What is it? This is a talking/chiming clock that gets timing information from GPS. It announces the time at the push of a button, and can optionally sound out chimes (Westminster Quarters comes sto...Read More…
This is a talking/chiming clock that gets timing information from GPS. It announces the time at the push of a button, and can optionally sound out chimes (Westminster Quarters comes stock on the clock's µSD card).
The clock has a µSD card slot that contains a card with audio samples that are used to construct the time announcements and chimes. It can chime (when the announcements are muted) by playing audio files on any by-the-minute schedule desired (by default the clock comes programmed with Westminster Quarters every 15 minutes). It has an onboard 1 kHz tone generator that is used to make the ticks and beeps.
There are four DIP switches on the board allowing you to configure up to 8 different time zones (via configuration on the SD card - by default support is included for continental US timezones, plus Alaska and Hawaii and UTC). The clock can be configured to use DST rules for the US, EU, Australia, New Zealand, or no DST. The fourth DIP switch enables or disables the chimes.
The antenna connector is an SMA female jack. By default, it can supply up to 100 mA of 5V active antenna power, but there is a jumper that can be changed to supply 3.3V instead if desired (or opened for no active antenna power).
The accuracy of the clock is limited more by the latency caused by the speed of sound than anything else. In other words, it's as accurate as an aural clock can possibly be.
The clock comes as a board with all surface mount parts assembled and programmed, and with a programmed µSD card. Just install the DIP switch (the sole through-hole part), connect an antenna, speaker, power, and (optionally) add a CR1220 battery.
It can optionally come with a suitable speaker (if you buy the clock as a kit you'll need to supply and solder your own 22 gauge wires to connect it to the board), antenna and/or power supply (3W+ @ 5V, 2.1mm barrel connector, center positive). You can use the on-board button or solder wires to a connector on the board to connect your own. A laser cut wood case (4" x 4" x 2") is also available. If you order the clock with the case, then it will include a button. If you order your clock assembled, then it will be ready to use (just connect an antenna and power).
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Craig | Feb. 28, 2018
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I design and build small, useful electronic things. I started in 2013 after leasing an electric car and deciding that I could build my own charging station. Since then, I've gone on to design lots of things to fill particular needs.
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