Logical pinout · physical placement not verified

VIN
Power input for the NeoTrellis board, shown in the Adafruit NeoTrellis guide wiring table as VIN.
Type · Power
GND
Ground reference for the NeoTrellis board, shown in the Adafruit guide wiring table as GND.
Type · Ground
SDA
I2C data connection. The Adafruit guide maps SDA to I2C data.
Type · I2C
SCL
I2C clock connection. The Adafruit guide maps SCL to I2C clock.
Type · I2C
INT
Optional interrupt output. The Adafruit guide says INT can connect to a digital pin on the host microcontroller.
Type · Signal
A0
I2C address solder jumper. The guide says address jumpers hard-code unique addresses for tiled boards.
Type · Analog
A1
I2C address solder jumper. The guide says address jumpers hard-code unique addresses for tiled boards.
Type · Analog
A2
I2C address solder jumper. The guide says address jumpers hard-code unique addresses for tiled boards.
Type · Analog
A3
I2C address solder jumper. The guide says address jumpers hard-code unique addresses for tiled boards.
Type · Analog
A4
I2C address solder jumper. The guide says five address pins can change the seesaw I2C address.
Type · Analog

Pin	Type	Function
VIN	Power	Power input for the NeoTrellis board, shown in the Adafruit NeoTrellis guide wiring table as VIN.
GND	Ground	Ground reference for the NeoTrellis board, shown in the Adafruit guide wiring table as GND.
SDA	I2C	I2C data connection. The Adafruit guide maps SDA to I2C data.
SCL	I2C	I2C clock connection. The Adafruit guide maps SCL to I2C clock.
INT	Signal	Optional interrupt output. The Adafruit guide says INT can connect to a digital pin on the host microcontroller.
A0	Analog	I2C address solder jumper. The guide says address jumpers hard-code unique addresses for tiled boards.
A1	Analog	I2C address solder jumper. The guide says address jumpers hard-code unique addresses for tiled boards.
A2	Analog	I2C address solder jumper. The guide says address jumpers hard-code unique addresses for tiled boards.
A3	Analog	I2C address solder jumper. The guide says address jumpers hard-code unique addresses for tiled boards.
A4	Analog	I2C address solder jumper. The guide says five address pins can change the seesaw I2C address.

Logical pinout · physical placement not verified

Pin details

10 connections

VIN
Power input for the NeoTrellis board, shown in the Adafruit NeoTrellis guide wiring table as VIN.
Power
GND
Ground reference for the NeoTrellis board, shown in the Adafruit guide wiring table as GND.
Ground
SDA
I2C data connection. The Adafruit guide maps SDA to I2C data.
I2C
SCL
I2C clock connection. The Adafruit guide maps SCL to I2C clock.
I2C
INT
Optional interrupt output. The Adafruit guide says INT can connect to a digital pin on the host microcontroller.
Signal
A0
I2C address solder jumper. The guide says address jumpers hard-code unique addresses for tiled boards.
Analog
A1
I2C address solder jumper. The guide says address jumpers hard-code unique addresses for tiled boards.
Analog
A2
I2C address solder jumper. The guide says address jumpers hard-code unique addresses for tiled boards.
Analog
A3
I2C address solder jumper. The guide says address jumpers hard-code unique addresses for tiled boards.
Analog
A4
I2C address solder jumper. The guide says five address pins can change the seesaw I2C address.
Analog

Start wiring

I2C · Analog · USB · 3.3 – 5 V · Breakout

Confirm the data interface matches your host board.

Module pins: VIN, GND, SDA, SCL, INT. Schematik maps them to your board in the app.

Keypads

36 other options

Matrix keypads, analog ADKey boards, I2C keypad controllers, joysticks, and finished USB-HID keyboards are all here. Pin budget and simultaneous-press requirements are the splits that matter.

View all 36

Related groups

4 groups

Buttons & switches

Most parts here are simple contacts: press or release, open or closed. A few outliers — rotary switch potentiometer breakouts, NeoPixel potentiometers, wiper plungers — carry separate wiring requirements worth checking before you order.

Input & controls · Buttons & switches · 106 parts

Encoders

Bare EC11 quadrature encoders, I2C navigation encoders, absolute AS5600 and 8421 encoders, slide and ribbon potentiometers, and digital I2C pots — covering most ways to read angular or linear position.

Input & controls · Rotary encoders · 28 parts

Touch

MPR121, CAP1188, CAP1203 Qwiic slider and AT42QT breakouts are sensor ICs for electrodes you wire yourself. Simple single-pad modules like the TTP223B give you one digital output with no bus required.

Input & controls · Touch sensors · 14 parts

3D printing

DFRobot 1.75 mm PLA in 1 kg spools makes up the bulk of the group, in over 15 colors. Specialty options include PVA in both diameters, NinjaFlex flexible filament, Proto-Pasta conductive PLA, and wood-fill. OverLord printer spares and OverLord printers round out the hardware side.

Tools & prototyping · 3D printing · 53 parts