Quantity   Component name
1 × Wietek Bundeswehr-Taschenlampe I guess there are a lot of versions of this lamp out there. Unfortunately I don't know a lot about them except for the fact that they are very cheap on ebay.
1 × Custom PCB Hit me up if you need one or make your own
1 × ICM7555 DIP package
1 × 1uF film capacitor 5mm pitch
1 × 3W LED
1 × 1N4002 Discrete Semiconductors / Diodes and Rectifiers
4 × M3x18 screws and lots of M3 nuts Or use proper PCB spacers
1 × 100uH inductor 5mm pitch
1 × BC327 TO-92
1 × BC547 TO-92
1 × 1,5k resistor
2 × AA batteries with holder
1 × Some wire
1 × Adhesive velcro tape
1 × 1k resistor
1 × 0,22 resistor