TinyCircuits TinyShield Proto Board 3 2.54mm/0.1"

This proto board brings many of the TinyShield signals out to a point
that you can solder to. All of the signals are marked and are spaced
with 0.1 spacing (same spacing as on the standard Arduino Uno), so a
standard 0.1 header can be used if desired. Note: Be sure to check the
specifications to make sure this board has the TinyShield signals you
need. Also check Proto Board 2 to see if the signals it supplies meet
your project needs. If you need every TinyShield signal on one board
(although with smaller spacing), use Proto Board 1 Specifications:

* Ultra compact size and weight (smaller than a US Quarter!)
* Square Version: 20mm x 20mm (.787 inches x .787 inches)
* Circular Version: 20mm (.787 inches) diameter
* Max Height (from lower bottom TinyShield Connector to upper PCB
level): 2.81mm (0.111 inches)
* Weight: TBD grams (TBD ounces)

Includes the following signals:

* VCC
* VBATT
* +3V3
* +5V
* VIN
* GND
* RESET

* IO0
* IO1
* IO2
* IO3
* IO4
* IO5

* IO6
* IO7
* IO8
* IO9
* AD4/SDA
* AD5/SCL