PIC Prototyping board…

PIC Prototyping board…

B0j3 posted up a nice protoboard in the MAKE Instructables group – “Since I have a lot of ideas about different usages of microcontrollers it always happens I have to build basic microcontroller setup (microcontroller with oscilator). Finaly I decided to make a small (or should I say mini) protoboard for PIC 12f675 (which I wanted to use for a small project).”Link.

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8 thoughts on “PIC Prototyping board…

  1. Oracle1729 says:

    Nice idea, but since it’s for prototyping, I can see no reason you’d use the 12F675 here. A larger chip with more I/O makes more sense.

    The 12f675 has an internal 4 MHz RC oscillator. The only time you would need an external crystal oscilator is when the 1% precsion on the internal RC isn’t good enough. Considering the chip only has 6 I/O lines, this would leave you with 4 of which only 3 work as outputs.

  2. japroach says:

    I always wonder why more people dont do this…

    I did the same thing with a at90s2313 which has no internal oscillator. The main reason though is because it was a SOIC part..

  3. cheesy says:

    And what’s the point of using a board when you’re just plugging it into a breadboard, why not plug the microcontroller directly into the breadboard? That’s what I do.

    The only reason I would understand were if the microcontroller were only available in surface mount packages, but most (all?) PICs and many other microcontrollers are available in DIP packages.

  4. K27 says:

    Heh. Now that you mention it, I’m starting to believe I agree with you, Cheesy. I think a better idea would be a mini pcb for the crystal and caps that fits into a solderless breadboard…

    Still, you would need a pretty good reason to forgo the internal oscillator, which can be set from a few Khz to 8 Mhz. Using a third of your I/O pins for an external clock limits things a bit.

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