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A method for resolving this
sandandstars edited this page Dec 30, 2020
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If you are using a 74HCT125 or 245 IC to convert the output from 3V3 to 5V then there's a great way to resolve this. Connect the IC ENABLE pins to a pin on the microcontroller that is HIGH AT BOOT (e.g. D0 on the ESP8266). This will disconnect the neos for you until your program runs (then set it LOW and off you go).