FreeTrack Forum

Just like the title says, I have made a 3 point cap and one of the LEDs more dim then the other two. I'm quite baffled by this. Even disconnecting both of the LEDs and trying to run just that one LED has the same results even when I use another LED. If someone could help me with this that'd be great. Thanks!

If your LEDs were in parallel and you have tried to replace dimmer one with no change, then problem is resistance.

Resistor of 30 Ohm with low tolerance (20% - no 4th band) in 3V parallel setup could mean 10mA change (20%). But, it shouldn't be so dimmer.
Other thing could be bad wiring and soldering which could add to resistance.
So, disconnect battery and measure resistance from battery connector to LED, then on resistor. Other wires and resistors should be reference points.
With battery in place you could measure voltage drop on LED, then on resistor.

BTW. if you don't have multimeter to do measurements, you could check soldering points for some higher temperature. This could mean bad soldering and higher resistance.

Good luck

Depending also on the type of LED you used and their SPREAD of IR, you may have one of the LED's not quite as straight as the rest.

I had this problem with my 1st 3 point build as I lined the LED's up by EYE !

Next build required a little more thought to ensure ALL LED's were pointing the EXACT same ANGLE and DIRECTION !

Again, may only apply to Led's that have a lesser viewing angle .... rather than the ones recommended here on these forums.


GL