I bought this head torch locally to see how the non-focussed output would look in a dark room. It's an interesting effect. Instead of a focussed beam of light in front of you, it's a gentle wash of light over the whole room.
The little six pin chip that controls the LED modes has a slightly vague number that could be A25B or A256.
The button has a 470 ohm pull-up resistor, and the LEDs are driven via two 6.8 ohm resistors in parallel. (3.4 ohms)
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm

12 thoughts on “Inside a cob led head torch.”
  1. Avataaar/Circle Created with python_avatars PRENOSI says:

    Some china flashlights will have hidden SOS Mode.Activation this mod is possible by holding few seconds power button if flashlight is on.

  2. Avataaar/Circle Created with python_avatars Gabriel Sansar says:

    AND>>>>>>>>>>>>>>>>>>>> totally `forgets` to show it lighting a bloody room !!!!!!! ?

  3. Avataaar/Circle Created with python_avatars Madhumita Sarkar says:

    AA or AAA batteries?

  4. Avataaar/Circle Created with python_avatars Andrew Howden says:

    I use mine for reading, but it eats batteries now I know why !

  5. Avataaar/Circle Created with python_avatars Lucy Am says:

    hi there

    some of those cob led torches got hidden sos light pattern. if you press clicky soft switch and hold it it should start flashing …- – -… at least one that come from homebargains do it.

  6. Avataaar/Circle Created with python_avatars Hola! open defecation says:

    I am going to mod one of 6 LED with Q5 18650 into COB Q5 LED. Will be interesting

  7. Avataaar/Circle Created with python_avatars orion khan says:

    Clive's hands seem a bit jittery in this video… too much caffeine ?

  8. Avataaar/Circle Created with python_avatars webchimp says:

    Just bought one that takes an 18650. Will have to test it for lifespan when it turns up.

    edit: Headlight turned up and the listing was an (almost) total lie. Turns out it takes 3 AAA batteries. Works fine, nice and bright and the stap's a decent length, but I'm still a bit miffed.

  9. Avataaar/Circle Created with python_avatars Albert Tatlock says:

    His Shaking that everyone keeps talking about is the D.T's, he mentioned this in another video of His, something to do with distilling your own Whisky with warm white Led's

  10. Avataaar/Circle Created with python_avatars Albert Tatlock says:

    if you are not 100 percent sure, fit warm white led's

  11. Avataaar/Circle Created with python_avatars furrfu says:

    These eat through AAA batteries at a very rapid pace, btw. Even at low brightness. But it's still awesome, and plenty bright.

  12. Avataaar/Circle Created with python_avatars Jusb1066 says:

    measured mine to be 300ma and 100ma in hi-lo, so would be around 2-3 on max and maybe 9 on low

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