Pic to max232 to PC - Electronic Circuits Projects Diagrams Free

1Steveo · 25th January 2005, 02:20 AM

I'm trying to get a Pic to send a serial "Hello world" to my pc using Hyperterm, But not having any luck! Do I have the MAX232 wired right?

Steve

DigiTan · 25th January 2005, 03:02 AM

My success with MAX232 has been a little limited lately, but I noticed the T2OUT line is tied to the serieal port in the diagram. The TTL signals on this line are probably falling under RS-232's noise margin and be rejected by the PC. But quote me on that, because I'm no expert on RS-232. signaling.

Good luck on the circuit! And let us know how it goes. (I'm trying to do something like this soon too).

pumpi · 25th January 2005, 06:00 AM

have a look at this demo bord....
u can goto google and just type picmicro+rs232 and u can find more info.

samcheetah · 25th January 2005, 08:10 AM

check Nigel's RS-232 tutorial

http://www.winpicprog.co.uk/pic_tutorial7.htm

ZERS · 28th January 2005, 10:58 AM

error

ops:

Jerran · 31st January 2005, 06:06 PM

Try taking the RS-232 out of the circuit and see if its your software or the chip. Use a 22K resistor between your input pin on the pic and pin 3(if your using a 9 pin connector) of your connector and a 1K resistor between your output pin on the pic and pin 2 of your connector.

Ive had better luck with hyper-terminal communications not using a rs-232 myself.

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25th January 2005, 02:20 AM	#1
1Steveo	Pic to max232 to PC I'm trying to get a Pic to send a serial "Hello world" to my pc using Hyperterm, But not having any luck! Do I have the MAX232 wired right? Steve Attached Thumbnails

25th January 2005, 03:02 AM	#2
DigiTan	My success with MAX232 has been a little limited lately, but I noticed the T2OUT line is tied to the serieal port in the diagram. The TTL signals on this line are probably falling under RS-232's noise margin and be rejected by the PC. But quote me on that, because I'm no expert on RS-232. signaling. Good luck on the circuit! And let us know how it goes. (I'm trying to do something like this soon too). __________________ The most-hated young engineer in America. * AVR Projects * Robot War: TI * About

25th January 2005, 06:00 AM	#3
pumpi	pic to rs232 have a look at this demo bord.... u can goto google and just type picmicro+rs232 and u can find more info. Attached Thumbnails

25th January 2005, 08:10 AM	#4
samcheetah	check Nigel's RS-232 tutorial http://www.winpicprog.co.uk/pic_tutorial7.htm

28th January 2005, 10:58 AM	#5
ZERS	error ops: __________________ It\'s better to burn out than to fade away

31st January 2005, 06:06 PM	#6
Jerran	Try taking the RS-232 out of the circuit and see if its your software or the chip. Use a 22K resistor between your input pin on the pic and pin 3(if your using a 9 pin connector) of your connector and a 1K resistor between your output pin on the pic and pin 2 of your connector. Ive had better luck with hyper-terminal communications not using a rs-232 myself.