By turning the large disc by hand, the generator is driven to rotate, and the output power is realized. Interesting science and education works, exercise manual brain ability, show hand-cranked electricity.
eBay
Versatile Functionality: This device serves dual purposes; it functions as both a hand crank generator and a reduction gearbox, providing flexibility for different applications. Connect the motor directly to the battery, it can be used as a reduction gearbox, it is a reduction motor, the handle will automatically rotate, and it has a large torque.
eBay
Specification Model: F20 Color: Blue Material: Metal Style: Modern Shape: Rectangular Mount Type: Freestanding Assembly Required: Yes Operation Mode: Manual Maximum Direct Output Voltage: Approx. 28V No Load Output Voltage/ Current: 3V/6.6A, 5V/4A, 6V/3.3A, 9V/2.2A, 12V/1.6A, 15V/1.3A (The Actual Current will Vary with the Capacity of the Charged Product Battery.) Maximum Power: About 20W Product Size: 12.7*8.6*8.8cm/5*3.39*3.46in Package Size: 19*10*12cm/7.48*3.94*4.72in Gross Weight: 0.82kg/1.81lbs.
eBay
AC220V, among which, the maximum output current of 5V can be 3A, 12V20A, and AC220V is 30W. AC220V output power: 30W. 1 pc of generator. USB 5V maximum output current: З A. Capacity: 20F8 string (equivalent to 800mah battery).
eBay
Dynamo generator, the greater the speed of shaking the greater the power, the maximum power of about 20w. Max power: 20W. -Power generator strong. 1 x Generator. Rotating speed: 2000rmp/min. -Small size, easy to carry.
eBay
1x DIY Hand Cranked Generator Kit. 【Learning Tool】: Encourage curiosity and enhance problem-solving skills with this interactive science project that aligns with STEM education goals, fostering a love for science in children.
eBay
eBay
Peak load power: 20W. Peak output current over: 1500mA.
eBay