Basic Serial Port Circuit - Electronic Circuits Projects Diagrams Free

grudge · 17th April 2003, 12:34 PM

I'm pretty new to electronics but I want to learn and I'm still busy getting to the basics. I'm busy doing a project at home, but I need some kind of remote control for the pc. I was thinking of an IR remote control, but I'll maybe do that later. What I Basically want to build, is some kind of circuit with a few press buttons, this circuit is then connected to the serial port on my pc. Depending on which button you press it sends a certain signal(bit ?) to the serial port. The programming part on the pc, receiving the signal I'll prob be able to do, but the circuit is something which I don't know how to do...

Any ideas ?

**mechie** · 17th April 2003, 05:23 PM

What you need to interface with the serial port is :-

A voltage level shifter from RS232 +/-12v to logic +5v (maybe a MAX232 chip)

A UART (universal Asynchronous Recieve/Transmit) - I would have suggestsed a 6402 for this but they have gone obsolite! I guess you now need to consider a microcontroller with an integral UART such as the PIC16CR63.

The rest is just programming.

Mosfet · 18th April 2003, 02:34 AM

Best tutorial I know is 'Serial Port Complete' by Jan Axelson
http://www.lvr.com/serport.htm Her site has many links.
http://www.ziplabel.com/cir/index.html The link you want.

grudge · 18th April 2003, 06:43 AM

Quote:

Originally Posted by mechie

What you need to interface with the serial port is :-

A voltage level shifter from RS232 +/-12v to logic +5v (maybe a MAX232 chip)

A UART (universal Asynchronous Recieve/Transmit) - I would have suggestsed a 6402 for this but they have gone obsolite! I guess you now need to consider a microcontroller with an integral UART such as the PIC16CR63.

The rest is just programming.

Do you maybe have a circuit for that ? I'm not sure how one would do that..

**kinjalgp** · 18th April 2003, 12:03 PM

Look at this page for basic idea:
http://www.digitalnemesis.com/ash/pr...vo/default.htm

If this is not what you want search for "PIC serial port" in www.google.com

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17th April 2003, 12:34 PM	(permalink)
grudge	Basic Serial Port Circuit I'm pretty new to electronics but I want to learn and I'm still busy getting to the basics. I'm busy doing a project at home, but I need some kind of remote control for the pc. I was thinking of an IR remote control, but I'll maybe do that later. What I Basically want to build, is some kind of circuit with a few press buttons, this circuit is then connected to the serial port on my pc. Depending on which button you press it sends a certain signal(bit ?) to the serial port. The programming part on the pc, receiving the signal I'll prob be able to do, but the circuit is something which I don't know how to do... Any ideas ? __________________ -- \"...3 days without programming and life becomes meaningless...\"

17th April 2003, 05:23 PM	(permalink)
mechie	Serial Comms What you need to interface with the serial port is :- A voltage level shifter from RS232 +/-12v to logic +5v (maybe a MAX232 chip) A UART (universal Asynchronous Recieve/Transmit) - I would have suggestsed a 6402 for this but they have gone obsolite! I guess you now need to consider a microcontroller with an integral UART such as the PIC16CR63. The rest is just programming. __________________ I need a memory upgrade ... My head is full !

18th April 2003, 02:34 AM	(permalink)
Mosfet	Best tutorial I know is 'Serial Port Complete' by Jan Axelson http://www.lvr.com/serport.htm Her site has many links. http://www.ziplabel.com/cir/index.html The link you want.

18th April 2003, 12:03 PM	(permalink)
kinjalgp	Look at this page for basic idea: http://www.digitalnemesis.com/ash/pr...vo/default.htm If this is not what you want search for "PIC serial port" in www.google.com __________________ "There is no way to peace, peace is the way!"