« previous next »
Pages: 1

Author Topic: My Simple Pen  (Read 5206 times)

Offline Xin

  • *
  • Posts: 3
  • Karma: +0/-0
    • View Profile
on: April 19, 2008, 10:25:09 AM
Hello,

This is my basic pen. It's very usefull.
Material: a battery AAA, 2 rigid wire, a IR led,





Offline UndCon

  • Support Admin
  • *
  • Posts: 566
  • Karma: +11/-3
    • View Profile
    • UndCon
Reply #1 on: April 19, 2008, 10:33:49 AM
As long as you are saticfied ;)

not nice - but gets the job done..

EDIT : spelling
« Last Edit: April 23, 2008, 04:50:36 PM by UndCon »


Offline rod

  • *
  • Posts: 1
  • Karma: +0/-0
    • View Profile
Reply #2 on: April 23, 2008, 03:56:01 PM
Interesting, I'm planning to do mine just as simple as yours is.
I have a question though. Doesn't it need a resistor?


Offline UndCon

  • Support Admin
  • *
  • Posts: 566
  • Karma: +11/-3
    • View Profile
    • UndCon
Reply #3 on: April 23, 2008, 04:52:04 PM
If you are using a 1.5volt battery you need a resistor

If you are using a 1.2volt rechargable you dont need it
(if the IR-LED is 1.2 volt of course)


Offline Xin

  • *
  • Posts: 3
  • Karma: +0/-0
    • View Profile
Reply #4 on: April 24, 2008, 03:08:15 AM
I don't use resistor, but I don't know if I need it. Because I finded the IR led in a old box in a cabinet. But the led no had burn, and I turn on for more than 1 minute.




Offline UndCon

  • Support Admin
  • *
  • Posts: 566
  • Karma: +11/-3
    • View Profile
    • UndCon
Reply #5 on: April 24, 2008, 11:37:16 AM
here is my tip

http://ledcalculator.net

Many IRleds are 1.2volts, yours might be as well...

But hey - you didnt pay anything so you have nothing to loose - if it burns...then you get a new IRled (that you know the specs on)

//UndCon


Pages: 1
« previous next »