Im going to do the P Mosfet route. Only downside i see is a bit of cost and board space. Yeah, I'll take you up on that. I'll pm you my contact info soon. Might be a few days before I get back to working on this. Edit, I don't think it's worth going through all that if it's the non heatsink version.

Zieg wrote: ↑Fri Apr 26, 2024 5:24 pm ...I don't have a lot of testing hours on it yet, but so far so good with the 11ohm contactors.

That contactor is 1.27A with 11 ohms @ 14v.

Is that the heatsink version of the DRV103 on the board?

Do you have a spare board you could test with your Pacifica contactors?

This board is setup for the Powerpad SO-8 which has a thermal pad that gets soldered to the board. Its higher heat dissipation means it can carry more current. The normal SO-8 (non-powerpad version) is also drop in for this board but it doesn't have the heatsink, so only rated for 1.5A. The DRV103H ...

I'm looking for feedback on contactor coil resistance. One of the contactors I see the most is the EV200AAANA. This has an economizer built in but has a coil resistance of 3.14 ohms for 4.6 amps at 14v. This is out of the range of the DRV103H, Over Current Fault An over-current fault occurs when the...

I'm ordering a batch of 5 to test, I just pre-ordered the DRV103 chips.

I need to find a couple contactors without economizers to test with, even if their high voltage contacts are shot. Anyone know a part number / vehicle for 3 amp (coil) contactor and maybe where to find them cheap?

When you say you have to pre order the DRV chip, do they still solder it or is it shipped loose? And is that included in the $15? They solder it if you pre order it. There's a minimum qty of 5 boards from JLC. It was a bit over $70 for 5 completely populated boards, then add shipping and tax. You c...

V0.0 of this is done but not tested yet. https://github.com/jrbe/2-Coil-Economizer-PCB Allows different settings with solder jumpers. They are about $15USD each fully populated. You will have to pre order the drv103 chips from JLC though. PCB Editor.PNG Top Bare.PNG Bottom.PNG Top W Components.PNG i...

....What if the acceleration profile can be change with an ECO/Sport mode buttons I always saw this as a gimmick. Give a throttle profile that makes a vehicle feel very powerful but drop your throttle granularity up top. Feels fast but not as smooth to drive. Pedal remap devices can help correct po...

muehlpower wrote: ↑Sat Apr 20, 2024 12:20 pm Does anyone know what happened to howardc64?

Is it common for the forum to mark all of a users posts as deleted if they leave?

If not, I'd guess he started a rebuilding service for these and decided to take his info with him - but I have no idea for sure.

I've been slowly working on this between other things. This s what I have currently. The duty cycle is selectable with solder jumpers. 0 = 14.3% 1 = 17% 2 = 19.75% 3 = 21.8% 4 = 23.9% 5 = 26% 6 = 28% My thought is to set this up with 3 solder jumpers shorted (that can be cut to open) to default to 2...

Did my first (very short) drive today! Congratulations! I'm a huge fan of lightweight, this looks like a blast to drive. The wheel alignment was a challenge but I think I got it close enough for now. Measuring and adjusting caster was quite a challenge, next time I might invest in some turn plates ...

Kicad libraries is definitely somewhere that I struggle, sorry for the issue. I have uploaded the folders & files to github and reorganized the folder structure to mimic what I think the missing files snip is showing. I did add these files in the project, I think Kicad will find them... You may ...

Slightly related to this subject, but is that "common retaining ring" a standard size for most drive axles and where do people normally buy those? :D I haven't found a source for the retaining rings yet. If you have an axle rebuilder nearby they can likely get them or might have them in s...

MattsAwesomeStuff wrote: ↑Sun Apr 07, 2024 12:14 am I might still be ahead of you on breaks and mistakes though.

Fixed that for you

High precision CAN termination looks overengineered. The harness will have much more tolerance of the cable impedance, 10% is no problem. Thanks for the feedback Uhi. This is a bit different than a single 10% 120 ohm vs using a single .1% 120 ohm termination resistor, so I'll explain in case it's p...

... V0.0.4 is done and up on Github (see my signature below.) Should be ready to order. Wiki is updated with V0.0.4 changes as well. *Edit, this isn't tested yet.* JLC doesn't have any low tolerance 60 ohm resistors, at least that I could find. Ended up doing 2 parallel 120 ohm resistors for each C...

The Hyundai HSG starter / generator could be another option for testing.

This is mostly done.

Struggling with rotations for JLC, fabrication tool kit, and jlc's site seemingly pulling in old Gerbers, pos, and bom files. I'll keep picking away at it but it will be a bit.

Looks good to me! One thing I thought of. The throttle inputs I've seen listed as 0-6.6v input. Is that a usable analog input range or just what voltage can be on those inputs without blowing up the STM32? Basically asking if adding a voltage divider for each throttle would be worth looking at. We ...

johu wrote: ↑Wed Mar 27, 2024 8:57 pmGood.

I have the schematic and board updated to V0.0.4. I still have to do the production files. See any issues with the pdf schematic attached?

It feels unsophisticated, but that's why I had a regulator in the original. It's not a bad thing, it can start getting busy, large, and costly. With the drv chip enable =\< input voltage & < ~5v it might be worth adding a logic gate IC & 5v regulator. It might simplify the whole thing. *Edi...

I simulated the + / - trigger part of the circuit, I believe it works as expected. The left 2 position switch flips between + & - triggered, this will be a 3 pad solder jumper. The right 2 position switch flips the enable to + or - to simulate a ground or +12v turn on. https://everycircuit.com/c...

A list of unresolved items: Sometimes the STM32 does not start up, probably hangs in boot loader - is down to reset timing of ESP32 - Are we just leaving the boot delay capacitor unpopulated? Might make sense to increase the boot delay time but unsure how long it needs for all use cases. Verify diff...

Is the board ready for another production run? Will order sometime next week, presumably Does that mean everything is running properly? I thought you were still working through some bugs. You mentioned trying the zener back in line between the address and brake output. It's that staying in? Edit, T...

If the "stick" or secundary voltage is the same why to simply use 555 timer and feed 2 voltages one 12 and one from the DC/DC? Small relais can do the magic. Maybe KISS method? If relays are used to swap between say 14vdc and 4vdc there will either be a 0v change over time or potentially ...