What are circuit boards used for?

Answer 1

A circuit works through a series of components mainly resistors, capacitors, and IC's. There are different types of IC's the main groups are AND, OR, NOR, & NAND. Those are just the basics you first learn about when dealing with electronics. These IC's work from what we call the binary code which is just a bunch of 1's and 0's. 1 is a logical high which gives you a positive voltage and 0 is a logical low which gives you no voltage. Lets say you have an and gate hooked up to a 150ohm resistor(it's used for voltage protection of your component)connected to a simple LED. In order to get this LED to have a logical high both inputs A and B have to get a high in order for your output to be high which in return allows voltage to pass through the resistor to your LED this powering your light emmitting diode. i hope this helped.
A circuit is just that a circuit of something. In electricity, it is the flow of electricity from the power source, through the wires, and back to the power source. You flip a switch, the power flows to the device, and continues back completing the circuit.

Answer 2

1. electrical connection of the parts into the desired circuit.
2. physical support of the parts.
3. modularity, allowing quick assembly and board swap repair.
4. heat sinking, some circuit boards are also designed to conduct heat away from parts to the cooling system.
5. etc.

Answer 3

Circuit on a circuit board receives electronic signals from the input port, processes it into electronic signals suitable for the machine at the output port and delivers output electronic signal at the output port.

Answer 4

Holding components and providing their electrical interconnections.