I'm trying to use damaged emergency power supply (Battery and few resistors are gone). I do not have data for 30 LEDs (unknown). I do have 6V battery (4.5Ah Sealed Lead Acid Battery). Could some body advice me how to operate these LEDs with this battery. How to calculate resistor values for unknown LED parameters? I tried using 1K resistor, but LEDs are glowing and after few seconds one of the LED got damage due to over current. And PCB is getting to much heat after supplying 6V.
Thanks in advance.
Regards,
Arul
Thanks in advance.
Regards,
Arul