Hacker News Reader

The advantage of their integrated LCD and Arduino is that it would only use 2 pins instead of the 6-7 that would be occupied by the shield you linked. This would allow you to connect other shields and have more room for add-ons. I agree that $89 is steep though, hopefully that price can come down as more are made.

View on HN

I don't understand how this board only "uses 2 pins". The schematic shows the ezLCD component still uses 7 pins for I/O. Using the SPI bus requires 4 pins and the other 3 are presumably for the touchscreen sensing. The board still has the full Uno footprint, so you could connect other stuff to those pins at the same time, but you couldn't do anything with them while driving the LCD.

Dallas 1-wire? Haven't looked at the schematic or anything else, but that's an example of an interface that just requires 2 connections - signal and ground.

That's not what this uses.

There is a PIC24f that does all the graphics processing, and the arduino talks to it through serial. the spi connection is used to program the atmel . the other connections are optional for use like a interrupt on touch .

Reply on news.ycombinator.com