Page 177 - Making PIC Microcontroller Instruments and Controllers

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5 VOLTS
2 TO 5 VOLTS AS
NEEDED BY
THE GAIE

1o KoHr\4s

3.VOLT LOGIC SIGNALTO
OPEN DBAIN OUTPUT
FLOATS AND CAN BE PIC INPUT
- PULLED UP TO
NEEDED
VOLTAGE
3-volt signals.