| Feature | Details |
| Compatible ICs | 40-Pin 8051 Family (AT89S51, AT89S52, P89V51RD2) |
| Input Voltage | 7V to 12V DC (via DC Jack) |
| Onboard Regulator | 7805 IC for stable 5V supply |
| Clock Circuit | 11.0592 MHz Crystal Oscillator |
| Interface | RS232 Serial Port (DB9) & ISP Header |
| Manufacturing | Proudly Made in India |
Product Description The 8051 Microcontroller Development Board is a robust and versatile educational platform designed for students, educators, and hobbyists to master the fundamentals of embedded systems. Built specifically for the classic 40-pin 8051 architecture (including the AT89S51 and AT89S52), this board provides all the essential peripheral circuits required to get started without complex breadboard wiring. It features an onboard power supply regulator, a high-precision 11.0592 MHz crystal for serial communication accuracy, and a DB9 connector for RS232 serial interfacing. Whether you are learning assembly language or C-programming (Keil), this Made-in-India board offers a reliable and durable environment for building everything from simple LED counters to complex industrial controllers.
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Key Highlights
Universal 40-Pin Socket: Features a high-quality ZIF or standard socket that supports most 8051-core microcontrollers in a DIP-40 package.
Integrated Serial Interface: Includes a MAX232-based RS232 port for easy communication with PCs, PLCs, or other serial devices.
Onboard Power Management: Equipped with a DC barrel jack and a 7805 voltage regulator, allowing the board to be powered by standard 9V or 12V adapters.
ISP Programming Support: Features a dedicated 10-pin In-System Programming (ISP) header for quick code uploads using standard USBASP or 8051 programmers.
User Peripherals: Includes a manual Reset button and a Power-on LED indicator to simplify the debugging and testing process.
Technical Specifications
Microcontroller Support: AT89S51, AT89S52, AT89C51, AT89C52, P89V51RD2.
Baud Rate Optimization: 11.0592 MHz crystal allows for zero-error standard baud rates (9600, 19200, etc.).
I/O Access: All 40 pins are broken out to easy-to-use male/female headers.
PCB Quality: High-quality FR4 double-sided glass epoxy PCB with green solder mask.
Dimensions: ~100mm x 80mm.
Installation Tip from Robogears When using the AT89S series, ensure your programmer supports the 10-pin ISP standard. If you are using the P89V51RD2, you can program it directly via the RS232 port using "Flash Magic" software without an external programmer. Always ensure your power adapter is Center-Positive. For first-time users: port 0 on the 8051 requires external pull-up resistors to function as a general-purpose I/O; check if your development board has these pre-installed or if you need to add them externally for your specific project.
Note: The product images provided are for illustration purposes only. The actual product may vary slightly in terms of design, color, or component layout due to manufacturing updates, but technical specifications will remain as described.