ohms. If we calculate ohm's law with the two knowns/constants 200w and 25a power capacity we arrive at a max voltage of 8.00v (same as #1 above) and required resistance of .32ohms. Running 8.0v on a pair of 18650 running a medium/high resistance build is pretty conservative in my mind.
150w Firmware vs. 200w Firmware
Now to bring this to a close, as your post more or less was related to questions about anyones choice of firmware, and whether they should choose one over the other (150w vs 200w options).
In my first example above (current build 0.14 resistance) the Cuboid will perform the same regardless 150w or 200w firmware because with a 25a limit the max wattage will be 87.5w (within the capacity of either firmware option).
In my second example (higher resistance builds) if we plug into ohm's law this new constant (150w and 25a power capacity we arrive at a max voltage of 6.93v (less as #1 above, indicating we are not using the full capacity of the mod). So, to extract the full capacity of the mod (with consideration the resistance if a factor) we go back to ohm's law as we did in the 200w example above (but use 150w this time). If we calculate ohm's law with the two knowns/constants 150w and 25a power capacity we arrive at a max voltage of 6.00v (less than #1 above) at a resistance of 0.24ohms.
The answer (from my perspective) 150w vs. 200w firmware option Cuboid:
Silverrado58,
Curious why v3.04 vs v3.14 ??
Assuming you simply have no need for 200w vs. 150w ?
Appreciate your considerations related to running Cuboid firmwares that allow user access up to 200w vs firmwares that limit to 150w.
So that you, and others, don't "assume" danger related to this mod I will comment on the two conditions you reference, with an end goal being why would someone might (me in this example) choose 150w vs 200w firmware option or vice-versa.
- "200w on two 18650s is a lot." I would say not necessarily ... as watts alone is not really a measure of power (V x A = W). Additionally, the resistance of the load (total load of the atty - coils, connections, etc.) play a factor. I am going to try and bring our references here back directly related to the Cuboid. The Cuboid (regardless firmware 150w of 200w) has an output limitation of 25a. Extrapolation of the formula using the highest wattage firmware (V x 25a = 200w yields 8v max for two batteries) illustrates 4v max load (per battery) for the device.
- Low Voltage Protection - Partially discharged batteries exceeding cdr > The Cuboid has a low voltage protection circuit that steps down the discharge voltage (power to the atomiser) when battery voltage is low. When vaping, you can watch the display and see the actual output voltage drop which is also noticeable in the amount and temperature of vape. the Cuboid does not stop you from vaping, it simply steps down the vape. It this way it gives the users the option to simply adjust the settings lower to keep consistent vape experience (one hit to next). If user ignores, the cuboid will auto step-down the vape (reduced vapor).
I am going to relate back to #1 above as it relates how resistance plays a roll. The dripper I am currently running on one of my Cuboid's has a total resistance of 0.14ohms. If we calculate ohm's law with the two knowns/constants 0.14 resistance and 25a power capacity we arrive at a max voltage of 3.50v and max wattage of 87.50w (this is pretty close to how I vape this atty on any of my single 18650 mech-mod's). 3.5v on a pair of 18650 running a low resistance build is conservative in my mind.
If we adjust the resistance of the atty (using the same power max of 25a) towards a goal of using the full 200w we must build increase the resistance up to around .32ohms. If we calculate ohm's law with the two knowns/constants 200w and 25a power capacity we arrive at a max voltage of 8.00v (same as #1 above) and required resistance of .32ohms. Running 8.0v on a pair of 18650 running a medium/high resistance build is pretty conservative in my mind.
150w Firmware vs. 200w Firmware
Now to bring this to a close, as your post more or less was related to questions about anyones choice of firmware, and whether they should choose one over the other (150w vs 200w options).
In my first example above (current build 0.14 resistance) the Cuboid will perform the same regardless 150w or 200w firmware because with a 25a limit the max wattage will be 87.5w (within the capacity of either firmware option).
In my second example (higher resistance builds) if we plug into ohm's law this new constant (150w and 25a power capacity we arrive at a max voltage of 6.93v (less as #1 above, indicating we are not using the full capacity of the mod). So, to extract the full capacity of the mod (with consideration the resistance if a factor) we go back to ohm's law as we did in the 200w example above (but use 150w this time). If we calculate ohm's law with the two knowns/constants 150w and 25a power capacity we arrive at a max voltage of 6.00v (less than #1 above) at a resistance of 0.24ohms.
The answer (from my perspective) 150w vs. 200w firmware option Cuboid:
- If you always build below 0.24ohms; it does not matter (performance equal).
- If you build above 0.24ohms; the 200w firmware will give you additional power to run higher resistance (aka - series builds). With 0.31 - 0.32ohms being optimal from my experiences (as I have never actually seen 25a - always slightly less).
- For me; I occasionally run above 0.24ohm atty's (high mass wire builds for superior wicking and atomization of juice) and I appreciate being able to vape at higher temperatures for various reasons > the 200w option reduces firmware limitations on the hardware and is my choice. Admittedly, I typically run lower resistance builds that also perform well on my mech-mod's, but I default to it making no sense to have firmware that limits hardware performance ;-)
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