LED

Fd

Consider a 390 Ohm resistor.

For 9V ,185ohm resistor

6v and 9v can easily be mis-read upside down on EC just as they can anywhere..... For a 6v supply a 185 ohm resistor would be reasonable here....For a 9v supply a 390 ohm resistor would be reasonable here. The schematic here shows a 6v supply, so the mentioned 185 ohm resistor is the most appropriate choice (albeit giving slightly higher than the more idealistic 20mA max current as per setting specs). The 98.4 ohm shown resistor in the schematic gives a current of 39.9mA which is too high a current and is likely to blow the LED.....see the LED settings here for desired specs, and note that an LED does not have a fixed resistance like a standard filament lamp...EC does not have such a lamp to compare with....but basically for an LED, we need to deduct its fixed voltage (similar to a diode action in a npn bjt between base and emitter ....but v as per settings here) from the source voltage and work on that result for the series resistor.....eg 6v -2v = 4v ... then to obtain our 20mA (as again per settings)...we would need 4/0.02 = 200 ohm resistor ideally....R=V/I

Extra note: The EC LED is programmed to 'blow' at twice the current shown in the settings....so this LED would blow at 40mA or more. It is probably not a good idea to push a real LED beyond its stated current/voltage limits.