I did this successfully a few years ago using an AVR 90S8535 to generate
IRIG B so that I could use a vintage nixie IRIG display with a Trimble
Lassen IQ GPS receiver that spoke NMEA IIRC.
I used one of the counters in the AVR to generate the 1 KHz carrier, read
the serial output of the receiver with the USART in the AVR, translated it
and generated a binary IRIG code to modulate the carrier by switching the
bottom of a resistive divider up and down.
It wasn't too hard as I recall, and I was much less experienced in AVR
programming in those days.
Morris
Date: Mon, 23 Jun 2014 12:26:40 -0400
From: Bob Bownes <[email protected]>
To: Discussion of precise time and frequency measurement
<[email protected]>
Subject: [time-nuts] microcontroller based IRIG generator
Message-ID:
<CACsYtUsmAdz_08+Z8sHEh=koPuCkko263ijh3HkA89yz=b0...@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
I remember a few discussions over the last few years about building a
microcontroller (PIC, Arduino, MPS430, whatever floats your boat) based
IRIG generator. Did anyone ever get one working?
Thanks!
Bob
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
