Modelling and simulation

Electronic circuits can be modelled in real life using a prototyping [prototyping: making one-off working models to find out if an idea works. ] board - also known as a breadboard [breadboard: a prototype circuit made from a plastic board with holes in which the components are inserted, linked by conductor traces on the underside. Also called a veroboard. ]. However, this can be time consuming and uses real components, which can be damaged. Computerised simulation software can be used to test circuits without the need to physically build them. In addition, the computer simulation can be saved and edited.

Simulationsimulation: the artificial recreation of an event or activity, eg flight simulation software software can also be used to simulate control programmes for programmable interface controllers (PIC [PIC: Programmable Interface Controller - a device which can be programmed via a computer to control complex circuits. ]s). Typically, flowchart symbols can be placed or dragged on-screen. The action will be simulated to ensure that they operate as intended.

Advantages and disadvantages of using modelling and simulation

Advantages

• Doesn't require any physical components, so money isn't wasted on expensive parts
• Speeds up production process.
• You can save and edit ideas, which makes it easier and cheaper to modify your design as you go along.
• You can choose pre-drawn circuits or system blocks, which speeds up the process even further.

Disadvantages

• The software itself can be expensive so initial costs are high. There are free software packages though.
• Staff need to be trained how to use the software, which also adds to costs.
• Requires a PC.
• It doesn't always accurately simulate 'real world' circuits or ideas, so may not be as effective as a prototyping board.