You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
25 lines
1.6 KiB
Markdown
25 lines
1.6 KiB
Markdown
5 months ago
|
# NoiseCard
|
||
|
|
|
||
|
|
NoiseCard is an attempt to build a dead easy tool for monitoring ambient noise levels. The ultra-low-power microcontroller takes periodic decibel measurements while powered on, using blinking LEDs for indication. The circuit requires only a few milliwatts to run, enabling it to run off of direct solar power without a battery (though some large capacitors provide a small reserve).
|
||
|
|
|
||
|
|
Ambient noise levels in populated areas, especially North America, can often exceed what is considered safe for our ears, with prolonged exposure leading to lasting impacts on our health. Through a tool like the NoiseCard, people can become more aware of the noisy environments they're living in (and potentially take action to reduce excess noise exposure).
|
||
|
|
|
||
|
|
## Building the source
|
||
|
|
|
||
|
|
You need:
|
||
|
|
|
||
|
|
* [ChibiOS sources](https://www.chibios.org/dokuwiki/doku.php)
|
||
|
|
* The arm-none-eabi GCC toolchain (through your distro or from [ARM developer](https://developer.arm.com/downloads/-/gnu-rm))
|
||
|
|
* [GNU Make](https://www.gnu.org/software/make/)
|
||
|
|
* [OpenOCD](https://openocd.org/) or another tool to program the microcontroller
|
||
|
|
* [KiCAD](https://www.kicad.org/) if you wish to work with the hardware files
|
||
|
|
|
||
|
|
Extract ChibiOS to a folder, edit the `Makefile` so CHIBIOS points to that folder, then run `make`.
|
||
|
|
|
||
|
|
## Credits
|
||
|
|
|
||
|
|
* [ESP32-I2S-SLM](https://hackaday.io/project/166867-esp32-i2s-slm) for a starting point with accurate decibel-measuring code.
|
||
|
|
* [Qfplib](https://www.quinapalus.com/qfplib.html) for providing optimized floating-point code for the Cortex-M0+ microcontroller.
|
||
|
|
* ChibiOS for providing an awesome RTOS and HAL that made firmware porting and device configuration a breeze.
|
||
|
|
|