CrankGlow Battery Free Hand Crank LED Lamp

CrankGlow is a compact battery-free hand-crank LED lamp designed as a simple and practical 3D printing project. The lamp generates electricity manually by turning the crank, stores the generated energy in a supercapacitor, and uses that stored energy to power the LED after you stop cranking.

The design uses a geared DC motor as a small generator. The generated voltage is rectified and regulated before charging the supercapacitor, which means no conventional battery is required. The LED filament is also designed to be removable and replaceable, so different LED colours can easily be used.

In my current setup, approximately 2 minutes of hand cranking provides around 10 minutes of light, depending on crank speed, LED type, and the electrical components used.

Components used:

JGA25-370 12V 170 RPM geared DC motor

https://s.click.aliexpress.com/e/_c2uvdE3d

https://s.click.aliexpress.com/e/_c4o9yr5l KBP210 bridge rectifier

https://s.click.aliexpress.com/e/_c3QBZROB

https://s.click.aliexpress.com/e/_c3vpoKhv MP1584EN 5V DC-DC step-down module

https://s.click.aliexpress.com/e/_c3OnNVLD

https://s.click.aliexpress.com/e/_c4KvhpKr

https://s.click.aliexpress.com/e/_c3eNTCXV 5.5V 1.5F supercapacitor

https://s.click.aliexpress.com/e/_c34v0X3Z

https://s.click.aliexpress.com/e/_c3uEgFrp Ideal diode anti-backflow module

https://s.click.aliexpress.com/e/_c2JzjLbh

https://s.click.aliexpress.com/e/_c2y5n2Rl Current-limiting resistors(100Ω 0.25w)

https://s.click.aliexpress.com/e/_c3cEqkqL

https://s.click.aliexpress.com/e/_c4CVv42x 3V LED filament

https://s.click.aliexpress.com/e/_c34P4svp

https://s.click.aliexpress.com/e/_c3nrscP9 ON/OFF switch(12*8MM)

https://s.click.aliexpress.com/e/_c4t1PP6n

https://s.click.aliexpress.com/e/_c38cbP55 Wires and small connectors(24 AWG)

https://s.click.aliexpress.com/e/_c3dsLmCP

https://s.click.aliexpress.com/e/_c3LxqX03 Screws for the crank mechanism

https://s.click.aliexpress.com/e/_c3afiObz

https://s.click.aliexpress.com/e/_c3dhpBV5 Fuseholder 6x30

https://s.click.aliexpress.com/e/_c4tUKfyL

https://s.click.aliexpress.com/e/_c4lq0uOF Glass Fuse 6mm x 30mm

https://s.click.aliexpress.com/e/_c4cnqxJh

https://s.click.aliexpress.com/e/_c45NKXaJ 3D printed enclosure, crank and internal mounting parts The project is designed so the electronics can be accessed from the front compartment, making assembly, testing and future modifications easier.