6/16/2026 Extrava (DevLog 2)
Update
After talking to an electrical engineer through our network, I have fixed some issues in the PCB design that have been flagged. I made sure the decoupling caps are as close as possible and also made some rerouting for more organized tracing. Another issue that was brought up was why a 2-layer board. Had we used a 4-layer board that consisted of 2 signals, 1 power, and 1 ground plane, we would have an easier time routing the traces and isolating the analog component to ensure parasitic noise doesn’t affect it. But since this is not a high-frequency board, I guess for the bare minimum, a 2-layer board can do for now. We are still currently in the validation stage. However, my teammate has already bought some of the parts that we need, and I am now waiting for the review process to finish and the parts to arrive to begin assembly.
6/10/2026 Extrava (DevLog 1)
Extrava is a hardware implementation that detects extravasation. Extravasation is caused by leakage of medicine or fluids from sources such as IVs. I am not alone on this project. In my team, I am the engineering lead that is responsible for the hardware + the system architecture of the project.
Update
Finished the schematics, layout, and cad design. Also updated the BOM so my teammates know what to buy.
Todos
- Tackle the firmware, especially the firmware regarding the AD5941 bio-impedance sensor we are using
- Wait, wait until the parts come
6/4/26 IamAerial (DevLog 2)
I had 2 sessions today: one 2 hours and ~30 mins that I stupidly did not record on lapse (did not click the record button), and one 2 hours and ~51 mins that I recorded. Today’s total time came out to be over 5 hours.
Hopefully, that explains why my progress was this fast (for me who is a beginner).
Update
Updated my BOM, changed some parts such as the motors, and changed suppliers for cheaper parts. I started on the schematics and have already wired the USB-C receptacle, IMU, barometer, and some basic stuff for my STM32 MCU. Yes, I did take time to understand the fundamentals such as I2C vs SPI, and took time to read datasheets while referencing an outdated schematics with similar parts to mine from Reddit.
Next Todos
- continue on schematic: buck reg, ldo, etc.
6/3/26 IamAerial (DevLog 1)
I didn’t write a devlog yesterday, so here I am writing for yesterday. Project still in research phase.
About
I have no PCB experience, but I want to make a drone that can be controlled with your index finger. Well you can guess how much I will suffer this coming summer.
Update
I spent these 4 hours broadly architecting the system: how different parts of my system will interact with each other. Since I am doing this project to learn more about PCB design and electronics, I will be designing and building the flight controller, index transceiver/controller, and 4 ESCs from scratch. I have already researched the parts and made a half-finished BOM. Hopefully, my Physics C E&M knowledge can come in clutch. 🙏
Next Todos
- finalizing components
- start schematics
