Hi, I'm new to the forums.
I'm trying to wire up some LEDs for a circuit, using a 9V supply, really basic stuff, however I've bought **broken link removed** and did this calculation:
6V/0.02A = 300ohms, so I've used 360ohms, as it was all I've got at the moment so in testing the circuit used these, however I noticed they were getting burning hot!, in a very short time. So I measured the voltage across the resistor and the current through, and using P = IV: P = 0.0185A X 6.82V = 0.126W.
Using 0.25W resistors so I don't see why they are getting hot? Any ideas? I bought some white LEDs from the same seller and they work as expected, no hot resistors there.
I'm trying to wire up some LEDs for a circuit, using a 9V supply, really basic stuff, however I've bought **broken link removed** and did this calculation:
6V/0.02A = 300ohms, so I've used 360ohms, as it was all I've got at the moment so in testing the circuit used these, however I noticed they were getting burning hot!, in a very short time. So I measured the voltage across the resistor and the current through, and using P = IV: P = 0.0185A X 6.82V = 0.126W.
Using 0.25W resistors so I don't see why they are getting hot? Any ideas? I bought some white LEDs from the same seller and they work as expected, no hot resistors there.