Hellen NB1

Download release firmware

Snapshot firmware bundle

https://github.com/rusefi/hellen-NB1-issues

Interactive Pinout

Miata 1999

ibom rev a

neomiata 2000 Wiring Diagram

Schematic Rev A

Options Port

Pin	Type	Comments
4A	Ground
4B	Digital Input	Flex Sensor
4C	Temperature or PPS2	Temp or ETB Pedal
4D	Boost Controller Output
4E	VVT Output
4F	+5v
4G	WBO Vs/Ip	LSU 4.9 Pin 2
4H	WBO Vs	LSU 4.9 Pin 6
4I	WBO R Trim	LSU 4.9 Pin 5
4J	WBO Ip	LSU 4.9 Pin 1
4K	WBO Heater -	LSU 4.9 Pin 3
4L	+12v	LSU 4.9 Pin 4

Options Port Schematic

Additional Hardware

Options Port Connector

LSU 4.9 Wideband Connector

LSU 4.9 Wideband Sensor Or Similar

Changelog

rev B Nov 30, 2021

• high-side outputs protection

rev A

• good to drive, great success!