LED On Indicator?

[paulham]

hi
i am building my dvd laser project, and its all going well so far.
i have just bought a project box for it to fit into, but i was wondering how i could wire up a LED indicator next to my button, just to let me know the laser unit is on?
i could eaisally wire it up but will it take alot of power away from my ddl driver?
help would be greatly appreciated!
thanks

 

[Deleted member 8178]

The laser itself is a good inicator ;D. LED + resistor after the switch, back to GND on the input should work I think.

 

[Deleted member 8178]

O, how many volts are you using?

 

[paulham]

will be using 7.2v, 6nimh?

 

[Deleted member 8178]

Then use a 330 ohm resistor in series with the LED and it will take 16ma which is good.

 

[paulham]

would i then have to re adjust my pot on my driver?

 

[Deleted member 8178]

If you use the input, then no

 

[MarioMaster]

yes make sure you hook the led and resistor up before the driver - not after

 

[toked323]

i run my LED's off 300ma no problem

 

[Deleted member 8178]

That's one hell of a indicator

 

[Maxpowa]

Same here, until I started using 1W Luxeons I never saw what whas going on around here. Will use a 3mm indication led on my laser box though, so as not to take away to much power from the batteries.