Hello,
I wanted to ask on how can I load a number in 74hc192 ? I'm doing a counter circuit with three digits, so I have a counter for each digit, however, it starts from zero and sometimes random numbers. How can I get the counter to start from 9 ? Thank you.

 

Have you read the datasheet? Can you describe for us what PL, P0, P1, P2 & P3 are?

What are you using the 74HC192 for in the big picture?

 

Hello,
I wanted to ask on how can I load a number in 74hc192 ? I'm doing a counter circuit with three digits, so I have a counter for each digit, however, it starts from zero and sometimes random numbers. How can I get the counter to start from 9 ? Thank you.

Please post a schematic of how you are using the counter so that we can look for the cause of the random numbers -- there are a few possible reasons.

 

Hello,
I wanted to ask on how can I load a number in 74hc192 ? I'm doing a counter circuit with three digits, so I have a counter for each digit, however, it starts from zero and sometimes random numbers. How can I get the counter to start from 9 ? Thank you.

Use pins P0,P1,P2, P3 to set the binary value of 9.
Then the value of the output will be set to 9 when the Parallel Load (PL) pin goes from Hi to Lo.

 

Have you read the datasheet? Can you describe for us what PL, P0, P1, P2 & P3 are?

What are you using the 74HC192 for in the big picture?

I did read the data sheet. PO, P1, P2, P3 are the inputs of the counter, I usually don't use those so they are connected to ground. PL is the parallel load, where I can load the counter with a value, I tried connecting logic gates AND to get the value 1001 and the output was inserted in the load but nothing happened.
I think I can add it in the inputs, can't I ?

 

Use pins P0,P1,P2, P3 to set the binary value of 9.
Then the value of the output will be set to 9 when the Parallel Load (PL) pin goes from Hi to Lo.

I'll try that, thank you very much.

 

I did read the data sheet. PO, P1, P2, P3 are the inputs of the counter, I usually don't use those so they are connected to ground. PL is the parallel load, where I can load the counter with a value, I tried connecting logic gates AND to get the value 1001 and the output was inserted in the load but nothing happened.
I think I can add it in the inputs, can't I ?

You may not normally use them but they are required if you want a preset value. You can simply pull P0 and P3 to High. Then use some logic to trigger a pulse to the PL pin to load the preset value when you want a 9 on the output.

 

You may not normally use them but they are required if you want a preset value. You can simply pull P0 and P3 to High. Then use some logic to trigger a pulse to the PL pin to load the preset value when you want a 9 on the output.

How can I trigger a pulse ? Can I do that with a push button instead of the clock signal ?

 

How can I trigger a pulse ? Can I do that with a push button instead of the clock signal ?

Yes, a push button works fine. Make sure you use a pull-up resistor to keep a 5v signal on the PL pin until the button is pressed to ground the pin. Google "pull up resistor" if needed.

 

Yes, a push button works fine. Make sure you use a pull-up resistor to keep a 5v signal on the PL pin until the button is pressed to ground the pin. Google "pull up resistor" if needed.

Yeah, I've used those plenty of times. Thank you for you help.

 

Yeah, I've used those plenty of times. Thank you for you help.

Let us know if it works out.

 

Thanks for letting us know about the procedure for loadining 74hc192 with the number.



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