Mini Thermal Receipt Printer

This compact thermal printer is designed for integration into microcontroller and embedded projects. It uses standard 2.25" (57.5mm) thermal paper and prints without ink using a thermal print head.

The printer communicates via TTL serial (19200 baud) and operates from a 5–9V DC power supply. It supports printing text in multiple sizes, barcodes in various standard formats, custom bitmap graphics, and QR codes.

It is suitable for use with Arduino, CircuitPython, and other microcontrollers that provide a hardware or software UART interface.

Thermal paper is not included.

Technical Specifications

Paper & Printing

• Paper type: Thermal paper

• Paper width: 57.5 ± 0.5mm (2.25")

• Maximum roll diameter: 39mm

• Printing width: 48mm

• Resolution: 8 dots/mm (384 dots per line)

• Printing speed: 50–80 mm/s

• Mean cycles before failure: 5 million lines

Electrical

• Interface: TTL Serial

• Baud rate: 19200

• Logic level: 3.3V–5V

• Supply voltage: 5–9V DC

• Current requirement: 1.5A during printing

Fonts & Character Sets

• ASCII

• GB2312-80 (Chinese)

• ANK font: 5×7

• Chinese font: 12×24, 24×24

Mechanical

• Dimensions (W × D × H): 111 × 65 × 57 mm

• Installation opening: 103 × 57 mm

• Mounting screws: M2.5

• Color: Black

Environmental

• Operating temperature: 5°C to 50°C

• Operating humidity: 10% to 80%

• Storage temperature: -20°C to 60°C

• Storage humidity: 10% to 90%

Requirements

• 5–9V regulated DC power supply (≥1.5A recommended)

• 2.25" thermal paper roll (max 39mm diameter)

• Microcontroller with UART (hardware or software serial)

Supported Barcode Formats

• UPC-A

• UPC-E

• EAN13

• EAN8

• CODE39

• I25

• CODABAR

• CODE93

• CODE128

• CODE11

• MSI