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Optical Serial Interface

Optical Serial Interface
It is sometimes necessary to install microcontrollers quite far away from data processing systems, such as in temperature measurement systems, security systems and other situations. An interference-free connection between the two parts of the system is thus an absolute ‘must’. This simple optical interface is excellent for this sort of application.The system consists of two parts: a transceiver (Figure 1) using a MAX323, which is connected to the serial bus of a PC, and an even simpler transceiver (Figure 2) at the microcontroller end.
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