Hello,
I have done projects with 7447 single chip led display now i want 5 chip display .
How to this at 12V?
Is pic micro a best options?

 

What are you displaying? Where are the five numbers coming from?
Can't tell if a PIC Micro a best option unless we know what "best" is measured by.

A CMOS 4511 is the same function, and has an operating range of 5 - 15 VDC.

 

The easy answer for doing everything at +12 volts is to use 4000 series CMOS parts. They can work from a Vcc of from +3V to +18V. The LED displays will work from any voltage so long as the current for each segment is limited.

If you meant something else, then you need to state your questions with more precise descriptions.

http://www.ti.com/lit/ds/symlink/cd4511b.pdf

 

Hello
thanks for reply sir
the PLC controller
Will display units on it.
Is any need of bjt switch?
Why tll 74xxx chip not work in high voltages?

 

Hello
which 5 numbers?

 

You could use either of these two driver IC's

 

Hello
thanks for reply sir
the PLC controller
Will display units on it.
Is any need of bjt switch?
Why tll 74xxx chip not work in high voltages?

It was never anticipated that 74xxx chips would need to. Since they are based on current sourcing and sinking they would get a great deal hotter if they ran on 12 volts. At 5 volts, some of them could could fry eggs on a summer's day.

 

In case of cmos they will not heat?

 

Actually, i was doing this with puc micro but it was becomng complicated for 4 digits

 

In case of cmos they will not heat?

No. The reason for this is that CMOS chips consume very little power when they are in a stable high or stable low state. There is some power consumption during switching and this is frequency dependent. In a circuit like a 7 segment display they will spend most of their time in a stable state.

 

Hello
which 5 numbers?

Which 5 chips? I took that to mean five digits...

 

In case of cmos they will not heat?

Not nearly as much because the current flows that are required are tiny compared to TTL, particularly since standard CMOS has effectively no DC current flow requirements.

 

Ok i will check. Today on bread board.

 

No only 4 digits
total 16 wires with gnd with plc for refference so17 wires

 

Can't we do this in less wires

 

Can't we do this in less wires

What is "this"?

You can do it with just two wires (one signal and ground) if you want by communicating from the PLC to the display using something like CAN or other suitable communications protocol.

Whether that is a reasonable option is up to you. What is it you are trying to accomplish and what are your constraints?

 

Hello,
my part is in hardware no PLC programming right now.

 

The LED display circuit using MC14553 and MC14543 on page 7, it can be reach to 6 digits, if you just want 4 digits then you could plus one digit using CD4518 and CD4511.

MC14553 datasheet.

 

Hello,
Is this CD4511
http://www.talkingelectronics.com/ChipDataEbook-1d/html/images/4511-to-Display.gif
after it use uln2803 driver?

 

The 74HC/HCT4511 work in 5V and i will be using above it with uln2803.
The ULn2803 will convert the input 5V to GND
http://thetechnicalbrain.com/electronics/images_stepper/uln2803.jpg