Quantity   Component name
1 × Atmel Attiny 45 The heart
1 × 3.5mm headphone jack For external use only
1 × 5 mm LED Status indicator
1 × SPST switch
1 × Momentary Switch
1 × BC550 RF, IF, RFID, ZigBee Semiconductors and ICs / Transistors and FETs
1 × 1μF Electrolitic Capacitor
1 × 5.1 kΩ Resistor
1 × 15kΩ Resistor
1 × 8 Pin Chip holder
1 × CR2032 Battery holder
1 × Wires and connector as needed