Quantity   Component name
1 × Seeed Studio XIAO SAMD21 (Seeeduino XIAO)
1 × TP4056 battery charger module
1 × 18650 or equivalent lithium battery
1 × Voltage regulator (like boost converter MT3608)
1 × LM386 audio power amplifier IC
1 × 47pF capacitor
2 × 100nF capacitor
1 × 1uF capacitor
1 × 2.2uF electrolytic capacitor
1 × 220uF electrolytic capacitor
1 × 1000uF electrolytic capacitor
1 × 10Ω resistor
1 × 470Ω resistor
3 × 1K resistor
1 × 10K resistor
1 × RGB LED
1 × 10K linear potentiometer
1 × 8Ω speaker
1 × Push-button switch
1 × Rocker or latching switch