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Tuesday, 4 November 2014

Circuit for Two Seven Segment Displays, Arduino Mega + 7490 + 4511 (Part 1 of 9)

by realfinetime  |  in Seven Segment Display at  01:58

<<<<  Previous : One Seven Segment Display + 7490 + 4511 + Arduino Mega

          In the last blog, we saw the circuit to control a common cathode seven segment display using an arduino mega, a 7490 and a 4511. Here, we will design a circuit to control two common cathode seven segment displays using an arduino mega, a 7490 IC and two 4511 ICs. Circuit is done as shown in the following diagram.

          Complete the circuit. Ground terminal of external voltage source and ground pin of arduino should be interconnected. Otherwise, circuit will not work. Read the remaining part in next page.

Continued in Next Part (Part 2) >>>>


  1. Great project, but why do you not multiplex the led 7 segment displays ?It would limit the number of 4511 chips to one and add a tranzistor for each 7 segment display.Code would also need to chamge though.

  2. It is truly a well-researched content and excellent wording. I got so engaged in this material that I couldn’t wait to read. I am impressed with your work and skill. Thanks.
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All the circuits, published in this blog is only after testing and getting proper results in my private lab. When you try these circuits, you should check the supply voltage, polarity of components, presence of childrens nearby and shorts in the circuits. This website will not be responsible for any harm happened to you or your components caused by your carelessness.

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