Logical pinout · physical placement not verified

3V3Raspberry Pi GPIO physical pin 1 / 17
Raspberry Pi HAT 3.3V power rail; Pinout.xyz says Touch pHAT needs 3v3 power.
Type · PowerVoltage · 3.3V
5VRaspberry Pi GPIO physical pin 2 / 4
Raspberry Pi HAT 5V power rail; Pinout.xyz says Touch pHAT needs 5v power.
Type · PowerVoltage · 5V
GNDRaspberry Pi GPIO ground pins, including physical pin 6
Raspberry Pi HAT ground reference on the 40-pin header.
Type · GroundVoltage · 0V
GPIO2SDARaspberry Pi GPIO physical pin 3
I2C data line; Pinout.xyz lists communication over I2C and Raspberry Pi GPIO 2 as I2C1 SDA.
Type · GPIO, I2CVoltage · 3.3V logic
GPIO3SCLRaspberry Pi GPIO physical pin 5
I2C clock line; Pinout.xyz lists communication over I2C and Raspberry Pi GPIO 3 as I2C1 SCL.
Type · GPIO, I2CVoltage · 3.3V logic
CAP1166 I2C address 0x2cOn-board I2C device, not a separate external header pin
Touch pHAT uses the CAP1166 capacitive touch and LED driver at I2C address 0x2c according to Pinout.xyz.
Type · UnknownVoltage · 3.3V I2C logic

Pin	Position	Type	Function	Voltage
3V3	Raspberry Pi GPIO physical pin 1 / 17	Power	Raspberry Pi HAT 3.3V power rail; Pinout.xyz says Touch pHAT needs 3v3 power.	3.3V
5V	Raspberry Pi GPIO physical pin 2 / 4	Power	Raspberry Pi HAT 5V power rail; Pinout.xyz says Touch pHAT needs 5v power.	5V
GND	Raspberry Pi GPIO ground pins, including physical pin 6	Ground	Raspberry Pi HAT ground reference on the 40-pin header.	0V
GPIO2SDA	Raspberry Pi GPIO physical pin 3	GPIO, I2C	I2C data line; Pinout.xyz lists communication over I2C and Raspberry Pi GPIO 2 as I2C1 SDA.	3.3V logic
GPIO3SCL	Raspberry Pi GPIO physical pin 5	GPIO, I2C	I2C clock line; Pinout.xyz lists communication over I2C and Raspberry Pi GPIO 3 as I2C1 SCL.	3.3V logic
CAP1166 I2C address 0x2c	On-board I2C device, not a separate external header pin	Unknown	Touch pHAT uses the CAP1166 capacitive touch and LED driver at I2C address 0x2c according to Pinout.xyz.	3.3V I2C logic

Logical pinout · physical placement not verified

Pin details

6 connections

3V3
Raspberry Pi HAT 3.3V power rail; Pinout.xyz says Touch pHAT needs 3v3 power.
PowerVoltage · 3.3V
Raspberry Pi GPIO physical pin 1 / 17
5V
Raspberry Pi HAT 5V power rail; Pinout.xyz says Touch pHAT needs 5v power.
PowerVoltage · 5V
Raspberry Pi GPIO physical pin 2 / 4
GND
Raspberry Pi HAT ground reference on the 40-pin header.
GroundVoltage · 0V
Raspberry Pi GPIO ground pins, including physical pin 6
GPIO2SDA
I2C data line; Pinout.xyz lists communication over I2C and Raspberry Pi GPIO 2 as I2C1 SDA.
GPIO, I2CVoltage · 3.3V logic
Raspberry Pi GPIO physical pin 3
GPIO3SCL
I2C clock line; Pinout.xyz lists communication over I2C and Raspberry Pi GPIO 3 as I2C1 SCL.
GPIO, I2CVoltage · 3.3V logic
Raspberry Pi GPIO physical pin 5
CAP1166 I2C address 0x2c
Touch pHAT uses the CAP1166 capacitive touch and LED driver at I2C address 0x2c according to Pinout.xyz.
UnknownVoltage · 3.3V I2C logic
On-board I2C device, not a separate external header pin

Start wiring

Shield

Confirm the data interface matches your host board.

Module pins: 3V3, 5V, GND, SDA / GPIO2, SCL / GPIO3. Schematik maps them to your board in the app.

Add-ons

269 other options

About 270 add-ons across Pi HATs, Arduino shields, and FeatherWings. The same function — motor control, PoE, display — usually ships once per host connector family. Get the host board right first.

View all 269

Related groups

4 groups

Arduino

About 75 boards across every Arduino generation: 5V Uno/Mega/GIGA, 3.3V MKR and Portenta, plus DFRduino and Bluno compatibles. Confirm the voltage rail before stacking any shield.

Boards · Arduino boards · 77 parts

ESP32

Wi-Fi and Bluetooth on a single chip, in every shape from Espressif DevKitC to Adafruit Feathers with STEMMA QT, DFRobot FireBeetles tuned for battery life, and Seeed XIAOs under a thumbnail.

Boards · ESP32 boards · 159 parts

Other MCUs

Specialists: Teensy for high-clock audio and USB, Adafruit SAMD boards running CircuitPython or the Arduino IDE, proper STM32 eval kits, and the micro:bit classroom ecosystem. Schematik builds target ESP32, Arduino Uno, and Pico; come here when you have a specific reason to.

Boards · Other MCU boards · 229 parts

Pi Pico

The Raspberry Pi MCU line — Pico, Pico 2, and third-party boards on the same silicon — plus a deep bench of Pico-pinout displays, loggers, and radio modules that do nothing without a Pico plugged in.

Boards · Pico & RP2040 boards · 43 parts