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.
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.