Hi All,
I've got a device which uses an open-drain output, this pulls to GND when a fault occurs.
Currently I have a photomos device on the output where the LED switches off when a fault is detected. This all works fine.
I would now like to add an additional LED which illuminates when a fault is detected, therefore when the open drain output pulls to ground.
My brain has turned into mush and I can't quite work out how to achieve this. Attached is the circuit I have so far resistor value is 3k9.
I've got a device which uses an open-drain output, this pulls to GND when a fault occurs.
Currently I have a photomos device on the output where the LED switches off when a fault is detected. This all works fine.
I would now like to add an additional LED which illuminates when a fault is detected, therefore when the open drain output pulls to ground.
My brain has turned into mush and I can't quite work out how to achieve this. Attached is the circuit I have so far resistor value is 3k9.
Attachments
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