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Sound Detector - inverting Gate output issues

 by maxt ¦  Fri Aug 10, 2018 9:38 am ¦  Forum: SparkFun Product Questions ¦  Topic: Sound Detector - inverting Gate output issues ¦  Replies: 0 ¦  Views: 282

Hi– I'm using the SparkFun Sound Detector's Gate output to wake up an ESP8266 board (Adafruit Feather). The Gate pin goes high when sound is detected, while the ESP needs its Reset pin pulled low to wake it up. I'm inverting this with a resistor-biased NPN transistor ( this one ) hooked up like so: ...