Model Boat Mayhem

Technical, Techniques, Hints, and Tips => The "Black Arts!" ( Electrics & Electronics ) => Topic started by: ray123 on November 09, 2016, 10:47:09 pm

Title: led help
Post by: ray123 on November 09, 2016, 10:47:09 pm

hi all   im fairly new to useing leds  'normaly use grain of wheat bulbs '    ive brought a load of leds & different resistors  from the component shop in the summer  to put lights on my boat this winter


 heres a question   
i  have  a 6volt  jell battery to power the leds.. but is droped to 5.5v through a action switcher'   the voltage for the leds is from 2volt to 3.3 volt 'in the component book' 


  is it a case of  trying a resistor  untill you are happy with the brightness of the led?


ive been useing resistors between 150  180 200 220  270

what i have been useing is a 200 resistor on a 3.3volt led  on 6volt!   could someone advice me if this is ok for the leds  im useing as the leds are glued in the model i dont want to replace them in a hurry  thanks for any help!

Title: Re: led help
Post by: Colin Bishop on November 09, 2016, 11:17:34 pm

Most boats I have seen with LEDs have the lights far too bright (including some of mine!). On full size vessels the navigation lights are actually quite dim, only deck floodlighting is actually bright.

I usually run both LEDs and GoW bulbs on around half the nominal voltage which tends to look better and makes them last longer.

Colin

Title: Re: led help
Post by: Stan on November 09, 2016, 11:31:27 pm

Hi ray p/ m sent to you


Stan

Title: Re: led help
Post by: Klunk on November 10, 2016, 06:40:12 am

http://www.lutonmodelboat.co.uk/frame_hints.html
Look here.....all the basics about LED

Title: Re: led help
Post by: The Old Fart on November 10, 2016, 06:04:43 pm

Have a look at this site for calculations.

www.ledcalc.com

Title: Re: led help
Post by: ray123 on November 10, 2016, 10:04:55 pm

thanks for the input & help everyone   i  have spoke to  stan  :-))  regarding the leds  & its all clear now  thanks regards ray