We will now go over each component. First we have the power jack, where you connect the battery, or wall plug. Next are the digital input ports. There are 16 total inputs. These ports can be used to bring in any type of digital information that operates at Transistor-to-Transistor Logic (TTL) levels. TTL levels refers to a voltage level of 5 volts as being on, or high, and a voltage level of 0 volts being off, or low. The next 16 ports are the analog input ports. These ports measure analog voltages between 0 and five volts. Unlike the digital ports these ports can tell the difference between any voltage value between 0 and five volts, whereas the digital ports can only tell if the input is high (5 volts), or low (0 volts). Along the top edge of the board is a row of ground sockets called VSS. These sockets allow you to connect a wire to 0 volts. Just below the ground sockets are the VDD sockets, which allow you to connect a wire to +5 volts. On the right hand side of the board is the serial port, where you connect the board to the computer. To the left of the serial port is the Javelin Stamp, or the brain of the board. Known as a microcontroller, the Stamp is essentially a computer all on one chip. This is what you will be programming later on in this manual. The next feature to take note of is the motor output. This is where you will connect the motors to the board. Left of the motor outputs are the digital output ports. These ports let you send electronic signal out of the board. To the left of the digital ports is the wireless communication port. This is where the optional wireless transceiver plugs into. Finally on the right hand side of the board is the on off switch. The robot is off when the switch is in the C position, and is on when in the NC position.