Components

	AMP - TE Connectivity - 174917-6 48 Pin Connector AMP - TE Connectivity	x 1
	Conn Shrouded Header (4 Sides) HDR 40 POS 2.54mm Solder ST Top Entry Thru-Hole Bulk Samtec	x 1
	TLW-102-06-G-S Samtec Inc.	x 1
	TLW-103-06-G-S Samtec Inc.	x 1
	1N4732A-TAP VISHAY SEMICONDUCTORS	x 1

Tools, APP Software Used etc.

fritzing

Description

NA6 Miata to Speeduino v0.4.x Adapter Board Rev. C

This adapter board is designed to interface the stock NA6 (1990–1993 Mazda Miata) ECU connectors with a Speeduino v0.4.x board without requiring any modification to the vehicle’s factory wiring. It provides a clean, plug-and-play solution for DIY engine management enthusiasts who want to retain the original harness and connectors.

A 40-pin IDC ribbon cable is required to connect this adapter board to the Speeduino v0.4.x board.

Key Features:

Seamless integration between NA6 factory ECU connectors and Speeduino

No cutting, splicing, or modification of stock wiring

Compatible with Speeduino v0.4.x boards

Compact, easy-to-install design

Perfect for Miata tuners looking for a non-destructive way to install standalone engine management.

Schematic and Layout

Speeduino Hardware Repo

https://github.com/speeduino/Hardware

Download Gerbers Download BOM(Bill of materials)

May 31,2025

241 views

NA6 Miata to Speeduino v0.4.x Adapter Board Rev. C

Plug-and-play adapter board to connect NA6 Miata ECU connectors to Speeduino v0.4.x—no wiring mods needed.

241

Published: May 31,2025

Standard PCB

Download Gerber file 2

BOM(Bill of materials)

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