20251208 Spinner: Front Mandible PCB ver 03 Testing

20251208 Spinner: Front Mandible PCB ver 03 Testing

JLCPCB & being (almost) Perfect

I always liked to use JLCPCB which apart from their manufacturing speed, their Call Centres are very responsive when it came to troubleshooting my designs. However, I also wished that they could help modify my PCB and/ or 3D files too but sadly, that is not possible. I mean, if they did help and in the process, there are more errors or, an error came up, it would be very easy for the Client to blame them. The issue would drag on while creating a very lasting and bitter experience. Therefore, since it is my own design, I will have to check it thoroughly again. Going over or building a prototype board is irrelevant since these silly mistakes were due to unintentional trace overlapping or, components placed too close leading to shorting when being soldered. And the most embarrassing ones of all? Forgetting a trace or connecting them wrongly which leads to mis-labeling.

The issue of being perfect is very important when it comes to matters such as PCB manufacturing. This was drummed into me when I was in the Diary Printing Industry. And unless the Client or designated PIC signed off on the amendments, the printing job must never start despite their Company asking or shouting at us. This is because we’re not printing Diaries by tens or hundreds but thousands. One small mistake can multiply it by the thousands and the whole Job is compromised, worse, redo or cancelled.

20251208 Spinner: Front Mandible PCB ver 03 Testing
The PCBs arrived at 14 days, which is quite fast compared to a long time ago where the average shipping time could take almost 3 weeks. Then again, I am always very happy when I see the Blue packaging on my Table.

Testing the PCB

As soon as I got home, I fired up the soldering iron. But alas, it had to wait due to Family stuff and… Dinner. And discussions. And taking out the garbage. And finding some documents. And so on. It was not until almost two hours later that I got to take out the board and twelve necessary components to start my soldering. Ha ha. Most of the bulk work has been done, its only a matter of re-designing the Main Board again to give it less load, look into vac-forming, complete the prototype model and look into the Paragrafix PE sets, etc. And then the manual itself. But I can foresee the issue with the installation of the roof lighting where I’d have to choose between thick wiring or, inaccuracy of the model’s details.

This Project is taking so long, (I can’t even remember how long) so a few more years is not going to make any difference. But I hope to get it done before I cannot do it anymore.

The new PCBS more or less fits into the mandible parts. I did not remove the three circles as they kinda marked the available space in the plastic part.
The board was designed to be used on both sides of the mandibles. I only have to make sure I solder the different sides as both designs are literally identical.
With the specified thickness, the whole PCB almost sit flush into the plastic part. I can increase the thickness to another 0.2mm where I can then glue some plastic tabs as placeholders.
The SMD LEDs are bright and quite intense. The only disadvantage is that although it can produce a wider spread of light, the black PCB kind of absorbed most of it. I could do a white but this would mean compromising on price and also, thickness.
I suppose I could have relocated the SMD LEDs slightly back to the middle but this would mean modifying the upper area of the PCB for more maneuvering space. For the time being, during light blocking, as long as the two slits remain clear (and not cut away too), they can serve as diffusers to the hotspots.
When in Car mode, the part C is supposed to ‘move’ up. My worry was that the PCB will obstruct the whole assembly. Looking at the arrows, there is some gap which closes if you press harder. I did not as I find the two prongs quite fragile and can snap off in a accident.
So, I am not going to worry about the PCB blocking the assembly. If course there is a possibility that the PCB can be redesigned as a ring with the 5mm LED bent into position. But light-blocking that ring would be a nightmare.

As an afterthought, I should have twisted the SMD Resistors to follow the curvature of the circles so that they looked ‘functional’ as if its some kind of a mechanical system when you look at it in CAR MODE. But then again, searching the Internet, majority of the Spinner was always posed in Flight Mode.

The PCB Challenges (FPCB Stiffeners)

Looking back at the design, (OK, the first image at the top), I appreciated how it reminded and challenged my outdated belief years ago that a PCB board can only be in the form of either a circle, a rectangle or other straight-lined shape. Heck, when it comes to designing PCBs for Scale Models where every millimeter of space is a premium, the answer is so obvious! This Project taught me how to create a custom shaped PCB using opensource software such as InkScape. It allowed me to create the basic shape and fine-tune it and then exports it to EaglePCB7.7.0. There is another method where you can import it as a silhouette as basis for the Board. This is quite significant when it comes to a drawn symbol or logo.

The next step, I supposed would be to learn and use their specific software EasyEDA. Their reasoning is that this is the only PCB Software which could be used to design the FPCB Stiffeners. And after having a brief look at their tutorial, it seemed to be just another layer, which in theory, can be done with any PCB software including EaglePCB. Then again, I hate to rock the boat and is a good excuse to learn about this EasyEDA. Moreover, in the footnotes, it is possible to import the EaglePCB files into EasyEDA. Whoa…

Posted in A Piscean Works Blog, Blade Runner, Cars, Design, EaglePCB7.77, Electronics, Flowcode, Fujimi, JLCPCB, Lighting, Microchip PIC, Microcontroller, Model Kits, Printed Circuit Board, Programming, Scale Lighting, Scale Models, Sci-Fi, Spinner, Upgrade Parts.

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