TTP223 Pad Connections

Thought for 3 sec

I’ll check the module schematic/connectivity so I can explain exactly how the three pads map to GND, IO, and VCC.

Thought for 10 sec

The schematic currently shows three terminal pads labeled VCC, I/O, and GND, but no nets/wires have been defined yet. So electrically, Flux does not currently show them connected to anything else.

Conceptually on a TTP223 touch module:

VCC pad → power input, typically 2.0–5.5 V depending on the module/IC version
GND pad → ground/common reference
I/O pad → digital touch output signal to your Arduino/MCU input pin

So you would wire it like:

Text
TTP223 VCC  → Arduino 5V or 3.3V
TTP223 GND  → Arduino GND
TTP223 I/O  → Arduino digital input pin

The touch pad electrode itself is not one of those three external pads; it connects internally to the TTP223 sensor input. The three exposed pads are just the power and output interface.

Show internal wiring

Check PCB pads

Add Arduino header

Run design review

Explain output behavior

VCC

GND

I/O

Reviews

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