Two 4 mm socket terminals are provided for the dynamo output. Connected in parallel with an MES lamp holder & 2.5 V bulb.To understand the principles of electromagnetic induction and energy conversion by using a bicycle dynamo to generate electricity. A bicycle dynamo is a small electric generator attached to a bicycle wheel that converts mechanical energy into electrical energy through electromagnetic induction. As the bicycle wheel spins, the dynamo's magnet rotates, changing the magnetic flux through coils of wire inside the dynamo.