Quantity   Component name
1 × Printed circuit board from the Fritzing file provided
1 × Maxim MAX4468 Microphone Preamplifier IC; substitute the (pin-compatible) MAX4467 if desired
3 × 10kΩ resistor
2 × 2kΩ resistor
4 × 1µF ceramic capacitor
1 × 100nF ceramic capacitor
1 × 3-pin male header Preferably short, dlepending on your shunt; directs the Shutdown circuit
1 × Jumper shunt Goes on the 3-pin header (the Ground side by default)
2 × 2-pin wire-to-board terminal One for the mike, one for the speakers. I personally favor TE Connectivity's 1-2834019-2 for its low profile (6.5mm) and ease of use.
1 × ON Semiconductor NCS2211D Audio Power Amplifier IC
1 × NXP Semiconductor PCF8591T/2,518
1 × 10nF ceramic capacitor
1 × 0.1 nF ceramic capacitor
1 × 1µF tantalum capacitor
1 × 1MΩ resistor
2 × 100kΩ resistor
2 × 20kΩ resistor