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Topic: 7 segment display (Read 788 times) previous topic - next topic

pranoy

hi guys,

         I am new to arduino. So pls help


         can i interface 7 segment display with arduino uno????
         if yes how and how many pins i need ????

CrossRoads

Sure - just need 7 pins, 1 for each display segment.  Make sure to use appropriate current limit resistor.
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

pranoy

thanks


but one more question

is there any way in which i can control a 7 segment display using a single pin?????

CrossRoads

As in, turn a knob for a potentiometer and have the reading change on the display?  Sure, easy enough.

Control 7 LEDs from 1 pin?  No.
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

pranoy

it need not be 7 segment display


i have around 3 to 4 pins free on my board
i have to interface a display which has two numbers(00-99)

is there any way????

dhenry

Sure.

IO expanders, shift registers, etc.

pranoy

thanks dhenry

but can u explain some more

CrossRoads

Connect your LED displays to a shift register. The shift register needs fewer pins to control, generally 3: the datapin, the clockpin, and a latch pin, connected thusly.
In this example, MOSI is the serial data that gets shifted in, SCK is the clock line that stores each bit, and SS is the latch signal that moves the data to the output register.
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

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