I use the following web site always to work out the array and resistors for LED circuits.
http://ledcalculator.net/
My 3 watt LEDs have the following specifications
Led Voltage Drop 3.6 Volts
LED current 700mA
Number of LEDs 12.
Results from WEBSITE
I have used 10 Watt LEDs.
When I first turn on the circuit all the LEDs Light they get hot around 40°c. Then one array dims and the other starts to flash and goes off completely.
Any advice will be greatly appreciated to resolve tis challenge.
Thank you
Rodney
http://ledcalculator.net/
My 3 watt LEDs have the following specifications
Led Voltage Drop 3.6 Volts
LED current 700mA
Number of LEDs 12.
Results from WEBSITE
- You will need 4 x 1.8 ohm 1 watt resistors.
- The 1.8 ohm resistor is colour coded: Brown, Gray, Gold, Gold.
- Each 1.8 ohm resistor consumes 882 milliwatt.
- Total power consumed by the resistors is 3528 milliwatt.
- Total power consumed by the LEDs is 30240 milliwatt.
- Total power consumed by the circuit is 33768 milliwatt.
- Total current drawn by the circuit is 2800 milliampere.
- The resistor values are calculated based on the common ±5% tolerance resistors.
- Make sure to wire the LEDs in the correct direction as shown below.
- Always leave some space for the resistors to breathe. They might get hot.
When I first turn on the circuit all the LEDs Light they get hot around 40°c. Then one array dims and the other starts to flash and goes off completely.
Any advice will be greatly appreciated to resolve tis challenge.
Thank you
Rodney