RPM  - 	mechanical
	Hall effect
	Optical		breakbeam
			reflective		Digital  8 bit counter 	1/sec		1D

Temp -	Thermistor
	Thermocouple
	Optical		IR			Analog 10 bit	     	1/15secs	1A

MPH  -	optical
	mechanical
	Hall effect				Digital  bit counter 	1/sec		1D

suspension
     -	Mechanical
	Hall effect with rack
	Optical
	Ultrasonic
	Resistive	Linear rod potentiomenter
			Wire Potentiometer	Analog 10 bit	     	5000/sec	4A

Pitch Roll Yaw
	Gyro					Analog 10 bit	     	1500/sec	3A
	Accelerometer


Ancillaries
Switch
	Start					Digital 				1D
LED	Dual Colour				Digital 				2D

USB						Digital					2S (D+D-)

SPI	Storage					Digital					3S

RS232	Debug					Digital					2D

usb 	auto data transfer								1D


Pins required
8 Digital
8 Analog
5 Signal
2/4 Power Gnd
28-40 pin

Voltage 		3-5V
ADC 			resolution 10bit +
clock speed		16Mhz +
Rom			4K words +
RAM 			64bytes +
USB			1
SPI			1