Simple RS232 Serial Interface Circuit


Posted on Feb 7, 2014

The circuit for the rs232 serial interface is of mild complexity. The main parts of the circuit are the 18F4520, MAX233A and DB-9 Connector and these portions of the circuit will be described briefly below. This is a basic +5v power regulator circuit for the digital signals/components. All components in this circuit use this regulated +5v for po


Simple RS232 Serial Interface Circuit
Click here to download the full size of the above Circuit.

wer. The input is simply from a +9v battery. The PIC has two man chores for this circuit. The first is receiving and sending RS232 serial communication commands and the second is turning off and on specific LEDs depending on which command is received. The MAX233A IC acts more like a translator for going from the digital +5v/+0v and into the RS232 +12v/-12v signals. This `translation` is necessary in order to create the proper RS232 signals for the receiver to understand. Outgoing Signals are translated through the TXin/TXout and incoming signals are translated through the RXin/RXout pins.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Ballast Control IC Design
    Universal Test Probe
    Electronic oscillator
    buzzer only beep once
    RA-203
    PULSED MODULATED LASER
    In-Cab Winch Controls and Winch Power Disconnect
    OPTICALLY COUPLED V F
    Amateur Radio Projects
    RF Probe and Watt Meter
    Automated Attendant burglar alarm circuit
    Gentleman AM50 amplifier circuit
    A common emitter amplifier
    Attenuation feedback tone circuit



    Top