[jrk21v3] Connecting an external LED to the ERR output


I would like to connect an external LED to the ERR output of a jrk21v3. The is not much information in the user guide. Waht current could be driven out of that pin ? Should I place a resistor in serie with the LED or can the LED be connected directly between the ERR output and GND ?


Hello. The jrk’s ERR line has a 220 Ohm resistor on it, so that will limit the amount of current it can provide. It should be safe to attach an LED directly from the ERR line to GND or to put a resistor in series with the LED if you want it to be dimmer.