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Thanks. Could you explain that last bt to me in more detail please?
"From the formula Tw=0.45 x Cext (pF) x Rext (k), I get 67,5 uS. So there must be some wiring mistakes."
What is Tw and Cext and Rext? I shall check my wiring. Thanks for helping an beginner.
Hi,
I have made a circuit in proteus, but i ned a little help in understanding it and making it work. It is a simple 2x seven segment display counter with 2x 555 circuits. I need help controlling the speed it counts. Im not sure if there is a problem with my poor math.
If for example I needed...
Thanks for all the advice, very helpful, and it is now working. I have one more small favour. I need help with the equation and/or my poor math. If for example I needed to make my counter count at one count per second, how would I achieve this? I believe it would be by adjusting the R1 and R4...
In my messages after simulation is stopped it has 4 errors.
Pin "CX" is not modelled U3:A
Pin "RX/CXCX" is not modelled U3:A
Pin "CX" is not modelled U3:B
Pin "RX/CXCX" is not modelled U3:B
Yes, thank you. The 7seg displays are now working. But they are not counting numbers. They are displaying strange displays. I have run it step by step too and it is not working properly for some reason. I have noticed too that my link test button does not light all the LEDs as I planned for some...
Hi,
I am very new to proteus and would much appreciate a little help. I have made a schematic in which to count with 2 seven segment displays. I thinkit is all working as I can see the red/blue switching colours. But the displays remain dark. I think I have them powered but nothing. They...
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