For showing slow AC on an oscilloscope or meter, or for demonstrating the use of a dynamo to light a lamp.

We are manufacturers and suppliers of the Bicycle Dynamo Assembly, serving Algeria, Argentina, Australia, Bahrain, Bangladesh, Belgium, Bhutan, Brazil, Cambodia, Cuba, Cyprus, Denmark, Ecuador, Egypt, Ethiopia, Finland, France, Georgia, Germany, Ghana, Hungary, Iceland, Italy, Japan, Jordan, Kenya, Kuwait, Malaysia, the Philippines, Tanzania and Uganda.