Many of your projects require the use of resistors of various strengths in the circuit, so you might want to know what resistors do, how they work, and what happens if you leave them outside.

Let's start with some words: electricity is the flow of electrons, which are negatively charged particles.

Voltage is the difference in charge between two points in a circuit. Voltage is also a force of current.

Current measures the speed at which electrons flow.

A simple way to understand the difference between voltage and current is to consider the tank drained through a hose connected to the bottom hole. In this case, water acts like an electric current. Voltage is the amount of water pressure, and current is the speed of water flow.

Resistance measures the ability of a material to resist electrons flowing through it.

If the width of the hose at the bottom stays the same, then water flows faster through the hose by adding more water to the tank. Similarly, adding more voltage to a circuit increases the current.

However, if the hose is replaced with a smaller hose, the same water pressure will produce a slower flow. Hose dimensions provide resistance and reduce current. The resistors in the circuit serve the same purpose, reducing the current through the components they use.

How does the resistor resist?

The resistor in the project is a through-hole resistor material designed with two flexible ends for bending and inserting into the breadboard. The core of a resistor manufacturer is formed by helix or helix of conductive material wound around an insulating core. The material is very, very thin, which forces the current to slow down, providing resistance. To increase the amount of resistance, increase the number of rings in the helix.

What happens if I don't use resistors?

If the current passing through the element is too large for the element to handle, it may overheat the element and may cause damage to the element, or it may cause damage to the microcontroller. Without proper resistors, LEDs will burn out quickly.

If you want to safely see the effect that a resistor material might have on the circuit, instead of using a wire to connect the buzzer to the ground, use a resistor. You will see that the reduced current will make the buzzer quieter.