current per pin with external power
GJ
Posts: 19
Hello
I am powering the stamp with an external 12v on VIN.· I need the stamp to run some LEDs and pick up some relays.· I am using some low current relays that operate at 30mA plus whatever the led requires.· I have three relays with LEDs operating from 3 cpu pins, plus some logic circuits that I am connecting to.
Will there be a problem?· It seems that I can drive 30mA per pin and my total is 90mA plus some logic and a fe LEDs.· Will this be an issue?
Thanks
·
I am powering the stamp with an external 12v on VIN.· I need the stamp to run some LEDs and pick up some relays.· I am using some low current relays that operate at 30mA plus whatever the led requires.· I have three relays with LEDs operating from 3 cpu pins, plus some logic circuits that I am connecting to.
Will there be a problem?· It seems that I can drive 30mA per pin and my total is 90mA plus some logic and a fe LEDs.· Will this be an issue?
Thanks
·
Comments
what currrent they draw. I would use a transistor
or a ULN2003/ULN2803 to drive relays.
regards peter