Hello , i want to start a new project and i will need: 1x LCD (16x2 - characters and numbers) 1x Keypad (1-9 only) 1X GSM Shield 2x Fan 1x temperature sensor 1x water sensor 1x co2 sensor 40x leds Are there enough ports on arduino UNO R3 for my project ? Thanks...

Can i connect all of them to my arduino Uno R3 ?

dc42 October 19, 2012, 7:37pm 14

You can drive that LCD display with 6 pins (EN + RS + D5-D7). Ground the RW pin.

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