Job
Independent PCB Design Review — CM4-based mixed-signal audio board (Gerber + netlist)
path
MIPI DSI display interface
I2S audio bus, I2C, USB, MIDI (TRS), and a matrix of RGB-backlit control pads
Designed in PADS; Gerbers available now, IPC-D-356 netlist to follow
What we need reviewed
Designer
judeb2
⭐⭐⭐⭐⭐Embedded Systems, PCB Design, Firmware Development, IoT, Low Power Design
strong expertise in high-speed PCB design, including PCIe and DDR4 routing, as well as precise impedance matching for reliable performance at high frequencies. I also specialize in RF and antenna design
Designer
younesa
Electronic Engineering professional with embedded C and PCD design experience
issues such as Reflation, termination, Controlled impedance, EMI, Crosstalk, Differential traces, Power distribution, High-frequency Losses lines, Short Wavelengths, Control trace temperatures Professional on
Job
IoT Environmental Sensor PCB Review – ESP32-S3 + Sequans GM02S 4G/LTE-M/NB-IoT + WiFi/BT
global roaming
Scope of work
Full schematic review
ESP32-S3 ↔ Sequans GM02S interface (UART, control signals, power-on sequencing, SIM interface)
Ethylene sensor 110-65x analog front-end, op-amp /
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