[time-nuts] Mains Frequency Monitor with the PIC 16F1619

Daniel Watson watsondaniel3 at gmail.com
Mon Jun 20 20:41:40 EDT 2016

Hi all,

Responding to a few comments:

- The DC-DC converter has the same pinout as a 7805. It would be possible
to substitute the linear regulator (as long as you handle the power
dissipation of course).

- I will likely switch to I2C for the LCD on the next revision.

- Adding an input for an external 10MHz reference signal would not be a
problem. I would also add a jumper for selecting the clock, and a disable
jumper for the TCXO.

The 16F1619 has an on-board 4x PLL, but the maximum operating frequency of
the chip is 32MHz... An 8MHz external reference would be ideal, but of
course not very common.



On Mon, Jun 20, 2016 at 12:48 AM, Mark Sims <holrum at hotmail.com> wrote:

> I would recommend dumping that DC-DC converter and going with a simple
> 3-terminal regulator (or at least adding an option for it).  It seems it
> would be a lot cheaper and easier for people to source the parts for it.
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