I am in the process of trying to draw up a multiplexed display .
I am having trouble with the circuit
I would like to use the parts I have listed in the circuit digram on the attachement.
It is a up counter to 99 then reset.
Help.

Attached Images

segement_counter_7.jpg (50.3 KB, 237 views)

 

From my observation, there is no way that the circuit will work. How does this circuit do the counting? you need a counter like Sebi said in your other post http://www.electro-tech-online.com/v...ic.php?t=12569

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Jeff
To the optimist, the glass is half full.
To the pessimist, the glass is half empty.
To the engineer, the glass is twice as big as it needs to be.

 

There is no counter IC, the mux is a data select and your inputs are floating, you have to demux it to drive encoder then decoder driver for display. Well you don't have to demux it most of the time.


I will look into some. What is wrong with using a ripple counter or a cascading counter???

For mux displays:
2) 74192 counters, 1's counter and decade counter
1) 555 Timer
1) 74157 to 7447 decoder driver
1) free running clock, pulse, logic switch, etc (another 555 astable pulse can be used here)

All the inputs are used on the mux. I didn't use any transistors on my project display.

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