Model Boat Mayhem

Technical, Techniques, Hints, and Tips => The "Black Arts!" ( Electrics & Electronics ) => Topic started by: regiment on December 20, 2010, 01:21:37 pm

Title: leds
Post by: regiment on December 20, 2010, 01:21:37 pm

have received my 10 mm  ulter bright blue leds shouli i have ordered the transtors /?? for them  as well  thanks

Title: Re: leds
Post by: john s 2 on December 20, 2010, 01:30:44 pm

Depending on what voltage you intend to run your led,s on.You may need a resistor.There was a Forum post on calculating
resistor value required. John

Title: Re: leds
Post by: regiment on December 20, 2010, 02:26:45 pm

hello john s i have 4 leds to use will try and find foram for them  thanks

Title: Re: leds
Post by: john s 2 on December 20, 2010, 02:40:12 pm

The post which should help you . Is under miscellaneous, electrical & electronics. By Crafty Sod dated June 22nd 2010.Hope it
helps. I myself much prefer leds to gow,s. Nothing is more annoying than to suffer a bulb failure.Often resulting in much
difficulty to change once built in. John.   

Title: Re: leds
Post by: regiment on December 20, 2010, 02:54:13 pm

thanks john s have just found foram by crafty  //???@@~~ not much use to  send off for them now (transistors) christmas rush will have to wait untill holidays are over so no boat building back to the washing up etc  thanks again

Title: Re: leds
Post by: malcolmfrary on December 20, 2010, 04:18:43 pm

Are they transistors or resistors?  One is a three legged device that switches current on and off, the other is a two legged device that limits current.  Asking for the right item saves a lot of grief later on.

Title: Re: leds
Post by: boatmadman on December 20, 2010, 04:37:07 pm

This will do the sums for your LED installation:

http://led.linear1.org/led.wiz

Ian