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



Ok, thanks for that. I just want to make sure I buy the variable
resistor that will work through the range the first time. I do not
like taking things back if I don't have to...
Does anyone know a part number for Radio Shack that will work with
what I want?

On Jan 24, 2:45 pm, "William Sommerwerck" <grizzledgee...@xxxxxxxxxxx>
wrote:
If the batteries drive the LEDs directly, then there's no way that you can
burn them out by turning the pot all the way up -- in either case, the net
resistance in series with the LEDs is zero.

If there's a dropping resistor between the battery and the LEDs, the same is
true, if you leave the resistor in place.

.



Relevant Pages

  • Re: Cant get enough current for 1W Luexon LED even without resistor
    ... resistor but still only about 100ma current. ... Seems like my battery has too much internal ... want to be thinking in terms of voltage. ... The level of these that some high power LEDs can ...
    (sci.electronics.repair)
  • Re: 555 Problem - New
    ... I would check your battery voltage to make sure it's not dead or below ... Also you are wasting power using a 1 K resistor for R1. ... This means when the 555 output moves high to 7 volts, ... That way the two LEDs cannot light with only 2 volts applied. ...
    (sci.electronics.basics)
  • Re: Running LED off 9.3 Volts AC
    ... If you connect the LEDs in series, like this,: ... want in the LEDs, the total voltage they will drop, and the battery ... To be safe, we'll use the minimum Vf of 2.0 volts each and, since ... The power the resistor must dissipate will be: ...
    (sci.electronics.basics)
  • Re: Cant get enough current for 1W Luexon LED even without resistor
    ... resistor but still only about 100ma current. ... want to be thinking in terms of voltage. ... life from any high power LED, is to pulse drive it. ... The level of these that some high power LEDs can ...
    (sci.electronics.repair)
  • Re: Cant get enough current for 1W Luexon LED even without resistor
    ... Then I tried without the resistor but ... the LED I have to raise the voltage to about 11V and of course I ... LEDs for a long time, and never suffered a problem with a switch-on ... max forward current quoted in specs, is for a short duration pulse. ...
    (sci.electronics.repair)