I’ll design the solar-powered dashboard compass schematic from scratch: define the architecture, select library parts for the MCU/compass/display/power blocks, wire the circuit with required support passives, then run ERC review and fix issues before stopping at the schematic→layout checkpoint.
I selected the main architecture: solar input → LiPo charge/power path → 3.3 V regulator → low-power MCU, I2C magnetometer, TM1637 display driver, and three single-digit 7-segment displays. I’m checking the IC datasheets now so the support passives and wiring are grounded in the manufacturers’ circuits.
Working for 1 day 5 hrs...
Reading ATSAMD10C13A-SS datasheet for ATSAMD10C13A pin table power supply pins.
Read LIS3MDLTR datasheet for LIS3MDLTR pinout I2C application circuit.
Read MCP73871 datasheet for MCP73871 typical application circuit sol.
Read MCP1700T-3302E-TT datasheet for MCP1700T-3302E-TT pinout input output ca.
Read TM1637 datasheet for TM1637 pinout typical application circui.
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