Damn, given away by my own documentation

Yes, it's an autopilot/telemetry/data logger widget for model aircraft. I was a little bored a few weekends ago, and decided to take all the different odds and ends of boards for my fly by wire project and make one overcomplicated unit

Specs are:

CPU board:

180MHz 200 MIPS ARM9 processor
64MB SDRAM
4MB Flash
1 low/full speed USB host port
1 low/full speed USB slave port
1 RS232 serial port
1 MiniSD card socket
onboard 3.3/1.8V linear PSU
runs from single +5v supply

Sensor board 1:

10 buffered 5v hardware PWM servo ports, standard futaba wiring
8 buffered 5v compatible servo inputs, standard futaba wiring
2 buffered 5v compatible RPM sensor inputs
2 TTL serial ports, both 3.3v/5v compatible
3.3v I2C port
5V I2C port
64KB non-volatile I2C parameter storage
differential pressure sensor (airspeed indication)
absolute pressure sensor (barometric altitude)
battery voltage monitor input
battery or motor current sensor input
onboard temperature sensor
5 uncommitted 0-5v analog inputs (external temperature sensors, etc)
3 axis accelerometer (lateral and vertical translation, from 1.2G to 18g max)
3 axis gyro (roll, pitch, yaw, from 75 deg/s to 300 deg/s max)
1200 baud modem transmitter (telemetry feed via audio channel of video tx)
optional 10/100 ethernet on secondary board

overall system dimensions 2.2 x 3.2 x 0.8 inches, weight including minisd card 42g

Admittedly, it's twice the size and weight it should be, but it's only a quick prototype. Generation 2 will be quite small.

A couple of friends are writing the autopilot software to go with it. There is a little GPS unit and a single-cell LiPoly PSU as well, all up the system currently weighs about 85g. I'm going to try to hack together some software over the weekend to at least log the altitude and G readings, so I can have a play during the good weather.

I'm curious to see how many G my camera plane pulls in a tight vertical loop, you can see the wings bend rather alarmingly so I'm thinking 3+ at least.

There's a bigger picture of the thing here , and one of the better aerial photos here.

pca