Книга: Introduction to Microprocessors and Microcontrollers

Choice of systems

Choice of systems

A few metres

We can use the raw binary data transmitted over a simple cable (see Figure 17.11).

Figure 17.11 A very short range link up

Tens or hundreds of metres

We can convert the transmitted signal to RS232C or RS423A as necessary (see Figure 17.12).

Figure 17.12 Around the building

Unlimited range

Add a modem and link by telephone or optic fibre (see Figure 17.13).

Figure 17.13 Around the world

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