I been watching some flashlight reviews on YouTube and notice that David Sunshine test the flicker of the flashlight’s.
I been reading many reviews here but never seen you guys test the flicker.
I think it gives some good information about how the driver performs and if the flashlight is going to give you headache or tired eyes if it flickers (that’s what I have been reading here about noticeable pwm).
Just think it’s a good app to have checking your flashlights for reviews or to test new drivers.
The app is available for android and iPhone but I didn’t get it to work on my android phone (just said “not enough light”) but on my wife’s iPhone 6 it works great. (She is probably going to get crazy when I borrow her phone alot now)
To get the screenshot over to my phone I just press save and click on Facebook messenger and send it to me and I got it.
Seems it only works for iPhone (I think) and the app must be pretty much calibrated from the start (I hope) since there is not many iPhone models (Vs android) and the components is known of those phones.
To calibrate the frequency I must put the phone’s camera on a light (I must know at what frequency that lamp flickers) and type in the know flicker frequency.
yes I agree house power is at 60hz, in California
note that the two scans I posted of incandescent are reporting 100Hz and 91Hz… not consistent
if you look closely at the first two flashlight scans, although they are consistent in Hz, they are inconsistent in % flicker
the app seems to be quite sensitive, and so far I have not been able to reproduce two consecutive identical readings…
Im open to learning to improve my technique.
So far, I don’t think that the app is providing accurate info from which to determine whether a flashlight is using PWM, but if you want to learn how to detect PWM with your phone, watch the video I posted.
that technique also detects Constant Current flicker… which is much harder to detect than PWM