My projects plan.
- 12V wall wart + Arduino or Just MCU with custom PCB + WiFi + temp sensor + rain sensor + relay module + 12v cpu fan + etc...
- With non-flammable plasticbox contains my project devices.
- Using fuse for project
- Avoid direct working with AC or AC devices (AC only at wall wart plug).
If I want to use battery as my power source, Should I avoid using lithium ion battery ?