Let’s start with the name, 444-AVXB stands for:
- 4 Amps (2 amps x 2 motors) via a L298 motor driver
- 4 ADC’s (Analog inputs) via a MCP3204 chip
- 4 Servos with connections to power and with current-limiting resistors on the signal wires
- Audio-out (non-amplified)
- Video-out via a standard RCA jack
- Connections for an X-bee
- Connections for a BlueSmirf Bluetooth unit
he 444-AVXB was designed with the robot hobbyist in mind. Connections are available for just about every “standard” thing you would find on a small to medium-sized robot. A hefty motor driver handles decent-sized motors with nice screw terminals for both power and motor connections. (4) 3-pin connections are provided for servos which can be powered by either external power or on-board power. An ADC chip allows for 4 analog inputs to be read, great for analog sensors, pots, LDR’s etc.
Video-out takes advantage of the awesome video capability of the prop and can be connected to any TV with a “video-in” and/or many of the cheapie 7” LCD screens (found on Ebay). Audio is just that, audio out with the circuit being the same as can be found on many other propeller products. Pin 15 has been brought forward as well for a Ping))) sonar unit. Finally, there is room and connections for EITHER an X-bee or Bluetooth module. All unused pins are accessible via female headers.
A quick look is up on LetsMakeRobots. A few more photos;