sen0539 voice recognition power up current draw
Joey.King 2025-02-19 05:23:16 593 Views1 Replies I have the sen0539 and a stepper motor driver powered by a 1.5A buck converter. It all works fine, nothing gets hot. However, the measured voltage sags so much during startup that the stepper motor driver doesn't initialize properly. If the sen0539 is disconnected during startup, there are no problems. I don't have a modern oscilloscope, if someone reading this does, I'd really like to see the startup current draw of the sen0539. I have a 3A buck converter I'll try.
fyi: The 3A converter works fine as expected. BTW: I also figured out that for my project current draw at startup is highest. I could therefore use the 1.5A converter without issue if I just restart the ESP32 when it is powering up cold. Like so:
int reason = esp_reset_reason();
sp2("Reset reason = ", reason);
if ( reason != RESET_REASON_CORE_SW ) {
vTaskDelay(1000 / portTICK_PERIOD_MS);
ESP.restart();
}
That insures the stepper motor driver isn't getting initialized during the “brownout” period during startup.
Joey.King 