Using a GPS’s UTC-synchronised 1PPS signal to drive a relay to flash some LED Xmas tree lights…
Category Archives: GNSS
Setting a 1990s PDA clock via GPS
Setting the time on my 1990s Psion Series 3a PDA via an attached GPS and some OPL code to grab UTC time from the $GPRMC sentence…
ITSF 2022 – mini review
So it’s the Monday after the week before… the week that saw ITSF 2022 happen from 7th-10th Nov in Düsseldorf and I’ve been reflecting on some of the themes & trends that stood out for me over the past week… MCMF (multi-constellation multi-frequency) GNSS receiversThe Sync & Timing community has had access to dual-band receiversContinue reading “ITSF 2022 – mini review”
Tiny clock party – it’s not always about nanoseconds…
A selection of tiny clocks, sync’d a variety of ways – by hand or by (S)NTP/chrony. Featuring Raspberry Pi Pico, ESP32 and micropython.
Magellan GPS 315 vs. The Future – part 2
Some older GPS receivers can’t compute dates properly thanks to the original GPS system employing an epoch with 10-bit week number… a new epoch starts every 1024 weeks!
Magellan GPS 315 vs. The Future – part 1
Comparing a handheld 1990s dedicated GPS receiver with the GNSS chip in a 2019 smartphone
Room 7609 