Intro

Yes! Now you can have a sneaky Metronome!

• First, why did i make this?

Super specific, but when I “Practice” lirics/write them in my head

I’ve noteced when I start singing to the mic,

I was super off with timing and lirics dont match,

maybe theres a different “fix” but this is my fix.

Links

Firmware

3D Print

Required Components

• ESP32-C3 0.42-Inch OLED: AliExpress Link
• TRRS Jack: AliExpress Link
• Coin Motor: AliExpress Link
• NPN Transistor (Like 2N2222): Aliexpress Link
• sum battery (up to 20x20x4.6)

Note: These are referral links. If you purchase through it, I earn a commission at no extra cost to you.

Connections

the TRRS has 3 pins, and on the other side 1 pin, connect the center pin on the side with 3 pins to gnd, and the pin on the left of it (assuming the side with 1 pin is facing down) to GPIO4 on the esp32-c3

you connect Base of the transistor to GPIO5. Collector to the black wire of the motor. red wire of motor to 3v. emitter to gnd.