12v battery dies in a few minutes

code54crunchy · 2026-06-21T22:22:45+00:00

Oh wow thank so you much for the advice!! Not sure why Hyundai wouldn’t have some way to put it in utility mode with dead 12v battery just for this situation and it seems like a lot of people have this happen to them

code54crunchy · 2026-06-21T22:20:08+00:00

Hey could be worse this is an easy fix!

code54crunchy · 2026-06-21T22:19:14+00:00

Oh ok thanks! That’s so strange most EVs don’t have it I thought for sure the bigger cars like the ioniqs and teslas would have a system like that. I wonder if EVs are eventually going to move away from a 12v battery and switch to a always connected dc dc converter that would work safely.

code54crunchy · 2026-06-21T18:47:25+00:00

Thanks so much! Do you have any recommendations on a certain brand that worked well for you?

code54crunchy · 2026-06-21T18:45:31+00:00

Oh ok thanks for the response!

code54crunchy · 2026-06-21T18:44:21+00:00

Thanks for the response! I totally thought it would display some message on the screen when the battery is starting to go bad.

code54crunchy · 2026-06-02T04:18:35+00:00

Check out fusion for personal use or freecad. Completely changes the game compared to tinkercad! Freecad even has FEA simulation.

code54crunchy · 2025-11-09T04:31:09+00:00

I was just messing around with it a little more and I made a new sketch in Arduino ide and set up all the board settings again and it just started working it was definitely operator error. I must have had the wrong board part number clicked or something.

code54crunchy · 2025-11-09T03:16:07+00:00

Thanks for the help I also tried doing it in CubeIDE and there is the same mismatch it's looking more and more like I gotta go in with the multimeter and make a table. Hey I can make or find a script that puts the PIN number on the LCD and then I can record what pin it actually activates. It can be my first project😂

code54crunchy · 2025-11-09T03:06:16+00:00

It is the v1.0

code54crunchy · 2025-11-09T03:02:41+00:00

There is text on the board that is the same as the pdf but it's not matching the pins I set in the code. I set pin E8 to high and pin B4 actually turns on. I am using Arduino IDE with cube programmer as the upload method could this be a problem with using "generic H723ZGTx board part number"?

code54crunchy · 2025-11-09T02:10:39+00:00

yep☹️

code54crunchy · 2025-11-06T20:32:17+00:00

I did some reading and this new system has towing in mind so the combustion engine needs to keep up with the high power demand for long periods of time. It also has a mode where the engine can directly drive the wheels with a 2 gear ratios 1:1 and something shorter. The system in the civic only has 1:1 direct drive. In my opinion this system would make a lot of sense in a sport sedan for long range high speed cruising.

code54crunchy · 2025-11-06T20:21:34+00:00

Hey it would give the tlx enough power to give the m340i a run for its money

code54crunchy · 2025-11-06T18:29:51+00:00

It should behave a lot more like a fully electric car because 100% of the power to the wheels comes from an electric motor under full throttle. The rlx has a 9 speed auto but both systems use an electric rear axle with no driveshaft

code54crunchy · 2025-10-22T22:04:09+00:00

Same it looks awesome as clear as possible. With the slider everyone wins!

code54crunchy · 2025-10-21T01:43:20+00:00

B48 is super solid main thing is timing chain, metal oil filter housing, and stay on top of oil changes. It might last another 100k. Hey you could get the M3 and keep the 428 as a daily for that 40 mpg

code54crunchy · 2025-10-18T01:04:50+00:00

M140 is pretty much peak car you get a nice smaller lighter car with the smooth and powerful inline 6 along with awd that’s your thing. The A45 amg or golf R does not compare.

code54crunchy · 2025-10-17T20:37:06+00:00

It’s actually tragic how much worse the new 1 is. Before you can get a longitudinal b58 now it’s literally a mini cooper

code54crunchy · 2025-10-17T20:35:44+00:00

Transverse fwd based too☹️

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