3.3V GPIO
Pico 2 W GPIO is 3.3V. Do not feed 5V signals into GPIO pins.
Safety Center
ObsoleteHQ keeps hardware learning low-voltage, clear, and beginner-safe without making it scary.
Motors and pumps
Do not power motors, pumps, or relays directly from GPIO. Use drivers and external power.
Relays
Beginner relay projects stay low-voltage DC only.
Lasers and flame sensors
Use eye safety for lasers and never create unsafe fire activities.
Water and batteries
Keep water controlled and treat LiPo charging as careful supervised work.
Responsible sharing
Use display names and avoid personal details in public project text.
Published safety cards
Heartbeat sensor is educational
Heartbeat modules are not medical devices.
Laser eye safety
Never point a laser module at eyes or reflective surfaces.
LiPo charging caution
Battery charging needs careful setup and supervision.
Low-voltage relays only
Beginner relay projects stay low-voltage DC only.
Motors need drivers
Do not power motors, pumps, or relays directly from GPIO pins.
Pico GPIO is 3.3V
Do not feed 5V signals into Raspberry Pi Pico 2 W GPIO pins.