TTL <> RS232 Conversion

By : Olivier de Broqueville

Introduction

This small realization, based on one of the most common IC (MAX232) is designed to create a small and convenient TTL to RS232 and vice versa convertor.

All you need is 4 caps, one IC and 2 connectors. If you want to add a small regulator on the board (already foreseen on the PCB) you just need to add a 78L05 regulator and a cap.

If you do not need to regulate the power supply, you can just replace the 78L05 by a strap (pin1 to pin 3) and drop the 78L05, C1 and C2.

Schematic

PCB

• All Files and Prints (ZIP file)

• Board Print for TCI3 (see How To concerning PCB design to get and use TCI freeware)

Componants implementation

Componant list

Olivier de Broqueville October 2003

(Last revision 10/11/03)