Quantity   Component name
1 × Arduino Nano I have one knocking about from ages ago
1 × MicroSD module and card
1 × Photodiode (or LDR?)
1 × Optek OPB704 Optical proximity sensor photodiode and LED in one package
2 × DS18B20 one-wire temperature sensor ...or as many as you want.
1 × DS1307 RTC module SPI-based real-time clock
1 × LIR2032 3.7V lithium-ion coin cell