Hey there!, in this post I will show you how to interface 4 digit 7 segment display to arduino UNO
and count 1-9.
Component Required:
arduino UNO
4 digit 7 segment display
jumper wires
breadboard
resistor 1k ohm x3
![](https://static.wixstatic.com/media/8fedc5_ae3cc985777740fab181b3a24c776d4b~mv2.jpg/v1/fill/w_255,h_198,al_c,q_80,enc_auto/8fedc5_ae3cc985777740fab181b3a24c776d4b~mv2.jpg)
![](https://static.wixstatic.com/media/8fedc5_c1de42ac26d84fe1809f9562d8af12ad~mv2.jpg/v1/fill/w_487,h_336,al_c,q_80,enc_auto/8fedc5_c1de42ac26d84fe1809f9562d8af12ad~mv2.jpg)
![](https://static.wixstatic.com/media/8fedc5_46f8327c0b52484483d78ff3dd70ca8e~mv2.png/v1/fill/w_203,h_248,al_c,q_85,enc_auto/8fedc5_46f8327c0b52484483d78ff3dd70ca8e~mv2.png)
Circuit Diagram:
![](https://static.wixstatic.com/media/8fedc5_b0594ed3ddea4061b92fd5ce0bc1dd26~mv2.jpg/v1/fill/w_900,h_675,al_c,q_85,enc_auto/8fedc5_b0594ed3ddea4061b92fd5ce0bc1dd26~mv2.jpg)
![](https://static.wixstatic.com/media/8fedc5_af81f305f3c1446d895661f8bc888eff~mv2.png/v1/fill/w_980,h_958,al_c,q_90,usm_0.66_1.00_0.01,enc_auto/8fedc5_af81f305f3c1446d895661f8bc888eff~mv2.png)
Procedure:
connect 7 segment display to arduino as per first diagram then after use 1k ohm resistor then upload the code and run on arduino IDE software.
![](https://static.wixstatic.com/media/8fedc5_8c599534b51d4820aa6eee0d33134a9a~mv2.jpg/v1/fill/w_980,h_557,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/8fedc5_8c599534b51d4820aa6eee0d33134a9a~mv2.jpg)
![](https://static.wixstatic.com/media/8fedc5_fd53f887ca72442ebc386a1454fd8a90~mv2.jpg/v1/fill/w_980,h_519,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/8fedc5_fd53f887ca72442ebc386a1454fd8a90~mv2.jpg)
Upload the code to Arduino UNO:
here, link to download of code.
Result:
![](https://static.wixstatic.com/media/8fedc5_b9ab58b7a41d4100aa31868e29835bd8~mv2.jpg/v1/fill/w_980,h_490,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/8fedc5_b9ab58b7a41d4100aa31868e29835bd8~mv2.jpg)
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