Zigbee Relay Control Design
Thought
Work done
- Updated project description to reflect “STM32WB55 Zigbee FFD Controller with Dual 5 V Relay Drivers, Power Regulation, and Complete RF Chain”
- Added System Architecture property with block-diagram
- Placed all major ICs and RF components:
- Inserted ferrite bead for rail isolation: FB1
Tasks remaining
- Add decoupling capacitors (100 nF) near each MCU VDD pin and a 10 µF bulk cap at the LDO output
- Add pull-up/pull-down resistors on NRST/BOOT0 and series resistors on ULN2003A inputs
- Place 5 V input and relay COM/NO/NC terminal blocks
- Make all net connections (power rails, MCU ↔ driver, crystals, antenna matching)
- Run ERC/DRC checks to validate the schematic
Success criteria review
- ✅ 5 V rail, ferrite bead and 3.3 V regulator added
- ⚠️ Decoupling, bulk caps and protection resistors not yet placed
- ⚠️ Relay drivers added, but flyback paths and connectors are missing
- ⚠️ RF crystals and antenna footprint placed; load components and routing remain
- ⚠️ Not yet ready for ERC/DRC
Next step
Add the required passive components (decoupling/bulk capacitors and resistors) to complete the power and protection subsystems.
Flux stopped
