Different version of RGB LCD shield

[zhangxu92]

Hi, I'm an uni student from UK and I just purchased an [RGB Positive 16x2 LCD+Keypad Kit for Raspberry Pi product number 1109] on Amazon UK. However what I have been looking at the whole time was another (maybe newer?) version of this shield [products/716]. I'm just wondering if the one I got is compatible with Arduino Leonardo and are the libraries in 716 usable in this version of the shield? Is there any difference between these two shield except the layout? Thanks in advance

[adafruit_support_bill]

Product #1109 is designed to work with the Raspberry Pi. It has similar circuitry to the original Arduino RGB/LCD shields #714 and #716, but has been adapted to use the Raspberry Pi GPIO header and 3.3v logic.
https://www.adafruit.com/product/1109
https://www.adafruit.com/products/714
https://www.adafruit.com/products/716

Although the #1109 headers will not plug directly into the Arduino, it is possible to make it work. You would need to run wires for GND, +5v, +3.3v, SDA and SCL.

You can use the RGB/LCD shield library on the Leonardo to drive it. https://github.com/adafruit/Adafruit-RG ... ld-Library

[zhangxu92]

thanks for the clarification, I wasn't planning to use this as a shield anyways so i'll give it a go. May I ask which pin I should connect +3.3v to? cannot find in on the schematics

[adafruit_support_bill]

Looking closer, it does not need the 3.3v because the Pi has built-in pullup resistors to 3.3v for the i2c bus.

What you do need is 10K pullup resistors to 5v from the SDA and SCL lines. The Arduino does not have these built-in.

[zhangxu92]

Hi, i have made it work as intended thanks for the help.

Another question: is there an average power rating of this shield?

[adafruit_support_bill]

It depends mostly on the state of the backlight. If set to white, it will be somewhere in the 50mA range.