1. Home
  2. General Electronics
  3. I want to make a PIC 16F877 comunicate with a serial PC port. Which crystal or other oscillator to use ?

I want to make a PIC 16F877 comunicate with a serial PC port. Which crystal or other oscillator to use ?

Hi !

I would like to make a PIC 16F877 comunicate with a serial PC port.

I read that some precision oscilator is required for this task : the internal and RC oscilation PIC modes are not suitable.

So, could you recommend me any crystal / ressonator which is cheap an do the trick ? I don't want very fast baud rates ...

Is it simple to interface the oscillator with the PIC ?

Thanks

Reply to
Pedro Duarte
Loading thread data ...

For a realy cheap crystal, a 3.58Mhz color TV crystal with two 22pF cap.

You can interface (almost) directly the PIC with a PC. Most PC serial interface accepts 0 to 5V signals, no need for negative supply or a MAX232. The PIC output is connected through a 100 ohm resistor to the PC. The PIC input through a 2K2 to 10K resistor and two clipping diodes right at the PIC input, preferably two Schottky like 1N5817 or BAT85.

Ron

"Pedro Duarte" a écrit dans le message de news: snipped-for-privacy@4ax.com...

Reply to
Ron

Thanks, Ron !

Reply to
Pedro Duarte

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.