Raspberry Pi GPIO Pinout
Select a pin or function to inspect the 40-pin header. GPIO uses 3.3 V logic and is not 5 V tolerant; verify the board model before wiring.
3.3 V GPIO is not 5 V tolerant.
A QUICK WALKTHROUGH
How to use this tool
- Choose a pin or function.
- Read physical and BCM labels and bus functions.
- Check voltage and current limits before wiring.
40-pin reference
Shows physical numbering, BCM names, power, ground and common I²C, SPI and UART functions.
Electrical warning
GPIO is 3.3 V logic and is not 5 V tolerant. Never connect 5 V directly to GPIO; use appropriate level shifting and check the board documentation.
GOOD TO KNOW
Common questions
Does this fit every Pi?
It targets the standard 40-pin header. Confirm the exact model and revision.
Can any pin power my circuit?
No. Power, ground and GPIO pins have different roles and limits.