At last, designing bespoke circuits is a doddle thanks to the ProtoShield. Soldering TH or SMD ICs onto the prototyping area to test them with your Arduino board is truly simple. The SMD area is engineered for upto 24 pins SOIC integrated circuit and there’s plenty of space on the TH area for all the necessary components around your project. If you prefer a solderless project, simply stick a mini breadboard (not included) on the protoarea. The proto area also features two power lines (IOREF and GND), two LEDs pads and SPI signals breakout pads for boards with SPI only on the ICSP header like Zero.