LED Based Handycam Light

12

Sanjiv Dutta saved some money when he decided to make this LED Based Handycam Light instead of going to the store and buying one. It looks very bright and based on the pictures on his site (scroll to the bottom) it seems to work very well!
"I have come with a naive solution, but a working one. I put resistors to drop the supply voltage when needed, by means of a 3 position switch as described in the Ckt. below. Lets see the current & voltage delivered to the LEDs that way:- It was found that , when voltage across LED = 3 v, current consumption = 20 mA approx. And for 3.1.v, it becomes about 22 mA. For 20 LEDs, that is = 440 mA Hence, if Supply voltage is 3.6 v, voltage drop needed across the resistor = 0.5 v. Again, when Supply voltage drops to 3.3 v, voltage drop needed across the resistor = 0.2 v. We do not need any resistors when Supply voltage further drops to 3.1 v or 3 v. Thus we found out the required resistor values."

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12 Comments


  1. Site is down 🙁 are those 10mm LEDS?


  4. Do you have schematics for this?


  5. Yes, 10 mm. I have schematics, but withdrawn later to hide from some unthankful greedy ppl.
    Kevin pl. gimme your e-mail id I wil sent it directly.

    Have u anyway saw the whole article on geocities.com/san011070/site/LED_light.htm ?

    Bye…& Thx


  7. led? not using IR? I`m intrested in using ir, and take out ir pass filter from yhe camera.
    please email me,i want to know :=)


  10. Kindly send the cct of handycam led light


  11. The old link was to a geo cities site. I found the new site and updated the link. Looks like the creator sends it out by email.

Comments are closed.