This is a chromatic instrument tuner I made for myself because I'm a band nerd and I need a better tuner so instead of buying one, I thought it would be better to make one :). (This is my first custom project so hope it works🙏).

• Powered by a Xiao nRF52840
• Built in microphone and a jack so you can choose to use a external mic instead
• 2.42" OLED
• 3 LEDs to indicate if you're flat, sharp, or in tune
• 2 buttons to adjust hertz
• 500 mAh battery