Tecnologia

Thi s tutorial shows how to connect the 1602A LCD di splay and a light sensor to your Ardui no
(UNO) and di splay the li ght intensi ty on the screen. I am using only parts from the Ardui no starter kit I got from Deal Extreme.

Thi s is one of the fi rst thi ngs I try wi th the Ardui no, but si nce I could not find one tutori al that covered the combinati on of usi ng the LCD screen ánd the li ght sensor, I decided to wri te one beginner tutori al. Also there are many different versi ons of the 1602 LCD display with di fferent pi nouts and I couldn't really find whi ch the DX version exactly was.

MATERIALS USED
1 x Arduino UNO
1 x Breadboard (63 columns)
1 x Light sensor
1 x 50K pot meter
1 x 1602A LCD display
1 x 10K resi stor
1 x Connector (16 pins)
1 x USB cable

THE LCD DISPLAY
The LCD di splay comes with no connector by default. This way you can solder wi res to i t, solder a connector on it, whatever you want. I choose to solder the connectors to the back so I could press the LCD di splay on the breadboard. To do thi s, snap of a row of connectors (16 pi eces) and stick them (short pi n up) trough the LCD display connectors.

Sti ck the LCD di splay i n the breadboard, somewhere on the ri ght in the lowest row of holes so you can connect the breadboard wires above and the di splay rests on the unused rows of the breadboard. CONNECTING THE DISPLAY AND BREADBOARD
Fi rst you need to power the display and i ts backlight. Connect two wires from +5v and GND to the plus- and mi n rows of the breadboard.
Connect: Ardui no 5v (pin 3) > plus column on breadboard
Connect: Ardui no GND (pi n 4 or 5) > mi n column on breadboard

Then connect the LCD power and the backli ght power to the plus- and mi n rows.
Connect: GND row (mi n) on breadboard > pi n 1 on LCD (VSS)
Connect: +5v row (plus) on breadboard > pin 2 on LCD (VDD)
Connect: +5v row (plus) on breadboard > pin 15 on LCD (A)
Connect: GND row (mi n) on breadboard > pi n 16