Add printing capability to any microcontroller project with just the bare internals of a thermal receipt printer. Send text, barcodes, bitmap graphics, and even QR codes over a simple 3.3V–5V TTL serial connection — no complex drivers needed.

This "guts only" version includes the motor/heater assembly with flex cable, the control board, a TTL cable, and a 33-foot roll of thermal paper. There's no enclosure or paper bay, so you can design your own housing and feed in as much or as little paper as you like. Power the VH pin with 5–9V DC (7.5–9V recommended for the darkest prints).

Key Features

• TTL Serial Interface – Simple 3.3V–5V serial connection to any microcontroller
• Rich Text Formatting – Bold, underline, inverted text, and three font sizes (small, medium, large)
• Flexible Layout – Left, centre, and right justification with variable line spacing
• 11 Barcode Formats – UPC A, UPC E, EAN13, EAN8, CODE39, I25, CODABAR, CODE93, CODE128, CODE11, and MSI with adjustable height
• Custom Graphics – Print monochrome bitmap images and QR codes
• Enclosure-Free Design – No paper bay means full flexibility for custom enclosures and creative paper routing

Specifications

• Interface – TTL serial (3.3V–5V)
• Power Supply (VH) – 5–9V DC (7.5–9V recommended for best print quality)
• Print Method – Direct thermal
• Paper Width – Standard thermal receipt paper

Ideal For

• IoT notification printers and data loggers
• Custom receipt and ticket printing
• Interactive art installations
• Raspberry Pi and Arduino projects

Package Contents

• 1× Thermal printer motor/heater assembly with flex cable
• 1× Control board
• 1× TTL cable
• 1× Thermal paper roll (33 feet)

Resources

• Adafruit Tutorial & Arduino Library