A well made hand cranked dynamo producing DC current/voltage that is ideal for experiments in energy transformation, electricity and gearing.

Wire two dynamos together to do energy experiments showing mechanical to electrical and electrical to mechanical energy, efficiency etc. Place a high current load, like a filament lamp, across the output and observe that it is harder to turn the crank than when a low current load, like a LED, is connected.

Features:
• Cranking (rotating) the handle generates up to 15 volts DC
• Power a motor, light a miniature light bulb or LED (may require a dropping resistor)
• If the handle is rotated clockwise, the red clip will be positive, the black clip will be negative.
• If the handle is rotated counter-clockwise current will flow in the opposite direction red will be (-) and black will be (+)

Experiment suggestions:

Primary or simple studies while hand cranking the dynamo:

• With the dynamo's alligator clips connected to nothing (called an open circuit or no load) - is there mechanical resistance to the cranking motion?

• With the dynamo's alligator clips connected to each other (a short circuit) - does the mechanical resistance change?

• Connect a 6 to 12 volt bulb to the dynamo, what cranking effort is required to light the bulb, is there mechanical resistance?

• Use Play-Doh to connect the dynamo to a LED, does the LED light up when the dynamo is cranked? What happens if you change the direction of cranking? Did the mechanical resistance change?

Senior studies:

• Energy measurements: Connect the alligator clips from two dynamos, red to red and black to black, hand crank one while measuring the energy involved in making the second dynamo rotate, measure the energy with multimeters or even data log the experiment using the Vernier Go Direct Energy Sensor with free Vernier Graphical Analysis for all platforms.

• What happens if you reverse the cranking motion or reverse the cable connections to red to black and black to red?

• Voltage polarity observation: Use a multimeter or data logging probe like the Vernier Go Direct Voltage probe with free Vernier Graphical Analysis apps to determine the polarity of the output voltage when the dynamo is cranked in a clockwise and counter clockwise direction.

• Warranty: 1 year

  Last edited 19th Aug 2024

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  Videos:
  
  Hand Cranked Dynamo Watch Stuart demonstrate the Hand Cranked Dynamo
  
  
  

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  Documents:
  Catalogue	May 2024 Web Catalogue

  
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