# Antenna board

The Kode Dot's antenna board schematic, KODE ToolKit Antenna V1: the NFC reader, the 125 kHz RFID front end, the haptic driver and the magnetic connector.

## What it is

The antenna board sits behind the back of the case and carries what needs to
be near the surface: the ST25R3916B NFC reader with its 13.56 MHz loop, the
125 kHz RFID front end with its own loop and the analogue chain that
demodulates a card, the haptic driver, and the magnetic pogo connector with
its fuse. It reaches the main board over a 20-way flex, which carries the
SPI, the I2C, the RFID lines and power.

The design is KODE ToolKit Antenna, number 2026003, revision V1, dated
2026-09-07, drawn in Altium by Versa Design for Kode. One A3 sheet.

## Schematic

Scroll to zoom and drag to pan. The four frames are the flex connector, the
magnetic connector and haptic driver, the RFID front end, and the NFC reader.

**Kode Dot antenna board, KODE ToolKit Antenna 2026003 V1**

- [antenna-board-schematic.pdf](/hardware/antenna/antenna-board-schematic.pdf)

The sheet as a plain image: [antenna board](/hardware/antenna/svg/antenna-board.svg).

## Files

- [antenna-board-schematic.pdf](/hardware/antenna/antenna-board-schematic.pdf): the schematic, one A3 sheet.
- [antenna-board.svg](/hardware/antenna/svg/antenna-board.svg): the same sheet as SVG.

**TBD**: the KiCad sources, the manufacturing package and the licence.