Hey everyone, looking for some feedback on a carrier board I’m designing for an Air Quality Monitoring project.
So for some context, I'll be manufacturing this myself via chemical etching. It is a single-sided board (bottom layer copper only). The red traces in the layout represent physical wire jumpers I will solder on top.
I previously designed, home-etched, and successfully tested a Wi-Fi-only version of this board (just the ESP32, SD card, and sensor). It works perfectly. This new revision is specifically to add a SIM7600E LTE module for remote telemetry, and I want to make sure I am handling the new power requirements correctly.
The Hardware:
- Brain: ESP32 Dev Module
- Telemetry: SIM7600E LTE Module (Designed to be physically removable).
- Sensor: SEN55 (I2C)
- Storage: MicroSD Card Module
- Power: 5V 3A DC Barrel Jack
Specific areas I’d love feedback on:
- Power Delivery: Since the SIM7600E is notorious for 2A spikes. I’ve added a 1000μF electrolytic cap near its header, and I have thickened the main power traces to around 1.25mm. Does the schematic/layout handle this adequately?
- General Gotchas: Any obvious schematic errors (UART pins, I2C logic levels) before I commit this to copper?
Attached are the current schematic and PCB layout. Thanks in advance for the help!