Quantity   Component name
2 × PIC’s 18F2550 microcontroller
2 × 20 MHz crystal
4 × 0.1uF capacitor
4 × 22pF capacitor
2 × 50k ohm resistor
2 × 10k ohm resistor
4 × 1k ohm resistor
2 × 3,9k ohm resistor
2 × 46k ohm resistor
10 × 5k ohm resistor
4 × 160 ohm resistor
2 × 27 ohm resistor
2 × DAC0800
2 × 24 ohm resistor
4 × 4.7k ohm resistor
2 × 700 ohm resistor
2 × 85k ohm potentiometer
2 × 26k ohm potentiometer
2 × phone headsets (with microphones)
50 × wires
1 × 9V, -9V, 5V DC sources
8 × LM741 Amplifier and Linear ICs / Operational Amplifiers
4 × Diodes
4 × 10uF capacitor
2 × 10nF capacitor