I had 2 red LEDs connected in series to a power supply that was current limited to 300mA. Each LED is rated at 700mA and about 2.9V forward voltage. The LEDs were pulsed at about 1% duty cycle, so they were staying cool. I turned up the voltage on the power supply to see how they would work connected to a battery that provides 24V.
Once I got to 24V, the LEDs stopped working. It appears the the LED closest to the + rail burned out. The other LED is fine.
What happened here? I thought LEDs were current devices.
Once I got to 24V, the LEDs stopped working. It appears the the LED closest to the + rail burned out. The other LED is fine.
What happened here? I thought LEDs were current devices.