Here has been presented the sure complex for the transfer RS232 of signal on microcontroller. Has been dimensioned so that submits passing impulses and to 100V on the entry. Purpose of complex insures the galvanic isolation and protects microcontroller from the high tranzijentnog voltage on the entry. Complex is one-way i.e. microcontroller across cares only first-class impulses of serial communication. Complex is successfully are used in D6 display
Earth and entry GND signal has been needed the joined set on the source of signal. The minimal current through RX entry has been needed 1,6mA. Entry resistors 1K are wire strengths 1.5W.