Quantity   Component name
2 × LEDs Electronic Components / Misc. Electronic Components
1 × 10k resistior
1 × transistor
1 × piezo element
1 × 7 segment LED display
1 × switch Development Kits, Boards and Systems / Development Kits and Boards
1 × 6 volts supply
1 × 5.1k
1 × AMP I.C
1 × 8 ohms speaker
1 × variable resistor
1 × diode
1 × 10uf capacitor
1 × 470uf capacitor
1 × 10mA meter