The Color Meter
meter [at] saccade.com
The Color Sensor is a simple to use, low cost tool for getting color readings from both reflected and emitted light. It gives readings in multiple intuitive formats, both on a built-in LCD display, and also on a larger web page available over a local network. The Color Sensor is lightweight and portable, making it easy to use in a variety of environments.
The Color Sensor uses the TI/Stellaris LM3S9B96 MCU to control all operations. This was a 32-bit ARM chip, with a unique ROM containing a multi-tasking OS and device drivers. This MCU has since been phased out by TI. The MCU communicates with the color sensor over using the built-in I2C interface, the LCD display using a modified SPI protocol, the Ethernet using the built-in Ethernet controller, serial IO for system debugging and number of switches and indicators via parallel I/O.