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Reply To: Need positive logic from the 74HC595 output

OpenSprinkler › Forums › OpenSprinkler Unified Firmware › Need positive logic from the 74HC595 output › Reply To: Need positive logic from the 74HC595 output

July 6, 2015 at 5:14 pm #39089

mikek
Participant

@David,

I thought about using inverters but decided not to because you could have an instance with startup leaving all channels on if open sprinkler fails to run or the pi fails to boot. Unless your inverter uses an output enable, you could tie that to the OE of the 74hc595.

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