PART QTY DIGIKEY REFERENCE PRICE in $$ 1. Tactile switch 2 401-1779-1-ND 0.50 x2 2. Tactile switch 1 EG4373-ND 1.37 3. Capacitor 100nF 7 C1005X7R1A104K 0.24 (buy 10) 4. Capacitor 2.2uF 2 ECJ-GVB1C225K 0.40 x2 5. Connector header 1 S9005E-06-ND 0.91 6. Resistor 10K 4 P10.0KLCT-ND 0.06 x4 7. Resistor 5.1K 1 P5.10KLCT-ND 0.06 8. Resistor 15K 1 P15.0KLCT-ND 0.06 9. Diode BAT54C 1 BAT54CTPMSCT-ND 0.55 10. MCP9802 temp sensor 1 MCP9802A5T-M 1.49 11. DS1339C-3.3 RTC 1 DS1339C-33#-ND 6.77 12. ATTINY84 1 ATTINY84-20SSU-ND 2.90 13. LP2985-4.5 1 LP2985IM5-4.5CT-ND 1.01 14. DS1836B 1 DS1836BS-5+-ND 6.43 15. TPS61222 1 296-24172-1-ND 2.63 16. Inductor 4.7uH 1 LQH3NPN4R7NG0L 0.52 17. MOSFET IRLML2502 1 IRLML2502PBFCT-ND 0.51 18. Buzzer ST03-CH 1 433-1007-1-ND 3.43 19. LCD display 1 NHD-0208BZ-FSW-GBW-3V3-ND 10.10 20. Battery holder 20mm 1 BU2032SM-HD-GCT-ND 0.71 21. Battery CR2032 1 N189-ND 0.40 22. Battery holder 2AA 1 SBH-321AS-ND 0.89 23. Power jack 1 CP-014CHPJCT-ND 0.90 24. Power plug 1 CP3-1003-ND 0.93 25. 14-pin header 1 WM8125-ND 1.50 26. 14-pin header 1 S7110-ND 1.12 27. Wall adapter 1 DCH2-050EU-0001-ND 4.59