What is the purpose of a common cathode in electronic circuits?

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A common cathode configuration in electronic circuits refers to a setup where the cathodes of multiple LEDs are connected together to ground, allowing the anodes to be controlled individually. In designing a 2-bit full adder, one can use either discrete logic gates (AND, OR) or an integrated circuit (IC) like the 4008 for convenience. For displaying outputs on a seven-segment display, it is essential to understand the pin configuration, including connecting the common cathode pins to ground. Students are encouraged to sketch their initial designs and ask specific questions for guidance rather than seeking direct answers to assignments. Engaging with the foundational concepts of full adders and seven-segment displays will enhance understanding and project execution.
zeroground
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1. i want to design a 2 bit full adder (that adds two numbers each having 2 bits) with carry in and carry out and to show the output on seven segment display..




3. the problem is that i am student in mechanical power and i am taking an electronics course..can you tell me what to do or some hints please..
 
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answer me pleaseee... what do i have to do ?
is there an ic called full adder or i have to make it with OR and AND gates ?
 
You can get a 4-bit full adder as an IC:

http://www.doctronics.co.uk/4008.htm
 
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Janus, can u tell me what to do please with my project ?
 
is there vcc and ground for the seven segment ?
 
what is the common cathode (3,8) ? does it means that these two pins (3,8) must be connected to the ground ?
 

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