How to Use BASIC Stamp 2pe: Examples, Pinouts, and Specs

The BASIC Stamp 2pe (BS2pe-IC) is a microcontroller module manufactured by Parallax. It combines a BASIC interpreter with a microprocessor, enabling users to program and control electronic devices with ease. This module is ideal for hobbyists, educators, and engineers who require a simple yet powerful platform for prototyping and automation.

• Robotics and automation projects
• Data acquisition and logging
• Home automation systems
• Educational tools for learning microcontroller programming
• Prototyping and testing of electronic circuits

The BASIC Stamp 2pe is designed to provide a balance of performance and simplicity. Below are its key technical details:

The BASIC Stamp 2pe module has a 24-pin DIP (Dual Inline Package) layout. Below is the pin configuration:

The BASIC Stamp 2pe is straightforward to use, making it an excellent choice for beginners and professionals alike. Below are the steps and considerations for using the module in a circuit.

1. Power Supply: Connect the VDD pin to a regulated 5 V DC power source and the VSS pin to ground.
2. Programming: Use the Parallax BASIC Stamp Editor software to write PBASIC code. Connect the module to your computer via a serial or USB-to-serial adapter.
3. I/O Connections: Use pins P0 to P15 for interfacing with sensors, actuators, or other devices. Configure these pins as input or output in your PBASIC code.
4. Running the Program: Once the program is uploaded, the module will execute it automatically upon power-up or reset.

• Voltage Levels: Ensure all connected devices operate at 5 V logic levels to avoid damage.
• Current Limits: Each I/O pin can source or sink up to 20 mA. Do not exceed this limit.
• Decoupling Capacitor: Place a 0.1 µF capacitor between VDD and VSS near the module to stabilize the power supply.
• EEPROM Usage: The 16 KB EEPROM is divided into 8 banks. Use bank-switching commands in PBASIC to manage program memory efficiently.

Below is an example of PBASIC code to blink an LED connected to pin P0:

' BASIC Stamp 2pe LED Blink Example
' This program blinks an LED connected to pin P0 with a 1-second interval.

DO
  HIGH 0          ' Set pin P0 high to turn on the LED
  PAUSE 1000      ' Wait for 1 second
  LOW 0           ' Set pin P0 low to turn off the LED
  PAUSE 1000      ' Wait for 1 second
LOOP

1. Module Not Responding to Programming

   • Cause: Incorrect serial connection or power supply issue.
   • Solution: Verify the serial cable connection and ensure the module is powered with 5 V DC.

2. Program Does Not Run

   • Cause: Syntax error in PBASIC code or insufficient EEPROM memory.
   • Solution: Check the code for errors and ensure the program fits within the available memory.

3. I/O Pins Not Functioning

   • Cause: Incorrect pin configuration or excessive current draw.
   • Solution: Verify the pin mode (input/output) in the code and ensure connected devices do not exceed the current limit.

Q: Can the BASIC Stamp 2pe interface with sensors and modules?
A: Yes, it can interface with a wide range of sensors and modules, provided they operate at 5 V logic levels.

Q: How do I switch between EEPROM banks?
A: Use the BANK command in PBASIC to select the desired memory bank.

Q: Is the BASIC Stamp 2pe compatible with Arduino shields?
A: While it is not directly compatible with Arduino shields, you can use jumper wires to connect the module to shield components.

By following this documentation, users can effectively utilize the BASIC Stamp 2pe for a variety of electronic projects.