Re: [time-nuts] microcontroller based IRIG generator
I went about obtaining a solution in a round about way in building a GOES satellite simulator that drives a truetime DC468 rcvr. It has IRIG B outputs. I do like the displays on the truetime rcvrs. Just pulled the unit out as I believe the gps rcvr may have an issue as noted on other threads. If true, time (Pun intended) to convert to a $21 ublox. Paul WB8TSL On Wed, Jun 25, 2014 at 5:17 AM, Morris Odell wrote: > 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 >> To: Discussion of precise time and frequency measurement >> >> Subject: [time-nuts] microcontroller based IRIG generator >> Message-ID: >> > 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 -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] microcontroller based IRIG generator
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 To: Discussion of precise time and frequency measurement Subject: [time-nuts] microcontroller based IRIG generator Message-ID: 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 -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] microcontroller based IRIG generator
> 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? There is a C source code file in the NTP distribution to generate IRIG via a sound card IIRC... That might be a good stepping stone if nobody has already come up with something packaged already. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] microcontroller based IRIG generator
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 -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
