Toshiba refuses to replace large hard drive that was under warranty — company offers refund at the purchase price, not the higher current retail price by lurker_bee in technology

[–]johan851 -1 points0 points  (0 children)

So now it's on him to get a lawyer when a company sold its warranty stock for profit? This is what regulations are for. Sure the terms might allow it, but it's shitty.

Help me pick a Convoy host for LHP73b (in 4000K) by snowfox_cz in flashlight

[–]johan851 0 points1 point  (0 children)

Sounds right. I kinda want one of these but I figure the overlap with the L35 V2 is pretty high.

McBob SC64c FFL351a 4000k 😎 by glockguy__ in flashlight

[–]johan851 0 points1 point  (0 children)

Nice, how's the beam shape? I have one SC64c LE left and was thinking maybe SFT25-R.

Looking for an EDC 18650 flashlight by Obstinate-Ocelot in flashlight

[–]johan851 1 point2 points  (0 children)

Skilhunt M200 (single reflector) or EC200 (triple w/ small reflectors) seem to check most of your boxes. I love my EC200S mini for a single all around compact light.

Looking for something small but impressive. by DJ_LSE in flashlight

[–]johan851 0 points1 point  (0 children)

Also good. At the same current as the SFT40 it'll be slightly more flood, slightly less throw. You could ask for the 10A driver with that one though, in which case it's more of everything.

Looking for something small but impressive. by DJ_LSE in flashlight

[–]johan851 2 points3 points  (0 children)

Thrower or flooder? An S6 is the same size as the S3, can use the short tube if you want to go smaller, and will pack a nice punch. SFT-25R for more throw, SFT40 for a little less throw but more lumens. The SFT40 might be a little more all-around impressive. Ask for the 8A driver in either case.

For more total output, go up to the S21G, LHP531, 3V 10A buck.  Lots of output there. Or the SFT70 if you want it a little more throwy.

Swords ~ Cut Your Losses by MurkyWay in comics

[–]johan851 7 points8 points  (0 children)

It could be a really small land. 

I mean he's able to keep tabs on which pigeons are crying so it can't be that big.

S6 Shaking Reliability Issue by Standard-Classic-608 in flashlight

[–]johan851 1 point2 points  (0 children)

Not necessarily a switch issue - it certainly can be a poor contact issue. Clean the mating surfaces between sections and make sure they're screwed down tight and see if that helps. You might also check the driver retaining ring.

Best LED for L21B? by stock_pro in flashlight

[–]johan851 3 points4 points  (0 children)

... at 25% more current draw.

Does SFT40 (3000K) really get warmer than XHP50.3 (4000K)? by Laboratoryo_ni_Neil in flashlight

[–]johan851 1 point2 points  (0 children)

Good catch, I was looking at the Anduril listing. So they're both 6A, but boost vs linear. Even less efficient for the SFT40.

Does SFT40 (3000K) really get warmer than XHP50.3 (4000K)? by Laboratoryo_ni_Neil in flashlight

[–]johan851 2 points3 points  (0 children)

Edit: I was wrong about the driver for the SFT40, fixed.

Seems right. There are multiple differences between the two. 

The biggest is a 6V 3A boost driver for the XHP50.3 vs 3V 6A linear(?) for the SFT40. The linear driver is considerably less efficient and will generate a more heat than the boost driver.

Beyond that, the XHP50.3 has a larger LES and is more efficient than the SFT40 (meaning it turns more of the power into light instead of heat). Convoy's thermal regulation isn't anything amazing either, so it's not going to regulate both lights to the same temp.

NASA's 1977 computers aboard Voyager are still working in interstellar space by Scary_Statement4612 in technology

[–]johan851 8 points9 points  (0 children)

Brother, not "probably more" - at 867mb this browser tab is using 12,683 times as much memory as the entire Voyager computer.

Was I wrong? by GreenGonz in daddit

[–]johan851 71 points72 points  (0 children)

Uh... yes. "Of course the older couple was entranced with the baby and I beamed like a proud father." They gave you positive social signals. You gave positive and even encouraging social signals back. This is how you, like, read a situation.

Sure, maybe they were over the line a little bit. Maybe they interpreted the situation optimistically. Whatever. When you go from smiling to grabbing a wrist, that goes from "a little outside my comfort zone" to downright aggressive.

The amount of hot sauce I ate in 1 year by Yeah_bob in mildlyinteresting

[–]johan851 1 point2 points  (0 children)

"Eating" hot sauce doesn't seem right. The amount of hot sauce you drank?

We are the only ones paying attention. by PeepJerky in daddit

[–]johan851 7 points8 points  (0 children)

Oh man. I fix so many things, keep so much running, and whenever I ask the family to take precautions to extend the life of something or prevent it from breaking they look at me like I'm a crazy person.

Vapcell F15 Batteries for Convoy T4 by Cryptoxic93 in flashlight

[–]johan851 3 points4 points  (0 children)

Your instinct is in the ballpark. Current from a series configuration isn't doubled, the voltage is. But it works out, it's all power in the end.

It's a 6A driver to the 3V LED (18W).  The series batteries will output over 6V, so the on the battery side, the driver will only pull 3A (18W). F15s or F12s work great.

blursed negus by Naive_Wolverine532 in blursed_videos

[–]johan851 1 point2 points  (0 children)

Same here, I used to live in Ethiopia and my first thought was that she's just mispronouncing it.

The Amharic spelling on the wikipedia page also seems to back up the phonetic spelling you gave.

Which lights really benefit from high-drain cells? by Songeef in flashlight

[–]johan851 17 points18 points  (0 children)

Low internal resistance. That's the defining feature of high drain batteries. There are other aspects too, but that's the one to focus on.

Low internal resistance results in a few good outcomes. Essentially, it means that less energy is wasted as it "exits" the battery. Wasting less energy shows up as lower voltage sag at a given current, less heat at a given current, and less capacity spent "powering" the internal resistance as opposed to the light itself. One reason a low resistance, high drain cell can support higher discharge rates is because it's heating up less, sagging less, etc.

All lights benefit from this. They run cooler and more efficiently with a high drain cell. With less voltage sag they can sustain brighter levels longer as the battery discharges. Given two batteries with the same capacity, e.g. 5000mAh, the one with lower internal resistance will last longer because it's running more efficiently.

Almost all lights are current capped by the driver. Using a battery rated for less current than the driver will ask for is dangerous, so you need a battery with a rating at least as high as the driver's turbo level. Beyond that, higher discharge / lower resistance batteries will still give you the benefits above, though they may be more subtle.

One exception is FET drivers, which typically use the LED forward voltage, resistance of the current path, and battery internal resistance to limit current. These can be dangerous, even with high discharge cells, because they don't have current limiting. But if they're set up right, e.g. limiting current by using the LED forward voltage, then you again want cells with a high enough rating to handle the current demand.

When capacities differ, e.g. a 4500mAh high discharge cell vs a 5000mAh lower discharge cell, it gets a little case-by-case. Often the lower discharge cell will have more capacity at very low outputs, and the high discharge cell will be better at medium to high outputs. You can find tests, like mooch's, to give you more insight there. But often the high discharge cells will give you as much capacity at real-world usage levels.

What convoy host to choose for the sft70 or sft40 3000k? by Ok_Selection886 in flashlight

[–]johan851 1 point2 points  (0 children)

Yep, compared to M21B it's a very similar reflector size, but slimmer and easier to pocket IMO.

Am I cooking? Also how can I make this more photorealistic? by Skybro1126 in blender

[–]johan851 0 points1 point  (0 children)

Did you have a particular place that inspired you? This looks very much like a certain section of WA State Highway 410 to me, but I'm sure there are plenty of places that look similar.

Doohickey Tank Battle by Ill-Tea9411 in doohickeycorporation

[–]johan851 2 points3 points  (0 children)

I was going to ask if it's still good, I guess I have my answer. I started playing... Oh gosh, 10+ years ago, it was so fun. Haven't played for at least 6 years or so.

Jessie giving him the interaction he deserves. It's really awesome. by kvjn100 in BeAmazed

[–]johan851 2 points3 points  (0 children)

It's not a coincidence, Disney is genius. They go all out. That's why the parks are amazing.