This is the cheap and easy to made emergency flash light almost parts are taken from old electric toy car and and the engine is removed from a non electric toy based on spring retain force let's make it
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Step 1: Parts Kart
1 super capacitor 3 to 5.5v
3 resistor 5to 10ohm
4 DC motor 6v
5 toy car gear which has spring and thread pulling drive system
6 pen refile
7 sharp blade
cut refill small piece enough to couple the excel to motor
Step 3: Couple the Motor With Excel
slightly hot the refill cut and insert it to excel shaft and on other side to excelmotor shaft
Step 4: Do Connection As Given in Circuit
Step 5: This Is How Circuit Looks
after soldering contacts as given in circuit diagram its almost ready to go
Step 6: Time to Light Up
pull the thread of gear so first the spring going to store energy in compression of spring then left the thread it will lose energy to rotate the gear links which rotates the shaft that is connected to motor as a result capacitor charges and then by connecting led it will glow led .