I saw this youtube video by David Sunshine posted a couple days ago and was blown away by it. He covered just about everything and spent a lot of time editing it with graphics and charts. I love this type of detailed info. Its a long 42min video, but its really good.
I’m surprised it doesn’t have more views. Its been up for a few days and is only at 257 views.
I guess he’s not a member here yet, but he’d fit right in. He really knows his flashlights and has been bitten by the bug.
That was a very good review. The Viso Systems iOS app he uses at 22:25 works well for detecting low frequency PWM after calibration, but is a bit iffy at high frequency PWM and switching noise. It is imperative to use a diffuser so that the light fills the camera imager completely.
Here’s the notorious BLF D80 (accurate)
Reylight Pineapple (accurate)
Zebralight SC5Fc is more difficult, since it doesn’t use PWM but there’s noise in the output
First it fails at detecting the frequency correctly, probably because the light doesn’t cover the whole width of the image
Then it reads just a bit low (scope reports 2.91 kHz)
All in all, I’d say it is a great tool if you just need to know if there is flickering and a little info about the frequency and amplitude.
cd, firstly check your tail amps ,on turbo, if their only 2.4 –2.6 then you could look up the last couple of reviews on this torch re R050 and R100 resisters and blob of solder mod
if your amps are around 5 amps on turbo then all is good
Well, I’ve seen reference to the resistor mods on the reviews. Was just wondering where this “blob” of solder gets placed if it’s not part of the resistor mods.
Measuring tail amps, guess I’ll have to try and search for how to do that……all I have is a relatively inexpensive DMM, no clamp meter or such.
I think it’s pretty cool such measurements can be taken with a smartphone, even if its somewhat limited. I’m on Android, and unfortunately it doesn’t look like that app is availible in the play store.
A very nice and detailed review… Sound reproduction is good. Was considering a L2 but after going thru the review, I’d rather get this. I’ve skipped its sale, regretting not getting one now…