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Green Raspberry Pi expansion board with LED nixie tube, DB9 port, buttons and GPIO header

Bazarc

Bazarc Raspberry Pi GPIO-232 expansion board with LED nixie tube

SKU CH-5980-XSB1C

Adds RS-232, RS-485, EEPROM, LEDs, buttons, buzzer, digital tube and TF card slot to Raspberry Pi GPIO

  • TypeOther
  • Adds serial connectivity with RS-485 and RS-232 interfaces
  • Stores settings in 24C16 EEPROM memory chip
  • Shows data on 4-in-1 LED nixie tube display
  • Provides input via three buttons and a buzzer
  • Breaks out remaining GPIO pins and adds TF card slot

What this board adds

This expansion board fits Raspberry Pi 3B+, 3 and 2 models and brings RS485 and RS232 serial interfaces, an EEPROM, three LEDs, three push-buttons, a buzzer, a four-in-one digital tube display, a TF card slot using SPI and a breakout for the remaining GPIO pins. The LED nixie-style tube gives a visual readout for status or data without needing a separate screen.

Who it suits and who it does not

Makers building industrial or automation prototypes that need both 485 and 232 ports on a single HAT will find the combination convenient. Projects that require only one serial standard, need a different display type or rely on a HAT form-factor for a newer Pi 4 or Pi 5 should look elsewhere.

The deciding specification

The board provides both an RS485 module and a green DB9 RS232 port on the same PCB, so the choice hinges on whether your application needs those two legacy serial interfaces together.

Highlights

  • Adds serial connectivity with RS-485 and RS-232 interfaces
  • Stores settings in 24C16 EEPROM memory chip
  • Shows data on 4-in-1 LED nixie tube display
  • Provides input via three buttons and a buzzer
  • Breaks out remaining GPIO pins and adds TF card slot

Specifications

TypeOther

Questions about this item

What Raspberry Pi models must I already own for the GPIO-232 board to connect?

The board is designed for Raspberry Pi 3B+, 3 and 2, matching their 40-pin GPIO header.

Will the on-board RS485 and RS232 ports work with legacy serial devices I still use?

Yes, the green DB9 provides RS232 levels and the RS485 module handles differential signals for older industrial gear.

How can I confirm the LED nixie tube and buzzer are functioning after I power up?

Run a test script that drives the 4-in-1 digital tube and sounds the buzzer; the three LEDs and three buttons also give immediate visual feedback.

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