I'm thinking of using these LEDs as indicator lights (https://www.idec.com/language/english/datasheet/AP22_datasheet.pdf). As far as I can see, the specs say nothing about current requirements. I can buy a 24v transformer rated at 20mA, and I found another one rated at 40mA.
I remember reading that unlike incandescent lamps, which have fixed current draws determined by the load resistance and the applied voltage, LEDs respond to the current applied, so an excessive current will harm the LEDs.
The spec sheet shows the circuit built into the device. Does it matter what the current rating of the transformer is, and if so, how do I determine that?
And, since the circuit contains a rectifier, I presume I can run this off of a 24VAC transformer?
I remember reading that unlike incandescent lamps, which have fixed current draws determined by the load resistance and the applied voltage, LEDs respond to the current applied, so an excessive current will harm the LEDs.
The spec sheet shows the circuit built into the device. Does it matter what the current rating of the transformer is, and if so, how do I determine that?
And, since the circuit contains a rectifier, I presume I can run this off of a 24VAC transformer?