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Pololu 1608 - Parallax ColorPAL
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  • Pololu 1608 - Parallax ColorPAL
ID: 196150
Parallax ColorPAL
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Parallax ColorPAL

The Parallax ColorPAL combines an RGB LED, a light sensor, and a microcontroller to make a color sensor that can also be used as an ambient light detector and a color generator. Readings are reported via a 1-wire asynchronous serial interface.


ColorPAL side view.

Overview

The ColorPAL from Parallax is a miniature color and light sensor that can double as a color generator with its RGB LED. When sensing color, the ColorPAL uses its LED to illuminate a sample one color component at a time while measuring the light reflected back with a broad-spectrum light-to-voltage converter. The amount of light reflected from the sample under illumination from each red, green, and blue LED can be used to determine the sample’s color. For the ColorPAL to detect the color of a subject, the subject must be reflective and non-fluorescent. The color of objects that emit light (e.g. LEDs) cannot be detected.

Features

  • Detects a wide range of colors and outputs data as 10-bit RGB (Red/Green/Blue) components.
  • Detects broad-spectrum ambient light with sensitivity down to 44µW/cm2 per lsb.
  • Generates 24-bit color using onboard RGB LED.
  • Plugs into servo headers or cables or solderless breadboards.
  • Single-pin interface uses a simple serial protocol to define and initiate color detection and generation.
  • Color detection and generation details handled by onboard microcontroller.
  • Onboard EEPROM for saving custom color detection and generation programs.
  • Autorun feature permits running a pre-designated EEPROM program with only a power supply.

Specifications

  • Power requirements: 5.0 VDC
  • Communication: 1-wire serial (asynchronous, non-inverted, open-drain serial protocol) with automatic baud rate detection from 2400 – 7200 bps
  • Dimensions: 1.72 × 0.90 × 0.65 in (44 × 23 × 17 mm)

Communication

Communication with the ColorPAL takes place using serial I/O, transmitting and receiving at between 2400 and 7200 baud, using a non-inverted, open-drain protocol. The ColorPAL includes a pull-up resistor to Vdd, so you do not need to apply one externally. Because of the open-drain protocol, the pin used to communicate with the ColorPAL should always be configured as an input, except when being driven low. Also, when starting up, you should wait for this pin to be pulled high by the ColorPAL before trying to send it any commands. Please see the user’s manual (297k pdf) for more information.

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196150

Producent BTC Korporacja sp. z o. o. Ludwinowo Zegrzyńskie 52G 05-140 Ludwinowo Zegrzyńskie Polska sprzedaz@kamami.pl 22 767 36 20

Osoba odpowiedzialna BTC Korporacja sp. z o. o. Ludwinowo Zegrzyńskie 52G 05-140 Ludwinowo Zegrzyńskie Polska sprzedaz@kamami.pl 22 767 36 20

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