Videos on How to Measure Lumens and How to detect PWM.

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mhanlen
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Videos on How to Measure Lumens and How to detect PWM.

I made a few videos that may interest newer BLF members. One about PWM and one about how to measure lumens. Sorry about the thumbnails… I’m trying to figure out if stuff like that makes a difference in SEO (Search Engine Orientation). Also there’s a little bit of NSFW language in the video, mostly because I’m immature.

How to measure lumens and candela.

Edited by: mhanlen on 04/17/2017 - 09:32
MRsDNF
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Thanks for the informative video. You can also use the stream we all make several times a day to check for PWM.

My current and or voltage measurements are only relevent to anything that I measure.

Budget light hobby proudly sponsored by my Mastercard and unknowingly paid for by a hard working wife. 

djozz said "it came with chinese lettering that is chinese to me".

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.

 

Tjohn
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What they both said !!!

Bump (Because there are always new members joining BLF…)

Is Toykeeper planning some type of Configureable Limbic Entanglement Via Wireless Optical Programming for the FW3A from her perch on her asteroid moon?

Lightbringer
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MRsDNF wrote:
Thanks for the informative video. You can also use the stream we all make several times a day to check for PWM.

PeeWM?

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

WillyD
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Thanks mhanlen. I just tried the faucet method…quick and easy.

MRsDNF wrote:
Thanks for the informative video. You can also use the stream we all make several times a day to check for PWM.

I’ll make sure to use that method when testing my next giveaway light Wink

ARsee
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PeeWM

ubnoxious

 

 

Lightbringer
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ARsee wrote:

PeeWM


ubnoxious

Hey, he walked right into that one. Big Smile

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

mhanlen
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I have a few one liners, lined up but I’ll try to keep it clean. Thanks guys!

Tom E
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Nice job on this. Didn't realize the "pipe dream" was so popular. For PWM measurement, I've measured it precisely using a clamp meter on a scope - it's the ultimate way to measure PWM frequency, but requires pricey tools and needs access to a LED wire you could clamp around.

This describes a simple way to precisely measure PWM frequency, but not sure it has the resolution we would need: http://hackaday.com/2014/11/26/easy-and-effective-way-to-measure-pwm-without-a-scope/

I'd like to measure up to 20K and not sure the piezo feeding the FFT app on an Android would be capable of that.

mhanlen
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Tom E wrote:

Nice job on this. Didn’t realize the “pipe dream” was so popular. For PWM measurement, I’ve measured it precisely using a clamp meter on a scope – it’s the ultimate way to measure PWM frequency, but requires pricey tools and needs access to a LED wire you could clamp around.


This describes a simple way to precisely measure PWM frequency, but not sure it has the resolution we would need: http://hackaday.com/2014/11/26/easy-and-effective-way-to-measure-pwm-without-a-scope/


I’d like to measure up to 20K and not sure the piezo feeding the FFT app on an Android would be capable of that.

I’d like to measure color temperature, precise PWM, and accurate tailcap amperage. But a lot of that requires me to drop a bunch of money and spend hours learning new equipment (in some cases). Looks cool though!