1k giveaway - ended

1000th post (took me long enough, I have a 3 digit user number...), time for a giveaway. The prize is a Yupard 16340, modded into an RGBW light. The LED (XML color) is more worth than the host, but it's a nice little host, and I have two of those for myself. I (DrJones) made a second account for managing this giveaway.

To participate, you
* must have joined BLF before or on 2015-12-31
* choose a decimal number bigger than 0 and less than 1000. It may contain a decimal point and up to 4 decimal digits behind it.
* write a PM to this account (DrJones' Assistant) with just your chosen number as subject.
* must PM only once
* must not post your number here or anywhere else publicly, nor comments about how to choose a number.

The giveaway will be open for around a week. When it ends, I will take the median of all qualified PMs, and the number closest to half of that value wins.


Giveaway ended. The median is 234.0089, and the winner, who got closest to half of that number, is mapache. Gratz!

There were 92 qualified entries, 17 above 500, 25 in the range of 250 to 500, 18 in the range of 125 to 250, 12 between 62 and 125, 13 below 10.



...and as a bonus I'll give instructions to unlock a secret easter-egg mode built-in to all my RGBW drivers (so that's only interesting for those who have one). It's quite fun and amazes the people I demonstrate it to. However it'll be not easy:
First collectively answer the technical/physics question below by posting here, discussions are welcome. Once someone posts the correct answer, I'll post a riddle containing the easter-egg instructions. Solving that is the second step. The third step is to find out what that mode actually does... For steps 2 and 3 having such a light is quite helpful.

So here's the question for the first step:
I have a Skilhunt H02R modded with an RGBW driver and XM-L color. when running at intermediate brightness levels, it makes a beeping noise. Why?
There are a few explanations why flashlights make noises, but I want the main reason answer specifically for that light.

Devious giveaway, I like it!

PM incoming….

PM sent.
Cool GAW
Thank you.

pm send,thank you.

Congratulations on the 1000 posts full of good content.
Those rules are evil!
I will not join because I have a nice light with one of your great RGBW drivers already. :slight_smile:

Welcome to BLF! congrats on your 1000th post… wait! What? You only have 1 post!!!

thanks

about your question, PWM sounds are not described as beeping. I have no idea why it would beep on medium mode, but am curious

Please count me in.
PM sent.
Thanks

djozz: But you may probably interested in the easter egg mode :slight_smile:

DELETED

Have Fun :slight_smile:

Please don’t discuss that… See last rule.

Hahahahhah! I just screwed up the entry. Damit.

PM sent…thanks!

PM sent

Pm’d, thanks for the chance of owning one of your lights!

Doubt I’m smart enough to figure out any technical questions YOU would have, buut I’ll try…

I would say poor ground but since it is a light you designed that way on purpose… With the skilhunt being a headlamp, it probably auto ranges to keep the light a controlled temp and beeps to let you know when it’s reached it’s lowest mid range setting without overheating? Don’t want a light strapped to your forehead getting too hot!?

Sounds like induction resonance

Nice idea for a giveaway, thanks :slight_smile:

The noise is caused because the driver is switching on-and-off really quickly in the Khz range, which makes the dual springs in the light resonate. (I think!)

Thanks for the giveaway :slight_smile:

Those rules are pure gold. Thanks for the chance! :smiley:

Partial hit in the bonus question. It’s not resonance though (at least not what physicists call resonance); and why just in this light? My other lights don’t have that.