I have two open-collector outputs, one from a PS2 keyboard and one from a DS3231 Real Time Clock. I am, successfully, throwing an arduino ATMEGA1884p into sleep mode with a set_sleep_mode(SLEEP_MODE_PWR_DOWN); However, I would like to raise it out of sleep mode by, either, pressing on the Ps-2 key…

Connecting two open-collector INT outputs to one Interrupt

anon57585045 November 9, 2017, 11:04pm 5

Investigate reply #1 carefully. You don't need any hardware beyond a pullup resistor for this.

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