Zigbee Relay Control Design

flux

0:00

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:
- U2 LP38693MP-3.3/NOPB (3.3 V regulator)
- U3 ULN2003ADR2G (relay driver)
- X1 NX1612SA-32MHZ-STD-CIS-3 (32 MHz crystal)
- X2 ECS-.327-6-34QCS-TR (32.768 kHz crystal)
- ANT1 TI 2.4 GHz Inverted F Antenna
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.

135 days

Ready.

Reviews

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