Home Projects Miscellaneous RS232 - MAX232 Interface Module


RS232 - MAX232 Interface Module
author: Rajkumar Sharma


This project is a RS232 Interface Board based on MAX232 IC.


This project  provides you a simple and easy solution to connect / convert your Microcontroller input/output to be connected to the serial port of the Computer.

 This projects build around  popular  MAX232 level shifter IC to do the Level Shifting (Voltage) between 5 V and 12 V DC.

An Onboard 9 pin female D connects this PCB to the Serial Port cable (not supplied with the Kit). Connector J1 connects to the Host for power supply and serial In/Out signals.

A Provides data from the Computer to the Host (RXD)
B Provides data to be sent to the Computer from the Host (TXD)


Supply 5V DC @ 50mA
MAX232 based Level Shifter IC  
Simple and straight forward design  
Easy connection via relimate/Header connector to your HOST interface  
Supply provided by the host interface  
Four mounting holes of 3.2 mm each  
PCB dimensions 40 mm x 33 mm




 Parts List

 PCB Design


PCB top and bottom layers



120x90 spot



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