Do you know what battery it is supposed to be connected to


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Found that it was part of a modular battery pack made by Romeo Power Inc for commercial trucks. This company was bought and then liquidated by Nikola in 2023.

EVWest is selling one of these packs and you ...

If I was wiring up a after market ECU id be bypassing the 36.5k resistor and seeing what happens then


It's working ! Thank you.

Now, what kind of circuitry would it take to convert the same TachoOut PWM signal into a signal (Si) suitable for the Speedometer?

Originally, the signal for the ...

find the tacho signal wire into the tacho, 95% of the time it will go through a 10-20k Ohm resistor first thing, I bypass that and also if needed add a 1-10k resistor pull up to 12v so the aftermarket ECU can drive it like I would like.


Please see the diagram of the igniter signal rectification ...

I am going to try with an inline capacitor.


You are saying you get signal from the negaitve side of the coil? Does this mean negative in relation to chassis GND?


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Right now my configuration to make use of the original dash would be as follows:
OIL_PUMP_PWM pin (TachoOut signal ...

I don’t have a scope and can only measure the PWM signal average value according to duty cycle.
When I measure the amplified TachoOut signal with my multimeter, I get 6.55V which is expected at 50% duty cycle.

With the same multimeter, I found that the lowest signal voltage for my tacho gauge to ...

New try

muehlpower wrote: ↑Wed Sep 24, 2025 7:39 am Connect the collector to the input of the tachometer, the emitter to GND, and the base with 1k ohm to the output of the Zombi.

Something like that?

What kind of sensor do you use to simulate? Engine flywheel signal, spark plug feedback or transmission toothed drive?


Would your Arduino Nano interface board take a transmission toothed wheel signal as input and output a Tacho pulse signal (12V, 10-375Hz) and control a stepper motor (0-5V) to ...

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I am using Zombieverter firmware 2.30A driving a GS450h setup on a “Classic” car :

Tested with a cheap PWM generator, my digital tachometer is working with a minimum of 11V (average), 50% duty cycle PWM signal (10 to 375Hz full gauge range).
I am trying to use the TachoOut signal on ...

By removing the control board I was able to add two fused Amphenol PL082Y connectors to this box for charger/heater and have the battery cables coming from below.

The list disappear when the FlyingADC BMS (on CAN2, IVT Shunt on CAN1) is powered and enabled at the same time as the ZombieVerter is powered.
The list and saved CAN mappings reappear after one or two webpage refresh.

Yes, they are all here.

Hello,
I am sure I'm missing something here but when opening a "New CAN Mapping" window the parameter list shows only "No Options".
Please Help.
I tried with Safari and Firefox.
I am using a ZombieVerter VCU V1a Firmware v2.22A; Web Interface : v2.0; Wi-Fi ESP8266

Bonjour,

I am Antoine, from Montreal, QC. Biochemist by trade.
I am in the process of converting a Toyota Supra 1985 the GS450h way (+ A123 batteries). As I didn't follow the first rule of EV swaps (don't buy a rust-bucket), I am assembling the EV components and rebuilding the car body and swapping ...

Did the box came with a lid cover? I am intrigued by the vertical HV connections.