Quantity   Component name
1 × CR2032 Battery
1 × BK-913 Battery Holder
1 × OPA2322AIDR Amplifier and Linear ICs / Operational Amplifiers
1 × Microphone SPU0410HR5H-PB Electronic Components / Misc. Electronic Components/MEMS Microphone
1 × Slide Switch SPDT SMD Mini Got a bunch on Ebay
1 × Resistor 0805 0 ohms For trace jumper on wide eye version
5 × Resistor 0805 100k
2 × Resistor 0805 470 ohms
2 × Resistor 0805 1k ohms
1 × Resistor 0805 68k ohms
2 × Capacitor Ceramic 0805 3.3nF
2 × Capacitor Ceramic 0805 3.3pF
1 × Capacitor Ceramic 0805 1uF
1 × Capacitor Ceramic 0805 100nF
2 × LED 0805, Yellow, Red or Orange Any of the lower Vf versiions