Data sheet for strobe mode on flashlights ?

Externet

Well-Known Member
Hello.
Want to delete the annoying strobe mode in my scuba flashlight. Is there data sheets of several chips/ways that stupid effect is produced ? Seems to be nearly on every flashlight in the market to the point of hard to find one without such. There is several videos but many styles.
It is powered by >4V, not 1.5V (no boost)
 
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They use either a dedicated chip or a micro. You're stuck with the strobe mode. Some don't have it – finding one without it is the option.
 
Finally able to read the annoying tiny part number on it, it is a YN890X, of unobtanium? SOT23 data sheet. The driver chip I want is YN8C9A. If cannot modify, will have to search for that YN8C9A chip.
 
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If a μC needs a crystal, well it is not. Flashlights in the market mostly use this crap to drive the LEDs with a tiny mosfet inside, as the crappier tact switches are unable to handle currents. That posted link was not easy to find. And there is more chip types of the same SOT23-6,-8 for multiple LEDs...
 
Externet said:
If a μC needs a crystal, well it is not.
Click to expand...
Most, if not all of the MODERN microcontrollers include an internal integrated oscillator, to reduce component count.

But to your point, I do agree that this particular case it is a dedicated IC.
Very likely there is a key press sequence, I. E. a pair of long presses, that would allow the LED to turn on continuously. Very likely the datasheet describes the functionality, but you will have to use a translator to read the Chinese language descriptions.
 
Externet said:
If a μC needs a crystal, well it is not.
Click to expand...

They don't, many (most?) microcontrollers have internal oscillators, with the capability of using external crystals is greater accuracy is required.

The Microchip PIC10F200 series are available in six pin SOT23, but the power pins don't match up - and I doubt it has the capability to power a high power LED directly. Due to it's lack of pins, an external crystal isn't an option


Presumably it's a custom chip just for that job?.
 
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