I designed a PCB for my ESP01 project for home automation. I have them manufactured and tested and they work successfully with no issues so far. But I would like to share it with you to get your advice for optimization in terms of safety, efficiency and size. or whatever.
I considered in the design two type of relays SLA-5VDC-SL-A & SRD-05VDC-SL-C so I can chose based on application needs.
- WX-DC12003 for voltage step down
- LD1117V33 TO220 for regulating voltage 5V-3.3V
- 2N2222 transistor
- 1N4148 diode
- 2 Resistor slots
- 3.5mm Thick tracks for 15A with 30 degC increase.