Is PDB actually mandatory for a 450 build? Or is the "Star Joint" method safe?
Hey everyone, I’m currently working on a project of mine for my masters, involving a 450mm Quad-X UAV (Pixhawk 2.4.8, A2212 1000KV motors, 30A ESCs).
I’m trying to keep the weight down and since I am a student the costs must be kept even lower. I was looking into buying a Power Distribution Board (PDB), but due to budget constraints i had to give up on that idea, and since i had no ine to guide me i had to use the help of AI Gemini (Thinking and Pro mode since they are better for Complex problems), and it suggested that I could skip the PDB entirely and use a "Star Joint" (or Star Solder) method instead.
For those who haven't heard it called that, the method described is:
Stripping the power and ground leads from all four ESCs and the main battery connector, twisting all the positives into one central "node" and all the negatives into another, and soldering them into two solid joints. These are then heavily insulated with heat shrink or liquid electrical tape, effectively creating a manual power loom without a PCB.
My questions for the experts here:
1.Is this actually reliable for a 450-size drone drawing ~40-50A at hover/punch-out?
- Aside from it being a bit "permanent" and harder to swap ESCs later, are there any major safety or interference risks I'm missing by not using a filtered PDB?
3.Has anyone here flown a "star-soldered" rig long-term?
I genuinely need your guys' help and i had to do what i had to do due to lack of resources, budget contraints and for those who dont know the hardware is insanely expensive here in my country. All I need is a working UAV at least. Just wanted to see if this is a standard "pro-tip" or a "you're going to crash" move.
Thanks in advance!