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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

  • 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.

How it compares

Measured against everything we stock in Passive Components & Solder Supplies, at today’s prices. Recalculated every night.

Price $124.99
Pricier than about 85% of the 265 comparable items (median $9.99).

Specifications

Product
Product 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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