I’m blocked from updating the schematic right now because execution credits are unavailable, so I can’t make tool-driven schematic changes in the project.
Current project state from this session:
Components were added, including ESP32-WROOM-32E, MPU-6050, AO3400A ×4, TP4056, CP2102N, USB-C connector, JST connectors, LED, buzzer, 2N3904, AMS1117-3.3, passives, test pads, and mounting holes.
U9 AMS1117-3.3 was added.
Some initial power connections were started:
TP4056 output to AMS1117 VIN/GND
AMS1117 VOUT to 3V3
USB-C VBUS/GND partially connected
Full schematic wiring is not yet complete.
Remaining schematic wiring to finish:
Complete VBUS, VBAT, 3V3, and GND net wiring.
Wire all four AO3400A motor drivers with 100 Ω gate resistors and 100 kΩ pulldowns.
Connect motor connectors: motor + to VBAT, motor − to MOSFET drains.
Connect MPU6050 I²C: SDA to GPIO21, SCL to GPIO22, both with 4.7 kΩ pull-ups to 3V3.
Connect CP2102N UART: TXD to ESP32 RX0, RXD to ESP32 TX0.
Add CP2102N auto-boot: DTR through 100 nF to EN, RTS through 100 nF to GPIO0.
Wire LED in sink configuration: 3V3 → 330 Ω → LED anode, LED cathode → GPIO13.
Wire buzzer from 3V3 through buzzer to Q5 collector, Q5 emitter to GND, GPIO32 through 1 kΩ to Q5 base, plus 100 kΩ base pulldown.
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
General Purpose Thick Film Standard Power
and High-Power Chip Resistor
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film
Features:
- RMCF – standard power ratings
- RMCP – high power ratings
- Nickel barrier terminations standard
- Power derating from 100% at 70ºC to zero at +155ºC
- RoHS compliant, REACH compliant, and halogen free
- AEC-Q200 compliant