Projects to study circuits are the most basic projects requiring simple materials such as wires, basic switches, a dry cell, bulbs and a multimeter to measure the current for control. These materials are arranged in order with the switch and bulbs connected to the cell either in series or in parallel circuits using the wires. Multimeters should be connected in parallel to the circuits for correct readings. A circuit diagram may be developed from this project to help in analyzing the data effectively. From the data obtained, advantages and disadvantages of both parallel and series connections can be outlined
It is possible to build a flashlight using LEDs (light emitting diodes) in place of bulbs. A circuit involving a battery, a switch and the LED is made in this project and enclosed in a casing, preferably one from a used flashlight. The components are connected using a copper wire for efficient flow of current. Curved mirrors are optional in the project but if used would serve the purpose of concentrating the rays of light in one direction. Using LEDs makes the project economical; they require small amounts of current and the batteries last longer.
A simple door bell can be constructed using the following materials: a bell, magnetic wires, metal contacts, a bell hammer, bobbin, compass needle, spring and a base for the construction. All of these components are assembled to make an electric bell that operates using the principle of magnetism. The contraption is connected to a power source such as a battery and a remote buzzer to control when it rings.
Electricity is dangerous if not handled with care. Whenever operations are done involving electricity, take all the necessary precautions during the project such as wearing safety goggles and gloves. Keep the work station dry and organized to prevent accidents.