Reduce MCU frequency on ESP32 to 20Hz
Budget: $10 – $30 USD
Aim:
Battery powered audio recorder (Digital microphone INMP441 on I2S bus) using the ESP32.
I use this open source code and it works already pretty good:
https://github.com/atomic14/esp32_sdcard_audio
With it's full 240Mhz it uses way too much power. But i am not clever enough to modify the code to let the ESP32 run with only 20Hz (which hopefully should be fast enough for audio recording?).
Battery powered audio recorder (Digital microphone INMP441 on I2S bus) using the ESP32.
I use this open source code and it works already pretty good:
https://github.com/atomic14/esp32_sdcard_audio
With it's full 240Mhz it uses way too much power. But i am not clever enough to modify the code to let the ESP32 run with only 20Hz (which hopefully should be fast enough for audio recording?).