Author Topic: IR Led Specifiaction  (Read 13317 times)

Offline Spurtus

  • *
  • Posts: 8
  • Karma: +0/-0
    • View Profile
on: January 14, 2008, 02:12:40 AM
firstly well done Johnny Lee!.. great stuff, have you had any job offers from Ninentdo yet? I'm a game developer and I'm on a mission to get his working on my laptop as a first port of call.

However, the glasses require a few questions...

what type of IR Leds should I purchase?
what voltage to power them with? Resistor or potentiometer?
is it worth doing the leds at either side of the glasses in clusters?

Further, where might I get something like this in the UK? The electronics superstore in the UK is www.maplin.co.uk but seems to have only one type of 950nm IR Led.

Perhaps there is a specification docs on the standard sensor bar that give clues?

Best regards,
Spurtus.



Offline troy59

  • *
  • Posts: 123
  • Karma: +2/-0
    • View Profile
Reply #1 on: January 16, 2008, 10:09:57 AM
same thing with me, i just bought 100 150 ma IR leds from a digi key catalog, but i was wondering if i needed and resistors, or how much voltage i needed. If you could tell me, that would be great



Offline atomriot

  • *
  • Posts: 177
  • Karma: +16/-0
    • View Profile
Reply #2 on: January 16, 2008, 10:36:55 AM
ledcalc.com is a good place to check that

it depends on how many leds are in your pen, and what their forward voltage is.

i have a 1.2v LED that i have inline with just 1 battery. its max forward voltage is 1.8 so its able to run just fine.

Details, details. Things to do. Things to get done. Don't bother me with details, just tell me when they're done.
--
James Lionel Price



Offline troy59

  • *
  • Posts: 123
  • Karma: +2/-0
    • View Profile
Reply #3 on: January 16, 2008, 10:37:55 AM
it is 1.5v for one and the max is 3v i believe



Offline troy59

  • *
  • Posts: 123
  • Karma: +2/-0
    • View Profile
Reply #4 on: January 16, 2008, 10:45:07 AM
hey, thx for the site



Offline holyone2

  • *
  • Posts: 3
  • Karma: +0/-0
    • View Profile
Reply #5 on: January 27, 2008, 08:13:56 AM
I am also in the UK and also unsure as what is the best IR speced LED to purchase from experienced user's experience?

Thank you!



Offline Demonic69

  • *
  • Posts: 8
  • Karma: +2/-0
    • View Profile
Reply #6 on: January 27, 2008, 07:02:50 PM
In the UK Maplins or Farnells (online) are best.
I bought 2x YH70M from Maplins and run them parallel with one AAA battery, no resistor and they work just fine.