u/Classic-Direction930

Help a chud !!
▲ 2 r/PCB

Help a chud !!

Hey everyone,

(one of the versions are in images)

https://preview.redd.it/bufs4jlz45wg1.png?width=1515&format=png&auto=webp&s=35d369204f07203c9d6cc797e9b905b28c7c2f7d

https://preview.redd.it/9a5fuhkz45wg1.png?width=1519&format=png&auto=webp&s=42b1a92771d386bca117a6254385dfc91c7c36ca

https://preview.redd.it/tqqvlgkz45wg1.png?width=1510&format=png&auto=webp&s=eb0f0212a06ccfffe3d6e8f6a9795f0c624fa2c0

https://preview.redd.it/02ft2ikz45wg1.png?width=1528&format=png&auto=webp&s=e519e211d7b62be5cd80b3d8e03bae4f63caf87d

https://preview.redd.it/glqfvfkz45wg1.png?width=1519&format=png&auto=webp&s=7b59e3def26d0ef5b40437b883777c84b39b3427

https://preview.redd.it/xuotjhkz45wg1.png?width=1508&format=png&auto=webp&s=ac526bad039d0854d44d01904282f2849d911f32

https://preview.redd.it/8krl2ei055wg1.png?width=552&format=png&auto=webp&s=5f058ad3ed2f56219137d29e9d3ba6c0a79d3b4f

I’m 16 and I’ve been working on a custom flight computer/avionics suite called VISER. It’s grown from a simple project into a 3-board system, and honestly, I think I’ve reached the point where things are going over my head.

I’ve finished the schematics and a preliminary layout, but I’m terrified of sending these to fab and having them "magic smoke" or fail mid-flight because of a fundamental mistake in my power planes or RF routing.

Where I’m stuck: I’ve done my best with the datasheets, but checking the high-speed traces, the switching regulator layout, and the shared I2C/SPI buses between two MCUs is starting to feel overwhelming. I’m worried about noise, EMI, and potential ground loops between the boards. Or i just suck at it tbh

Request: Would any experienced EE or PCB designer be willing to let me send them my KiCad files (or a GitHub repo link) for a proper "red-line" review?

I’ve attached screenshots of the current progress, but I know a screenshot only shows 10% of the story. I really want to learn the right way to do this before I spend my savings on the components and assembly.

I’d appreciate any mentorship or even just a "this looks okay/this is a disaster" check.AND FOR ONCE SAY U ARE GOOD TO GO AND THIS WILL WORK Thanks!

reddit.com
u/Classic-Direction930 — 2 days ago

overwhelmed by my 1st major Avionics Build . Would anyone be willing to do a deep-dive file review?

Hey everyone,

I’m 16 and I’ve been working on a custom flight computer/avionics suite called VISER. It’s grown from a simple project into a 3-board system, and honestly, I think I’ve reached the point where things are going over my head.

I’ve finished the schematics and a preliminary layout, but I’m terrified of sending these to fab and having them "magic smoke" or fail mid-flight because of a fundamental mistake in my power planes or RF routing.

Where I’m stuck: I’ve done my best with the datasheets, but checking the high-speed traces, the switching regulator layout, and the shared I2C/SPI buses between two MCUs is starting to feel overwhelming. I’m worried about noise, EMI, and potential ground loops between the boards. Or i just suck at it tbh

Request: Would any experienced EE or PCB designer be willing to let me send them my KiCad files (or a GitHub repo link) for a proper "red-line" review?

I’ve attached screenshots of the current progress, but I know a screenshot only shows 10% of the story. I really want to learn the right way to do this before I spend my savings on the components and assembly.

I’d appreciate any mentorship or even just a "this looks okay/this is a disaster" check.AND FOR ONCE SAY U ARE GOOD TO GO AND THIS WILL WORK Thanks!

reddit.com
u/Classic-Direction930 — 2 days ago
▲ 2 r/PCB

[Review Request] General Purpose Avionics / Flight Computer

Hey everyone! I’m working on a General Purpose Avionics board (VISER) for high-powered rocketry/robotics and would love some feedback on the schematics and layout before I send it to fab.

Project Goals:

  • Main MCU: ESP32-S3-MINI-1U (Handling high-level logic, SD logging, and WiFi/BT).
  • IO Extender: STM32G031C6Tx (Managing PWM outputs and real-time IO to offload the ESP32).
  • Comms: SX1280 (2.4GHz LoRa) for long-range telemetry.
  • Sensors: BMI088 (IMU), BMP390 (Baro), MMC5983MA (Mag), and a MAX-M10S GPS.
  • Power: 6V–16V input, 5.12V/4A Buck for servos/peripherals, and a 3.3V/1A LDO for logic.

Specific Areas for Feedback:

  1. Buck Converter: I’m using the TPS564257 for a 5.12V rail. Does the inductor choice and layout (see PCB image) look okay for high-vibration environments?
  2. Radio Path: First time using the SX1280 and a dedicated 2.4GHz front-end filter. Any concerns with the RF path or grounding?
  3. IO Extender Bridge: Using I2C/SPI between the ESP32 and STM32. Are the pull-ups (2.2k) sufficient, or should I tighten them for high-speed comms?
  4. PCB Layout: I've attempted to keep the power electronics at the bottom and the RF/Sensors at the top to minimize noise. Is the grounding strategy for the buck converter isolated enough?

Schematics Attached:

  1. Power Distribution (Reverse protection + Buck)
  2. GPS & Comms (SX1280 + M10S)
  3. Sensor Suite (IMU, Baro, Mag)
  4. Secondary MCU (STM32G0)
  5. Main MCU (ESP32-S3)
  6. IO & USB-C
  7. PCB Layout Preview

Thanks in advance!

https://preview.redd.it/9a8wp0q9b2wg1.png?width=1515&format=png&auto=webp&s=60fa8cfa8373e884ca66bea16dfda7c93f96b991

https://preview.redd.it/qtg0jyp9b2wg1.png?width=1519&format=png&auto=webp&s=d53831de137c16787952c23e45f16622d814fea6

https://preview.redd.it/k3vszxp9b2wg1.png?width=1510&format=png&auto=webp&s=f78890f3a6b29354dc1ed71ac954d73fb3177a26

https://preview.redd.it/yzgruxp9b2wg1.png?width=1528&format=png&auto=webp&s=ce9af4b43adae971cb3adc347cee6e869c05f7ef

https://preview.redd.it/r96l3yp9b2wg1.png?width=1519&format=png&auto=webp&s=e9f5d95b46427b9d86d9ab826ea93034857c4ecd

https://preview.redd.it/iv9ybgs9b2wg1.png?width=1508&format=png&auto=webp&s=2c54e41a658b20c2a84327c8b727b3de7b593a7b

https://preview.redd.it/pqwyejhab2wg1.png?width=552&format=png&auto=webp&s=bc8dfd2df80632723df81d533d99573bebbda6eb

reddit.com
u/Classic-Direction930 — 3 days ago
▲ 0 r/PCB

Holy help me !!! :(

So, I kind of messed up my last PCB design. I got it printed and assembled it, and while it worked, it performed poorly. I was thinking you could review all of this before I put another 20 hours into making a new design. The rest is ChatGPT-refined stuff soo yeah bye human me lol :

The airframe is a 74mm OD tube, and I'm designing the PCB in KiCad to fit a 60mm wide internal sled. Here is the finalized BOM I'm taking into production.

The Brain

  • MCU: Teensy 4.1 (600MHz, Dual-Precision FPU for GNC math).
  • Storage: Onboard SD for high-frequency logging + W25Q128 Flash chip.

Power & Protection

  • Regulator: LM1117-3.3V (SOT-223) – Drops 3S LiPo to logic level.
  • Polarity Protection: 1N4007 Diode (Reverse battery protection).
  • Filtering: 10uF & 0.1uF Ceramic Caps (Mandatory for filtering servo noise).
  • Battery Monitoring: Voltage Divider (100kΩ / 10kΩ) to track 12V rail health.

Sensor Suite (I2C Bus)

  • IMU: BNO055 Breakout (Absolute orientation/Quaternions).
  • Altimeter: BMP388 (High-precision apogee detection).
  • Bus Stability: 2.2kΩ Pull-up resistors on SDA/SCL (Essential for 400kHz+ speeds).

Recovery & Pyros

  • Deployment: 3x IRLZ44N Logic-Level MOSFETs (Dual deployment + Ignition).
  • Gate Logic: 150Ω series resistors (Current limit) + 10kΩ pull-downs (Safety/anti-float).

Interface & Feedback

  • Audible: 3V Active Buzzer driven by a 2N2222 Transistor.
  • Visual: RGB LED (Common Cathode) with 220Ω current-limiting resistors.
reddit.com
u/Classic-Direction930 — 4 days ago

Jazz chud into cornell?

I’m a 16-year-old applicant targeting Cornell Engineering (Dream School). I have a massive spike in robotics and social entrepreneurship, but a significant medical dip in 11th grade. I’d love an honest evaluation of my profile.I am spike kid like i am best at building stuff than anyone else in my school i can bet for that

​Stats & Context

​SAT: 1500+ (Predicted) current :1400

​9th Grade: 90%

​10th Grade: 90%

​11th Grade: 60% (The Dip: Diagnosed with severe Typhoid during finals. I'll be explaining this in the "Additional Information" section)

​12th Grade: 90% (Mid-term predicted)

​Additional Circumstances: Commute 120+ minutes daily

​Extracurricular Activities (ECs)

​Captain & Lead Innovator, Technoxian World Robotics Championship: Led team to win the 2024 World Championship; secured a 60,000R innovation grant for scalable engineering.

​Founder & Product Lead, VISER (Startup): Developed an AI-powered social platform. Scaled to a 10,000+ user waitlist through product-led outreach and minimalist design.

​Founder & Lead Engineer, Assistive Engineering & Robotics Org: Built a computer for blind users and mind-controlled bionics. Authored a 100+ page research paper certified by the AICB; impacted 300+ individuals.

​Vice Head Boy / IT Club Captain, DPSG: Elected leader for 7 years in a school of 7,000+. Directed IT teams to multiple regional and national tech wins.

​Founder & System Architect, Ayogtree: Created a sensor-based anti-tree smuggling system with real-time app alerts. Recognized by India’s National Environment Ministry.

​Winner, Student Innovator, Vigyantram IIT Bombay: Developed a smart helmet for industrial safety; took 2nd place at IIT Bombay’s national innovation competition.

​Independent Aerospace Engineer: Self-directed rocketry project. Designed, fabricated, and launched a small-scale rocket with full post-flight failure analysis.

​Hackathon Winner & Developer: Top finisher in multiple state-level hackathons; led teams in rapid software prototyping.

​Awards & Honors

​World Champion — Technoxian World Robotics 2024.

​2nd Place National — IIT Bombay Innovation Challenge.

​National Ministry Recognition — For environmental tech (Ayogtree).

​AICB Certified Researcher — For assistive technology and blind-user computing.

​Essay Ratings

​Personal Statement (9.5/10): "The Jazz Engineer." Explores the intersection of engineering and music (trumpet), focusing on how "wrong notes" lead to better improvisation and pivoting from "building for judges" to "building for impact."

​Cornell Supps (8/10): Focused on the collaborative "Any Person, Any Study" culture and specific robotics labs.

​Published Work

​Author: Published a 50-page book titled "Killer Files" (Non-fiction/Investigation).

​What are my chances?

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u/Classic-Direction930 — 5 days ago

Is this flight computer good ?

So this is a Open source flight computer i was hoping if i could use it for my TVC rocket

I have my own pcb design too but its just soo beginner it works but i dont know if it can handle the real flight

below is what i am planning to use open source computer

https://preview.redd.it/c9v17avzravg1.png?width=743&format=png&auto=webp&s=0087a81863aee86724e67b274123b09a34fb165e

Components i would use in both of my PCB almost same design and sensors

will this thereby stand the telematery and other things data logging and blah blah

Teensy 4.1

BMP388

MPU6050

5050 SMD LED

5* 1 OHM resistors

3* 470 OHM resistors

1* 40 OHM resistor

1* 10 uF capacitor

1* 1 uF capacitor

4* terminal blocks

3* N Channel Mosfets

SMD slide switch

Buzzer

reddit.com
u/Classic-Direction930 — 7 days ago