Message 27605 in ASTRO.WW
From: KO6NMZ
Date: Sat, 08 Aug 26 23:26:00 Z
Newsgroups: ASTRO.WW
Subject: Celestial Navigation
Message-ID: <TJH532KO6NMZ>
Path: N2MH4|N3HYM|KA3VSP|N3MEL|KQ6UP|KO6NMZ
R:260809/0456Z 35121@N2MH4.#SENC.NC.USA.NOAM LinBPQ6.0.24
R:260809/0456Z 12455@N3HYM.#FRDK.MD.USA.NOAM BPQ6.0.25
R:260809/0455Z 6080@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260809/0454Z 23624@N3MEL.#EPA.PA.USA.NOAM LinBPQ6.0.25
R:260808/2327Z 12274@KQ6UP.#SCA.CA.USA.NOAM BPQ6.0.25
R:260808/2326z @:KO6NMZ.#SCA.CA.USA.NOAM [Grand Terrace] DP6.15 $:TJH532KO6NMZ
From: KO6NMZ @ KO6NMZ.#SCA.CA.USA.NOAM (Maria)
To: ASTRO @ WW
I just wrote a program for a little Arduino board (a tiny computer on a
chip). This little project has its own screen and allows you to enter a
sextant shot via rotary encoders to generate a Lat/Long fix. The computer
sets the clock on shore via a Wi-Fi connection to an NTP server. That time
gets stored in an RTC (clock chip) that has its own battery. This is the
only Arduino project like this that I am aware of. There are cards for the
HP48 calculator that do this, but I wanted a small, stand-alone unit.
I have breadboarded this, and it works, but there is also a simulation of
it here:
[https://wokwi.com/projects/471829116081713153](https://wokwi.com/projects/4718
Maybe someone would be interested in this, so I thought I would share it
here. Future versions will have a clock offset table to autocorrect RTC
drift. It would also be neat to have an Arduino that can sync to WWV.
-73 de Chris KQ6UP
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