Quantity   Component name
1 × 9V Battery The powersupply
8 × 10Kohm Potentiometer (linear) Potentiometers for the 8 different notes/frequencies
9 × Switch Simple on/off switch
9 × 10Kohm Resistor The resistor for one of the 555-timers
1 × Electrolytic Capacitor (100µF) The capacitor for one of the 555-timers
1 × Ceramic Capacitor (33µF) The capacitor for the sound producing 555-timer
16 × NPN Transistor To amplify the signal for the LED's and the sound producing oscillator
1 × Diode The dioode for the Decade Counter
1 × 1Kohm resistor Resistor
1 × Batteryclip To connect to the battery.
2 × NE555-timer An ic chip that we will use to measure the time it takes for the capacitor to discharge.
1 × 4017 Decade Counter An ic chip that will select the notes in order.
1 × 3.5mm stereo jack The output. Where we connect the synth to our speakers
8 × LED Light Emitting Diode
1 × 200Kohm Potentiometer (linear) The potentiometre to control the tempo
1 × 3.3Kohm Resistor The resistor for one of our 555-timers