Pages: [1]   Go Down
Author Topic: Need help designing circuit to amplify IR LED  (Read 1032 times)
0 Members and 1 Guest are viewing this topic.
Utah
Offline Offline
Newbie
*
Karma: 0
Posts: 1
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I'm currently working on a laser tag system using the Uno and I'm having trouble getting enough current to my IR LED.  The Uno obviously can't provide enough current so after a search on google I thought I might try an amplifying transistor. I tried the 2N2222 and 2N5550 (don't ask why I picked this one) but they did not work. I have no idea if these are the right ones for what I am trying to accomplish so I'm hoping I might get some help in picking the right transistor and perhaps drawing up a schematic of the IR LED circuit, but I would prefer to use one of those transistors I mentioned above as I immediately have those on hand. I would appreciate any help in this matter.

More information/Future edits:
IR LED: TSAL 6100 http://www.mouser.com/catalog/specsheets/tsal6100.pdf
In addition to the IR LED I will have a TLCY 5800 LED: http://www.vishay.com/docs/83178/tlcr5800.pdf wired in parallel acting as a muzzle flash.
I am using a 7.2-7.5V power source.
Logged

Montreal
Online Online
Edison Member
*
Karma: 23
Posts: 2486
Per aspera ad astra.
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

 Nice tutorial with examples :
http://www.electronics-tutorials.ws/transistor/tran_4.html
http://www.electronics-tutorials.ws/diode/diode_8.html
Logged

Delray Beach, FL USA
Offline Offline
Full Member
***
Karma: 0
Posts: 113
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

You can see the circuit I use in my IR remote signal blaster at:

http://home.comcast.net/~tomhorsley/hardware/arduino/teensy.html

I got tired of reading spec sheets and trying to understand exactly how to pick the right current limiting resistor, so in the end I found it simpler to breadboard the circuit and just put my trusty multimeter in series with the LEDs to directly measure the current different resistors gave me, then picked a resistor that gave me the max rated current for the IR LEDs I was using.
Logged


Pages: [1]   Go Up
Jump to: