Re: is there a way to increase the light of an LED with a dial?


"Michael Kennedy" <mikek400remthis@xxxxxxxxxxx> wrote in message
news:4JudnT1vx6hOQwvanZ2dnUVZ_qmlnZ2d@xxxxxxxxxxxxxx

"James Sweet" <jamessweet@xxxxxxxxxxx> wrote in message
news:Y7Alj.8931$4b6.560@xxxxxxxxxxx

"Victory" <bionicbuddha@xxxxxxxxx> wrote in message
news:ab24aa3c-3838-4c03-b20d-0b9db6f6c09d@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I guess I am looking for a dimmer or something for it - just a dial
that can turn the light up to full or down a little depending on what
I want. But I want it to be controllable with a dial or something. I
hope that is clearer.
Thanks for the quick response and looking forward to the next one!



You want a variable resistor. The value depends on the particular LED but
you might try 2.5K or 5K.


Yes, James ie right. You don't want a varible resistor like I said. You
want a variable resistor. haha. I'm terrible at typing.

Mike


It may not work with a simple variable resistor because at higher settings,
the current will increase enough to probably just burn out the small piece
of the pot track that's still in circuit. A fixed resistor will also still
be needed to limit the full brightness current. In order to get a decent
control range, without risk of over-running the pot's track and wiper, I
would suggest that a small transistor needs throwing into the mix to control
the LED current, whilst the pot is left the low-current job of controlling
the transistor's base. If I get time today, I'll give it a try.

Arfa


.

Relevant Pages

  • Re: is there a way to increase the light of an LED with a dial?
    ... You want a variable resistor. ... small piece of the pot track that's still in circuit. ... to get a decent control range, without risk of over-running the pot's ... LEDs exsisted too. ...
    (sci.electronics.repair)
  • Re: is there a way to increase the light of an LED with a dial?
    ... You want a variable resistor. ... small piece of the pot track that's still in circuit. ... to get a decent control range, without risk of over-running the pot's ... Depending on what rail voltage he's figuring on running it ...
    (sci.electronics.repair)
  • Re: Timewave ANC-4 question!
    ... kills the noise and if you blinked at that moment you missed it ... variable resistor is not linear and the abrupt change you see it due to ... <<the control is good, it is on all the units prob a non linear ...
    (rec.radio.amateur.antenna)
  • Re: is there a way to increase the light of an LED with a dial?
    ... that can turn the light up to full or down a little depending on what ... You want a variable resistor. ... small piece of the pot track that's still in circuit. ... to get a decent control range, without risk of over-running the pot's ...
    (sci.electronics.repair)
  • Re: is there a way to increase the light of an LED with a dial?
    ... You want a variable resistor. ... small piece of the pot track that's still in circuit. ... to get a decent control range, without risk of over-running the pot's ...
    (sci.electronics.repair)