Strange things happen. From looking at your pictures it's oriented 90° to how it would normally be, right?

What are the chances that an air pocket ends up stuck up top?

I'd be surprised if cool temps threw a limp mode.

I was going to only spend 30 min on it but got stuck in it. image.png Getting rid of the heatsink planes made a big difference. I was able to shift things around and tighten up the traces for frequency and pwm delay a lot. The ground plane is almost completely solid except for 1 duty cycle reference...

This is the simulation I was doing to find reasonable resistors for the gate as well as for testing the zener to protect the p mosfet. https://everycircuit.com/circuit/4697508156276736 The green trace there is watching VGS. There's a switch to swap between 12v & 24v. This runs at 25kHz. Its look...

I'm not sure why they assigned 4 part numbers, it's 2 variants with different assembly feed packaging...and screwed up pricing. $2.47 for the 1.5 amp version without a heatsink. $4.64 for the 3 amp heatsink version. The heatsink on the DRV103 is required to be separate from the ground plane. It look...

I’m having a problem where after a couple of miles the inverter slows me down to a crawl for a min or two and then I can accelerate hard again for another couple of miles. ideas anyone? Replying here to not clutter up the gen 3 development thread. Have you logged temps while driving & accelerat...

Finally got around to installing into the inverter (V0.0.3 board) and see here there might be some TMPHS issues. -R13 is a pull down resistor for the T_SINK input. This is at 3K3 in V0.0.1 but unsure if this is ideal. There are 2 plated thru holes on each side of R13 to use to make testing the idea...

Brake boosters are supposed to hold enough vacuum at least a few presses of the brake pedal to help you push the brake. If it kicks on every 2 minutes that means you have a leak and your pump likely won't last very long. Our your vacuum switch doesn't have much hysteresis. A reserve tank will lessen...

JLC just sent me an updated invoice for the DRV103H ICs I pre-ordered. They are about 3x the cost from what they were supposed to be. Screenshot_20240428_060450_Samsung Internet.jpg Screenshot_20240428_062950_Gmail.jpg I requested a quote for the 4 variants of this IC to be able to make a better inf...

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.