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Cheap and Simple Learning Board using AT89S51




Build your own a cheap simple Microcontroller learning board S-52. The board is based on ATMEL’s new ISP chip AT89S51, AT89S52, or AT89S53. This board can be used by beginners for learning Assembly and C language programming. Single sided PCB file included.

 


Introduction

I have designed this leaning board to be used as a tool for learning MCS-51 Microcontrollers.

The AT89Sxx learning board features,

  • Designed for new ISP chips, 89S51, 89S52, and 89S53, 40-pin DIP,
  • In System Programmable (ISP) through the 6-pin header and a jumper, (no need external programmer),
  • TxD and RxD serial port for communicating with serial devices,
  • 32 bit GPIO,
  • Onboard rectifier and +5V DC voltage regulator,
  • Single Sided PCB design.

Learning Board

Hardware

 

The board design is kept as simple as possible so that even a total newbie with microcontroller can easily make his owns learning board. The schematic shown below depicts the complete hardware of the AT89Sxx learning board. Port 0,1,2,3 are available for interfacing external devices. P3.0 and P3.1 are being used for UART.

Bill of Materials

 

R1                          330 1/4W +/-5%

R2                          10K 1/4W +/-5%

C1                         1000uF/16V electrolytic capacitor

C2                         100uF/16V electrolytic capacitor

C3                         100nF multilayer or ceramic

C4                         10uF/16V electrolytic

C5,C6                    33pF ceramic

D1                         1N4001 / 1N4002 silicon rectifier diode

D2                         Led

U1                         Lm7805, voltage regulator

U1                         AT89Sxx

DB25 parallel port, 25pins connector

 

For more detail: Cheap and Simple Learning Board using AT89S51

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