I mainly needed some asurance that I was reading everything correctly before I pulled the trigger on the product that best controls the Red's/Greens/Blues through the i2c bus. There are currently three different options that we (as 18pin RGB LCD & Raspberry Pi owners) potentially have (with a little work):
/ Adafruit I2C Controlled + Keypad Shield Kit for 16x2 LCD
The Quote: "The shield is designed for 'classic' Arduinos such as the Uno, Duemilanove, Diecimilla, etc. It will also work perfectly with Arduino Mega R3's.
" is making me think it'll only work with Arduinos and not a RPi even though it's configured for a 18pin LCD, has the chipset/resistors, and uses i2c. Instead of using the LiquidCrystal library of an Arduino we could just use Python. I did notice that there's more resistors, potentiometers, etc. so it might not work.** When I went to the Adafruit RGB LCD for Raspberry Pi tutorial the first "Featured in this Article" product is for the same shield but with an LCD in the Arduino section. This product is "In-Stock" **
Tutorial: http://learn.adafruit.com/adafruit-16x2 ... i/overview
Featured in this article link: http://adafruit.com/products/714
/ RGB LCD Shield Kit w/ 16x2 Character Display - Only 2 pins used!
This is the same product in the "Featured in this article" link. Problem is, at the very bottom the tutorial link goes to the RGB LCD Shield tut found here (http://learn.adafruit.com/rgb-lcd-shield
) which looks to be for an Arduino. This product is also in the Arduino Shield section. ** This package is NOT in stock however the shield (#1) IS in stock -- Seems like the 16x2 RGB LCD is out of stock BUT the 20x4 RGB LCD's are in stock (https://www.adafruit.com/products/499) and could be used just the same.
/ Adafruit RGB Positive 16x2 LCD+Keypad Kit for Raspberry Pi
This is the only
one listed for the Raspberry Pi for RGB. This product is out of stock even though the shield (#1) is in stock and we can use the 20x4 LCD.
The backpack listed in the LCD section (https://www.adafruit.com/products/292
) for i2c does NOT allow for the RGB pins. It's only for 16pin boards and not 18pin. From the link "You can try to connect our RGB 16x2 or 20x4 LCDs up but this backpack will not control the RGB backlight so you'll have to use the backpack only for the 14 digital IO pins (pins #1-14) and connect the backlight pins (#15-#18) directly to your microcontroller with 4 extra wires for color/PWM control as if they were just an RGB LED."
-- Raspberry Pi's only have one PWM GPIO (#18 i think) and thus could not control the RGB like an Arduino could in this situation = Can't use an RPi
Can I just purchase the shield (#1) and use it for the Pi even though it's listed for the Arduino? All the listings and guides run me in circles and I've spent wayyy too much time trying to sort it out. Any help is much appreciated! Getting frustrated