Fireflies ROT66 Flashlight

If we go back to post 274, I believe Lexel means that the ROT66 board will shut down all its leds as part of the lvp. Before that, the inner 4 leds (of red color) will either turn on or blink to indicate low voltage. All 3 rings of leds have trimmers so you can control the drain.

Aah, a separate controller purely to sense battery voltage. That is certainly one way to do it.

The tail LED introduced on the X5/X6 shouldn’t have needed much current (though it was set excessively bright), there must have been some additional parasitic drain due to semi-powering the driver, perhaps through the voltage divider chain (before we increased the component values and then eliminated it altogether with clever firmware).

The bypass resistor was also a heavy parasitic drain when operating at moonlight/firefly levels, consuming much more power than the main LED. I never liked it.

The Q8 was done very well I think, after the hiccup with the first faulty switch PCBs, quickly corrected.

Fingers crossed. I guess it will be down to how well the MCU firmware manages power, and how it senses the voltage (slightly worried about mention of an external resistor change to set the level, suggesting a voltage divider might have returned). The 50 uA base figure suggests it is good, if all that remains is the aux. LED current, user selected with the trimpots.

Turning off completely (?) at 3V is safe

It is ingenious.

A while back, I made firmware for a similar aux LED board in the tailcap… but as far as I’m aware, no one has ever actually built or tested the hardware. The design there was a little different though, with six LEDs going RGBRGB in a circle. The idea was that, every time the user clicked the button to turn the main light off, the tailcap would boot up, spin the LEDs for a couple seconds like a roulette board while it measured voltage, then slow to a stop at a color matching the current voltage. Red, yellow, green, cyan, blue, or purple. Afterward, it’d blink that color like a beacon every few seconds, measuring voltage periodically to update the color.

The roulette bit also served to help the user time the duration of their button presses, to more consistently get short or long presses as desired, or short/medium/long.

Blingy, I’ll admit… but also useful. Would still like to have one.

Now that would justify putting an MCU on the board. I’d certainly buy that.

Puzzled about the name, ROT66. Where did that come from ? I keep thinking ROT13 and wondering whether there is some hidden message …

Edit: and rot is not a good word in English. In other languages, this differs.

I have no idea where the name “ROT66” came from. I also have no idea where the name “PL47” came from, but it kinda makes sense… 4 emitters, 7 cm battery, and it’s shaped kinda like the letter P or L.

ssttrrettcchhhh :arrow_right:

I’m reminded of Route 66, the famous road/highway in America.

I like naming schemes which indicate what the product actually is. ZebraLight is a good example:

  • SC for a standard carry flashlight, or H for a headlamp.
  • 3, 5, 6, or 7 for 16[3]40, 14[5]00, 18[6]50, or 21[7]00 battery.
  • Sometimes a 0 to indicate, um, a different flavor? (a mule headlamp or a slightly larger flashlight)
  • Another digit to indicate the generation number. (usually, but sometimes omitted or 0)
  • Optional F for frosted lens.
  • Optional c, d, or w for high-[C]RI 4000K, high-CRI [d]aylight tint, or a [w]armer-than-default neutral white tint.
  • Optional other suffixes to indicate revision or emitter type, like “Mk IV” or “HI”.

It’s not all completely straightforward, and not all completely consistent. Like, I have no idea why the SC600 series uses “Mk IV” to indicate a 4th generation, unlike the “4” digit used for everything else. And I don’t know why the SC5 lacks a version/generation number entirely. But still, it’s more consistent than most other companies I’ve seen.

I was about to say that…

Periscope Light

Out for delivery…weeeeeeee. Hehehehe. Wooooohooooo

Awesome. Played with it until my niece swung it round & round until she snapped the lanyard. She’s not talking to me now. The light is brighter than the r9080 version. Slightly greenish but pleasant nonetheless. Super low mode. 3 of the LEDs are brighter than the rest though. Is there a way to turn off the auxiliary LEDs?

They sometimes use Rota also….
This is Googled from a Gift Shop here in Brazil.

6 and 8 are numbers that Chinese people like.

66 Everything goes well

88 More and more wealth

Hella nice. Please post your impressions on this light.

How about the Fireflies PLF 47?

I don’t have any idea.

You must ask FireFlies.

:slight_smile:

I think the only way to turn them off is to disconnect the battery. If I understand correctly, the aux LED board is connected directly to the battery, so the attiny cannot control it.

Is that the direction that Fireflies went? They didn’t wire it into the MCU controlled side switch light? I guess the easiest way to find out is if the auxiliary lights turn off and on in sync with the switch lights.

I’ll probably find out on Tuesday. I got a message from DHL about a package arriving that day, and I think it’s from Fireflies.

People were talking earlier about the ROT66 being sensitive to bumps. I wasn’t able to make mine do anything wrong though, even with fairly short cells installed. Anyway, today my ROT66 fell about 1.5m onto a linoleum floor… and it didn’t even skip a beat. No change at all in the light output, and no visible dents or scratches on it. I’m not sure the floor is completely intact, but the light is totally fine.