FreeTrack Forum - Tried to create a 3point tracker - total novice

Home

Welcome, you're not connected. ( Log in - Register )

FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > Tried to create a 3point tracker - total novice

RSS > Tried to create a 3point tracker - total novice

samuruj	#1 02/03/2012 - 22h31 Top
Class : Apprenti Posts : 5 Registered on : 02/03/2012 Off line	Hi, I'm a total electronics novice. I used the LED assembly wizard which suggested following: I had only a 20 and 30 Ohm resistor so I serialized them to get close to the suggested 56 Ohms. I double-checked that the IR LEDs short legs go on PLUS, also made sure that the next IR LEDs short leg gos on the previousl LEDs long leg. My construction looks like: How I tested circuits: I use my webcam to make IR light visible. Holding a remote control against the webcam makes the light visible. To check if the connections really work I shortcutted them with a resistor and that heated up so I gues juice is flowing also.
dewey1	#2 02/03/2012 - 22h59 Top
Class : Habitué Posts : 191 Registered on : 25/06/2010 Off line	What LEDs are you using? Part number? A picture of the 3 LED wiring would be helpful.
samuruj	#3 02/03/2012 - 23h05 Top
Class : Apprenti Posts : 5 Registered on : 02/03/2012 Off line	HI, Im using http://www.radioshack.com/product/index.jsp?productId=3060980 The pics are too big. You need to scroll to the right to see the rest of the wiring
samuruj	#4 02/03/2012 - 23h06 Top
Class : Apprenti Posts : 5 Registered on : 02/03/2012 Off line	Or here is the direct link to the pic: http://i42.tinypic.com/sepv8p.jpg
dewey1	#5 02/03/2012 - 23h48 Top
Class : Habitué Posts : 191 Registered on : 25/06/2010 Off line	Well first of all, never go by lead length! This is a major fallacy to use as a reference because it can be different from each brand of LED. Use the flat on the LED as the Cathode for a reference to the negative lead. Your LEDs are wired backwards. The foward voltage on a white LED is about 3.3 volts. The maximum current on that LED is about 20 mA not 100mA. Radio Shack specs: This 5mm high-brightness white LED is ideal for hobbies and electronics projects. Ideal for hobbies and electronics projects High visibility, 5mm Round T-1 3/4 Intensity 7000mcd (typical);viewing angle 30° FW current 25mA; FW supply 3.3 (typical), 3.6V (maximum) I highly recommend using the SH485P IR LED as most members use.
samuruj	#6 03/03/2012 - 00h04 Top
Class : Apprenti Posts : 5 Registered on : 02/03/2012 Off line	Im really sorry I posted the wrong IR LED Part: http://www.radioshack.com/product/index.jsp?productId=2062565 I changed the wiring so that the long leg now is on the plus.
samuruj	#7 03/03/2012 - 05h00 Top
Class : Apprenti Posts : 5 Registered on : 02/03/2012 Off line	UPDATE: I found out that 2 of the 3 LEDs are defect. Is there anything wrong with my resistor setup? Could I have fried them?

FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > Tried to create a 3point tracker - total novice

> Stats

1 user(s) connected during the last 10 minutes (0 member(s) and 1 guest(s)).