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I wanna get 5V -> 24V SCH File...

 
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NewSpace



Joined: 23 Sep 2003
Posts: 12
Location: South KOREA

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I wanna get 5V -> 24V SCH File...
PostPosted: Fri Dec 03, 2004 2:27 am     Reply with quote
Dear All.

Hello? Thank you about read my topic.

I'm korean ....

I use PIC16F874

I wanna Know How to control 24V

For Example...

24V In -> 5V Level (Micom...

5V Level (Micom) -> 24V Out...

I think Use PC817...

But I don't know about it...

Can you teach me...

If you have Sch file then May I get it...


newspacekor@yahoo.co.kr

Thank you very much~!
_________________
Hello~?

This is South KOREA
My name is Sanghyouk Kim But Call me Nick
Sorry I'm poor English
Mark



Joined: 07 Sep 2003
Posts: 2838
Location: Atlanta, GA

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PostPosted: Fri Dec 03, 2004 11:33 am     Reply with quote
Quote:
24V In -> 5V Level (Micom...


You could use a voltage divider for this. I would put a zener on there just in case.

Quote:
5V Level (Micom) -> 24V Out...

Depends on what you are trying to do. There are chips that will do this or it could be as simple driving an open collector transistor.
Humberto



Joined: 08 Sep 2003
Posts: 1215
Location: Buenos Aires, La Reina del Plata

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PostPosted: Fri Dec 03, 2004 5:12 pm     Reply with quote
Quote:

24V In -> 5V Level (Micom...

5V Level (Micom) -> 24V Out...

I think Use PC817...


If PC817 is an optocoupler as I guess you are in the right track.

For 24V Inp you will need:
- In the diode side of the PC817
a series resistor of 2K2 (2200 Ohms).
- In the transistor side of the PC817,
Emitter to GND.
Collector to +5V level through a 10K resistor.

Do this arrangement for every Inp you need and then connect every
PC817 Collector to PIC.

Quote:


5V Level (Micom) -> 24V Out...



If with this you mean how to control something of 24 from my
Microcontroller running at 5V, one of the answer is:
Use a driver array like ULN2003.

Hope I have had a good translation fron korean to spanglish Very Happy
AND you understand the idea.

Best wishes,

Humberto
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