Hi. I`m not that new to electronics but I`m having some problems figuring this out.
The basic idea is that i want to power six 10 W led-s. They have a Vf of 9-12V and
a current draw of 1050 mA (china). I also want to buy a 12 V power supply 16.5 amps
or something like that. In the past i have used 12 V led-s and connected them directly to the
power supply and they worked fine. Is is true that the current draw from the source was getting
higher and higher as the led-s temperature climbed. This time around i want to limit the current that
the led-s take in. For that i want to use the LM317. Now, with the 317 i want to use a 2W 1.5 ohm resistor.
I want to limit the current draw to about 800 mA. I don`t know for sure that the 12 volts from the power supply
will be enough to power the led-s. So could anyone give me some advice on this matter.
Tanks a lot!
The basic idea is that i want to power six 10 W led-s. They have a Vf of 9-12V and
a current draw of 1050 mA (china). I also want to buy a 12 V power supply 16.5 amps
or something like that. In the past i have used 12 V led-s and connected them directly to the
power supply and they worked fine. Is is true that the current draw from the source was getting
higher and higher as the led-s temperature climbed. This time around i want to limit the current that
the led-s take in. For that i want to use the LM317. Now, with the 317 i want to use a 2W 1.5 ohm resistor.
I want to limit the current draw to about 800 mA. I don`t know for sure that the 12 volts from the power supply
will be enough to power the led-s. So could anyone give me some advice on this matter.
Tanks a lot!