Need to know the time - accurately for your next project?
The code below allows your PIC to log into a network timeserver and it (eventually) writes the time to a Dallas RTC (code not supplied).
The PIC checks the NET TIME every power-up and thereafter every 4 hours. If it doesn't make connection, it tries an alternate time server. If THAT doesn't work (after retries) it gives up and tries again 4 hours later. A Lantronix XPort handles the connection to the net.
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Re: Filtering noise from a wire
The graph at the bottom of page 1 of the LTC4311 shows a total rise-time of about 1uS.
Demon Today, 05:31https://www.analog.com/media/en/technical-documentation/data-sheets/4311fa.pdf
Would a LTC4311 be enough...