2023-01-06 17:10:33 -08:00
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# Hellen NB1
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2021-11-17 07:29:30 -08:00
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[Download release firmware](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_hellen-nb1.zip)
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2021-10-26 16:44:50 -07:00
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2021-11-17 07:29:30 -08:00
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[Snapshot firmware bundle](https://rusefi.com/build_server/rusefi_bundle_hellen-nb1.zip)
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2021-10-26 16:16:43 -07:00
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2022-01-24 17:21:25 -08:00
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[https://github.com/rusefi/hellen-NB1-issues](https://github.com/rusefi/hellen-NB1-issues)
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2021-06-15 04:59:39 -07:00
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2021-10-26 17:38:34 -07:00
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[Interactive Pinout](https://rusefi.com/docs/pinouts/hellen/hellen-nb1/)
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2021-06-15 08:05:18 -07:00
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[Miata 1999](Mazda-Miata-1999)
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2021-11-17 07:29:30 -08:00
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[ibom rev a](https://rusefi.com/docs/ibom/hellen64_NB1-a-ibom.html)
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2021-09-14 07:35:31 -07:00
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2021-09-17 09:39:02 -07:00
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[neomiata 2000 Wiring Diagram](http://neomiata.com/garage/Wiring%20Diagrams/Wiring%20Diagrams%201997-2000/2000_Miata%20Wiring%20Diagrams.pdf)
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2021-09-14 07:35:31 -07:00
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2021-10-07 14:49:44 -07:00
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[**Schematic Rev A**](Hardware/Hellen/hellen64_NB1-a-schematic.pdf)
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2021-10-07 14:53:05 -07:00
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2021-10-07 14:49:44 -07:00
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2021-10-29 09:45:06 -07:00
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## Options Port
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2021-09-17 09:39:02 -07:00
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| Pin | Type | Comments |
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|---|---|---|
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| 4A | Ground | |
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| 4B | Digital Input | Flex Sensor |
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| 4C | Temperature or PPS2 | Temp or ETB Pedal |
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| 4D | Boost Controller Output |
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| 4E | VVT Output | |
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| 4F | +5v |
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| 4G | WBO Vs/Ip | LSU 4.9 Pin 2 |
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| 4H | WBO Vs | LSU 4.9 Pin 6 |
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| 4I | WBO R Trim | LSU 4.9 Pin 5 |
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| 4J | WBO Ip | LSU 4.9 Pin 1 |
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| 4K | WBO Heater - | LSU 4.9 Pin 3 |
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| 4L | +12v | LSU 4.9 Pin 4 |
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**Options Port Schematic**
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2021-10-07 05:44:51 -07:00
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2021-09-17 09:39:02 -07:00
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## Additional Hardware
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2021-10-07 05:44:51 -07:00
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[Options Port Connector](https://www.bmotorsports.com/shop/product_info.php/products_id/4462)
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2021-09-17 09:39:02 -07:00
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[LSU 4.9 Wideband Connector](https://www.bmotorsports.com/shop/product_info.php/products_id/2081)
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2021-12-03 09:43:10 -08:00
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[LSU 4.9 Wideband Sensor](https://www.bmotorsports.com/shop/product_info.php/products_id/1645) Or Similar
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2023-01-06 17:10:33 -08:00
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## Changelog
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2021-12-03 09:43:10 -08:00
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2023-01-06 17:10:33 -08:00
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### rev B Nov 30, 2021
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2023-01-02 11:22:23 -08:00
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2021-12-03 09:43:10 -08:00
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* [high-side outputs protection](https://github.com/rusefi/hellen-NB1-issues/issues/25)
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2023-01-06 17:10:33 -08:00
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### rev A
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2021-12-03 09:43:10 -08:00
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* good to drive, great success!
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