Have you changed mechanical energy into electrical energy ?

Just tie or hose-clipped a battery charged mini torch to the handle and that will do to attract attention of the road users. The brightness of such torch is constant and stable until the energy level reach its minimum. When that happen, just changed the battery.

In the past, all we need is a magnet and a coil of wire. If the magnet is kept still and the coil of wire is moved,  a voltage is induced in the wire. If the coil of wire is kept still, and the magnet is moved, a voltage is also induced in the wire.

The amount of voltage generated at a given interval is influenced by the strength of the induced electromotive force and electromotive is something that has to do with electricity and motion.

Have you changed mechanical energy into electrical energy ?

Modern answers usually is a 'No' while old answers is common 'Yes'

Before, car was a luxury to man. Today, car is a need. Before, motorcycle was a luxury to man. Today, motorcycle is a need. Car and motorcycle are mechanically powered, so man no longer has to convert mechanical energy into electrical energy.

There is still a man continuing to convert mechanical energy into electrical energy when he cycles to work and I met this man shortly before dinner today. After paying him RM35 for a fish to feast my ancestors on Chinese New Year, we have a chat. While chatting, I noticed he own an old bicycle which is depending on a dynamo to light up the head lamp. Quickly, I captured a picture to share it here. Children of tomorrow may find this item interesting. Children of yesterday enjoyed the dynamo and they enjoyed the increasing brightness of the light as they pedaled faster and faster. I have done that, have you ?

A dynamo is an electrical generator. It is a machine by which mechanical energy is changed into electrical energy.