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7-Segment-Display

I want to show you in this "Instructable" how to control 7-Segment-Display

What you need:
*Arduino Duemilanove
*a lot of 7-Segment-Display
*a lot of push Button
*a potentiometer
*8 x 120 Ohm resistor
*4 x 1k2 Ohm resistor
*2 x 1k Ohm resistor
*4 x BC547 Transistor
*1 x 74HC595
*breadboard
*wire

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Step 17-Segment displaying with potentiometer

On this step i worked with a shiftregister (74HC595). I connected the pins of 7-Segment to the shiftregister(a-g -> Q0, Q6). And a potentiometer to displaying the characters. Down here you can see the schematic.

latchPin = 8; // pin 12 on the 74hc595
clockPin = 12; // pin 11 on the 74hc595
dataPin = 11; // pin 14 on the 74hc595

And you can download the Programm Code

7SegmentShiftregister.txt2 KB

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11 comments

May 2, 2012. 7:05 PMlemonhead_oo7 says:

Nifty!

What about a 2 digit potentiometer controlled version?

Mar 4, 2012. 1:58 AMDaniyal Khan says:

is that arduino avalaible in the market easily??

Mar 4, 2012. 11:27 PMmertaxoy (author) says:

yes, is it !

http://www.ebay.com/itm/Arduino-UNO-2011-Version-ATMEGA328P-PU-AVR-MCU-Board-USB2-0-Cable-/180833433758?pt=LH_DefaultDomain_0&hash=item2a1a83389e

Jul 21, 2011. 6:18 AMkyubok says:

can u help me?,, how to program a 2 digit 7segment display, for count up and count down.... pls.. guide me...

Jul 21, 2011. 7:26 AMmertaxoy (author) says:

so 0 have added the 3th step for you pleas take a look at it ;)
feel free to ask me anything..

Jun 5, 2011. 3:12 PMmailman0001 says:

How come it's not counting up or down? All of leds are off except the middle bar (g) and when I push ether one of the push buttons it cut off and back on once released. I even tried wiring a-g with 3V or 5V (high). Is there something else I maybe missing that's not in picture ( Count down and up with 2 push buttons)?

Jun 6, 2011. 1:36 AMmertaxoy (author) says:

i think i forgot the pull up resistors from buttons to ground... (1kOHM)...

Jun 5, 2011. 3:27 PMmailman0001 says:

And I'm using the Arduino Uno by the way! This shouldn't make a difference,should it ?

Jun 6, 2011. 1:32 AMmertaxoy (author) says:

no, it shouldn't...

Jun 4, 2011. 9:06 AMmailman0001 says:

what kind of 7 segment do you used for this project?

Jun 5, 2011. 1:12 AMmertaxoy (author) says:

common cathode - http://www.conrad.at/ce/de/product/160172/7-SEGMENTANZEIGE-14-MM-A/SHOP_AREA_17651&promotionareaSearchDetail=005