Hello,
I have removed a LED circuit from a LED light battern, cut the board where 4 LEDs were in series. Batten is similar to this: http://www.amazon.in/Eveready-18-Wa...TF8&qid=1492661407&sr=8-9&keywords=led+batten I have connected 4 SMD LEDs to 12 V Lead acid battery(volt meter reads 12.5V). they are very bright and the circuit board is very hot to touch. The voltage across each of them is 3.1 V. I connected a 18ohm resistor. circuit is like this.
battery +ve - resistor 18ohm - LED1 - LED2 - LED3 - LED4 - Battery -ve.
Is this ok or should I put the resistor between the LEDs. Is there any other way, simple way to reduce the hotness of the circuit board apart from heatsink.
I have removed a LED circuit from a LED light battern, cut the board where 4 LEDs were in series. Batten is similar to this: http://www.amazon.in/Eveready-18-Wa...TF8&qid=1492661407&sr=8-9&keywords=led+batten I have connected 4 SMD LEDs to 12 V Lead acid battery(volt meter reads 12.5V). they are very bright and the circuit board is very hot to touch. The voltage across each of them is 3.1 V. I connected a 18ohm resistor. circuit is like this.
battery +ve - resistor 18ohm - LED1 - LED2 - LED3 - LED4 - Battery -ve.
Is this ok or should I put the resistor between the LEDs. Is there any other way, simple way to reduce the hotness of the circuit board apart from heatsink.