[Moved] 7-segment display multiplexing frequency and duty cycle

[imranahmed]

Please let me know that what is the duty cycle and frequency for 7-segment display showing digits without flickering?

 

[anj]

Re: 7-segment display multiplexing frequency and duty cycle

if possible, I think you can use latches to avoid flickering.. just single time data sending no need of keep sending..

 

[imranahmed]

Re: 7-segment display multiplexing frequency and duty cycle

Please if you have more information about multiplexing 7-segment display more than 2 so please guide me i am using Atmel 89c52 microcontroller.

 

[anj]

Re: 7-segment display multiplexing frequency and duty cycle

you can use transistors as switch or you can use 4094 chip(8 bit shift register) to drive three display.. what do you actually want?? I mean what is your application??
regards

 

[jeffrey samuel]

Re: 7-segment display multiplexing frequency and duty cycle

With out proper description of the application there is no point you will be able to get prper op here

 

[anj]

Re: 7-segment display multiplexing frequency and duty cycle

if you are using proteus.. I've attached a demo of connecting multiple seven segment on same port.
since I was in trouble at my project to find solution like this easy problem.
so, I don't want you to do same..
View attachment help seven.zip

 

[imranahmed]

Re: 7-segment display multiplexing frequency and duty cycle

Separate segments can not work but 4 pair of seven segment display work well and i can run successfully.You can see in attached pic.

 

[anj]

I think That's one and the same thing...

 

[imranahmed]

Re: 7-segment display multiplexing frequency and duty cycle

Dear samuel,
I want to build digital voltmeter for displaying 220v by using Atmel 89c52 uC and I have successfully multiplex 4 7-segment display but problem is that conversion of hex data into its corresponding 7-segment data.I can attached ADC0804 both are run successfully but how I implement to display 0-220v,there are 0-to-220 (221v) values, I was write c-code but it become large.Please i need some hint for my project.I attached proteus file and c code and hex file.