Arduino Proto Shield Rev3 (Uno) offers an Uno-sized prototyping playing field, making it easy to design and implement custom circuits for any Uno-based project using Surface Mount (SMD) or Through-Hole (TH) components. The SMD area is designed for a maximum of 24-pin SOIC ICs, and the TH area contains plenty of space for the needed components around your project. A mini breadboard (not included) can also be connected to the prototyping area for solderless operation. The prototyping area includes two power lines (IOREF and GND), two LEDs pads, and SPI signals breakout pads for boards with SPI only on the ICSP (In-Circuit Serial Programming) connector, such as the Arduino Zero.
1.0 Arduino Pinout
1 ICSP Connector footprint
2 LEDs and resistor footprint
IOREF and GND power lines
SPI signals pads
24-pin SOIC SMD footprint (50 mils pitch)
Arduino Uno WiFi Rev2
Uno Microcontroller Board based on the ATmega4809 MCU, with an integrated WiFi module.