12/29/2025 12 AM - Researched Parts

Did some research on the parts that i am going to use. Planning on using HobbyStar 3650 V2 4-Pole Waterproof Brushless Sensorless Motors and some 60A ESC's along with a digital metal gear servo ~20kg.

12/29/2025 2 PM - Started Schematic & BOM

Working on the Schematic as well as the bill of materials. Decided to use the OV2640 Camera module with a dedicated fpc connector onboard the pcb. Decided to use Active Aero with Dual SG90 servos in the back as well as having essentially a "two power stream" layout with one side being logic/servos and the other side being the high current circuit with the motor

12/29/2025 4 PM - Finished the schematic

Finished the schematic for the logic/servo pcb. Ran through DRC, fixed some issues regarding floating pins without the NC flag, and redid and got no errors! Next step is the layout on the pcb itself and maybe some decoupling caps. Also updated the BOM cause i need a charger and realized that i can save about $10 . We are kind of at $63 already, and that is not including the costs for the PCB or the 3d Printed chassis.

12/29/2025 5 PM - Routing the PCB Part 1

Decided to journal mid-routing-the-24pin-connector. Taking me quite a while because the BAT+ and 5V lines have to be extra thick due to the high current draw from the servos. Anyways did that, now probably the most tedious/hardest part is upon me, routing the data lines for the camera module. They have to be length matched because otherwise i will get bad quality footage, all 8 lines


Looked at pricing for the PCB/ Parts as well and its pretty expensive but that was expected. Bit over $97 with tax now.

12/29/2025 8 PM - Finished the PCB

Done with the routing, took extra consideration for the PCLK and Data lines for the camera with length matching. done with the general routing as well, making sure that the ground pour is especially thick along the BAT- to Servos Route because that is where most of the current will travel through, next step is the CAD!

12/30/2025 12 PM - Started work on the front wing & planned the general model

Got the type of car I want to make/ the body style.
Going the hypercar route would be 100% fitting for this project as it is designed for highspeed applications. This would in turn be a lot more demanding hoever because it would make the cad design a lot more complex. That as well as the fact that the transmision and stuff would have to be hidden in a relatively space constrained place would make this much harder to accomplish. Planning to start off with the front/rear wing, and then doing the transmission/functional part, and then the overlay body. Planning a full jet black color and a sleek body. As i stated before, i think it would be MUCH easier to do a base-functional part and then overlay a sleek hypercar "body" on top of that, for the sake of removal and assembly as well as weight and also complexity. Here is the front wing btw:

12/30/2025 3 PM - Finished the front wing

Added these "hook" things so that it looks good when attaching to the main body, like the volkswagen I.D.R type thing.

Also sloped the front part to make it look more "agressive" and for the purposes that a front splitter serves. I did 2 versions, one where the split is at the bottom and one where the split is at the top

12/30/2025 4 PM - Working on the rear wing

Worked on the rear wing, going with a inverted airfoil design (for extra downforce) combined with chevrons, and a rear arm (acc 2, one from the canopy -> rear wing area and one from the servo spline -> the rear wing). This really will highlight the hypercar style design, and draws elements from both the cadilac le mans car and the volkswagen idr. I am done with the actual rear wing part and most of the extending arm part, just need to do arm #2 (one from the rear wing's top to the servo spline, this will be a similar style as the arm from the front wing). Also planning on doing a "battery underneath the pcb canopy" idea where the pcb is in the canopy area (also easy access to the servos through the rear arms) so that the pcb is like in the center of the whole car. Need to think more about esc placement tho bc this esc is quite big.

12/30/2025 7 PM - Finished the rear wing

Decided on a hybrid between the volkswagen IDR and the cadilac. It looks great imo rn, I wanted a slender main arm and a idr style connecting arm for the rear wing. the hole you see and the reason the conencting arm has a hole in the EXACT place it should be is because that is the exact spot where the sg90 has its spline. Took me some time because i had to do the exact measurements for the servo and because I wanted to make it look clean. Here it is!

12/30/2025 10 PM - Transmission/Power Part 1

Took HELLA long for not much progress. The main issue was the "How TF do I do the motor - rear axel" part because the motor is going to spin at 20000rpm. I explored a LOT of solutions, involving belt drives with heatset insert friction clamps, direct single gear staging and much much more. FINNALLY settled on a 2 stage 1:6 step down, and then the next problem occurred... if I 3d print the rear axel the torsion forces will rip the rear axel INSTANTLY, so I had to bite the bullet and decided to just use a steel rear axel, 5mm wide. Ts took so much time bc ive never done this before, this is like my second project ever in fusion 360 (did tinkercad before that) so ive never worked with gears or joints for that matter. This is honestly only step on tho, bc i still have to integrate the bearings and whole rear axel part as well as design the "socket" for the motor as well as do the steering as well as do the positioning allocations for the pcb, esc, and battery. Even after that i still have to do the final assembly. Ts is lwk more complex than i thought

12/31/2025 12 AM - Transmission/Power Part 2

I am essentially done with the whole transmission part. It looks pretty unordered right now but it has every 3d printed part modelled, the motor "socket", the axel holder with the bearing slots, the "Adapter" so that the 5mm axle , and the the "stage 2" gears and gear holder. All this will be modeled in the actual assembly part!

12/31/2025 6 PM - Finished the Wheels

took HELLA time because again ive never done this. Decided on TPU-Wheels with a 12 spoke design for the rim and a 34mm width (30mm front wheels), hybrid-between-airless-and-pressurized tire design. This design means that at 40-mph (the goal max speed), the 18 rib pieces inside the tire will help maintain structural integrity. Specifically the s-shaped ribs will also help with "springiness", keeping the ride smooth as well. This combined with the enclosed "air chambers" that take place between each rib, means that these tires will be perfectly suited for the high speed applications that it will serve. Also, I have a decently large rear wing so the reinforced pneumatic-cell tire design will hold up greatly to the centrifugal and down forces. This took a lot of time to develop tho bc this is my first expirience designing wheels at all

1/1/2026 - Starting on the steering system (edited rims as well)

Had to edit the front rims because of the fact that the front rims need to have bearings inside them for propper steering. This took some time because of the fact that the rim geometries are all sorts screwed up and also i started with the wrong rim :(. Anyways, for the steering system i researched a lot and am still deciding between normal (parallel) steering or Ackerman steering. Ackerman is frankly better but is also a bit more complex and might serve to be another breakpoint for the system. Parallel steering is a little less smooth as it turns the wheels the exact same amount so that might lead to understeer which i don't want. Will decide soon, both are def hella complex tho, probably one of the hardest cad pieces of this projects. For me essentially there are 3 "challenges" when it comes to this project:

Challenge 1: Power & gearing for the motor - Done
Challenge 2: Steering system - Currently on that
Challenge 3: Chassis and Stuffing everything into a sleek, hypercar looking shell.
With ofc the final challenge being making an "Assembled" cad model

1/3/2026 1 AM - Worked on and essentially done with the steering system

Did the steering system and did like 4 different itterations, 2 of them with "fixed" linkage bars. Settled on almost a steer by wire type thing where instead of mechanical linkage bars, I am using steel cables (~1mm diameter) to connect the steering apparatus to the servos. This steel wire linkage system will enable me to have a significantly stronger steering system and one that is lighter and is easier to repair as well.

1/3/2026 12 PM - Did the baseplate and chassis

As the title says, I finished the baseplate and "chassis", next I just need to make the top "cover" layer, add in the front and rear wings to that, and do the assembled look!

1/3/2026 2 PM - Prepping shell design and assembly

Everything looks pretty good thus far... lets see how that goes tho. Rear wing assembly looks stunning, def one of the most unique parts of this project. Will do the rims, tires, transmission, and the steering assembly next and then design a shell. After that we will get a pretty good "outer assembled" look and after that i will move onto the assembly for the inner pieces!

1/3/2026 6 PM - Assembled

Did the whole assembly for the parts themselves, next I just need to add a shell and then add in the cad models for the pcb and stuff! Spent hella time because i decided that I wanted a 10mm ride height and the gears were cooked to align and stuff. Looks hella amazing tho! Need a slick design to pair with this tho!

1/4/2026 1:06 PM - Making the shell

Taking FOREVER and still looking horrible, idk this is really hard to do in fusion 360, I am honestly going to try to redo this and approach it from a different angle because right now, it is VERY cooked. I have been trying for arround 2 hours over 2 days and DYING because of the tedious nature of ts. Will try again... have to try again...

1/4/2026 1:50 PM - Working on steering cutouts in the base plate

Spent some time making cutouts for the front wheels in the base plate to allow for steering. Right now it is at about 35 degrees of turning with the inner part of the wheel being able to hit closer to 40 to account for ackerman steering in the future (maybe by changing the lengths of the cables?)

1/4/2026 4 PM - Worked on and almost finished with the outer body

Almost finished with the outer body, took HELLA time and had like 14 different revisions to get here. Going with an open rear design so that the gears and the motor are cooled as well as so that the esc, with it's fan has "open air". Need to just make it like a "shell", add the holes to attach it to the main plate, add cutouts for a camera, antena and the servo cables and then I should be done! Im lowk so tired rn so i will hop off for now, will restart in like 3 hours and submit for review

by tonight!

1/4/2026 11 PM - Finished up pretty much everything

Did the screw mounting holes, finished the shell with some much needed improvements such as the width of the walls on the "canopy" part. Did the slicing as well as cleaned up everything and put it into a .step file for printing (minus the wheels and rims because the wheels are gonna be tpu). Beyond that, I also fixed up a front wing allignment issue, did a better job for the "assebembly" file with labels for the internal electronics and making 2 displays, with and without the top part! Oh yea also its gonna be about 1.3- 14kg total T-T

1/5/2026 - Prepping for submission

Made the GH repo, finished the BOM with every single part for the pcb, verified the pricings, made the readme, took all the required screenshots for the carts and did everything else in preparation for submission!