GPS Clock

Name: GPS Clock
SKU: 8604
Price: 159.99 USD
Availability: InStock
Rating: 4.67 (27 reviews)

(27 Reviews)

An LED desk clock that gets time from GPS

Designed by Geppetto Electronics in United States of America

2019-11-09T19:28:47.664Z-B7BFB6A1-6E41-483F-B6AA-6EAA4D0CD1FB..jpeg

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An LED desk clock that gets time from GPS

What is it? This is a GNSS (GPS, Galileo, GLONASS & BeiDou) driven LED display desk clock. It is configurable (with buttons on the back) for almost any timezone (half-hour timezones are not supported…

What is it?

This is a GNSS (GPS, Galileo, GLONASS & BeiDou) driven LED display desk clock. It is configurable (with buttons on the back) for almost any timezone (half-hour timezones are not supported) worldwide as well as for daylight savings time rules for the U.S., E.U., Australia or New Zealand (or DST off). The clock can display 24 hour time (00-23 hours) or 12 hour time with AM/PM LEDs. The display has colons between the two-digit groups for hour, minute and second that can be on, off or blinking at 1/2 Hz. The display brightness can also be adjusted (to any of 4 steps). The display consists of hour, minute and seconds as .56" red seven segment LEDs, and a .3" tenth-of-a-second digit. The display is multiplexed with a refresh rate of approximately 10 kHz. The accuracy of the display is within 200 µs of GPS time. Those two factors make it suitable for such things as time-stamping slow motion video. The board has a clip for an optional CR1220 coin cell on it to retain the satellite almanac without power.

It (optionally) comes with (or in) a 3D printed plastic and acrylic case and (optionally) with an AC power supply (90-240 VAC, 50/60 Hz, North American plug). A GPS antenna is required and an active magnetic-mount "puck" antenna is optionally available. The GPS antenna connector is SMA and supplies 3.3 VDC power for active antennas (up to 100 mA). An active antenna mounted outdoors with about 27 dBi gain and a <1 dB noise figure is recommended.

It is available either fully assembled and tested or as a "quick kit," with or without the case and power supply (5 VDC @ 250 mA, 2.1mm barrel connector, center positive). The "quick kit" means that all of the surface mount components are installed and programmed, leaving you to install the through-hole parts and assemble the case (if applicable).

What makes it special?

This is absolutely the most accurate human-readable clock for the price that I know how to make. It's a handsome and functional conversation piece for anyone interested in time.

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Review Breakdown

Average Ratings

Product: (4.89)

Documentation: (4.26)

Shipping: (4.85)

Communication: (4.67)

William | May 24, 2024

GPS Adds Game Changing Capability to Consumer Timekeeping

Over the years, the tech toys that engage the casual time-keeping enthusiast have evolved from 60Hz AC clocks to the revolutionary Heathkit GC-1000 shortwave-disciplined digital clocks to the current crop of 60kHz VLF-disciplined clocks. Displayed time accuracy in sync with shortwave standard time broadcasts has been a gratifying accomplishment to the Time Geek in many of us. The next r/evolution is here with the Geppetto GPS clocks! Instead of a synchronization process that may take several minutes, the Geppetto GPS clock is already synchronized the instant the time is displayed. After an initial process of accumulating the almanac of GPS constellation data, the time is displayed with superb accuracy. Just like listening to shortwave time signals, you instantly know The Time at your location, no guessing about whether your clock is synchronized to a shortwave or VLF source. With GPS as your reference, you don't have propagation issues; there is the occasional "no GPS" notification when the constellation and your antenna placement isn't optimal, but that is rare. There is a display setting to guide you for the best antenna placement, and a multitude of display options for everyone's taste. Several options are offered for the clocks, such as GPS antenna and custom housing. If you are a time enthusiast looking for a no-compromise digital chronometer, you should check the devices offered at Geppetto Electronics. -BW

Al | Dec. 1, 2021

Nick Sayer is a seriously talented designer/builder

I got the version with the blue display - because I work on computer screens with the lighting dimmed - and got the "full-meal-deal" (complete kit). What a joy to simply plug it in an go! Initially I noticed that the ":" (colon character) separating the hrs/minutes/seconds were too bright - but soon found an option to disable them. Perfect. Easy to setup - no manual required. I highly recommend this product to anyone - even someone minimally technical. I ordered additional products and all were shipped the same day and arrived in a single package, much sooner than expected. Wow - everything was in stock and ready to go. Great customer service - imagine that. Thanks for a 10 out-of-10 customer experience.

Åke | May 9, 2021

GPS clock in Sweden

My clock works fine. I bought a new GPS antenna to receive extra satellites (e.g GLONASS). In northern Sweden we often find that it is good to have GPS antenna with ability to capacity to catch many satellites. Otherwise I am very pleased.

Response from Geppetto Electronics | May 9, 2021

Unfortunately, the SkyTraq timing module does not support GLONASS or any other non-GPS satellites (it does support GPS WAAS systems, where they are available).

Tom | Dec. 27, 2020

What is your time worth? Good exchange of money for time!

If you are technically savvy, you'll like this clock. It's easy to set up. I used my own antenna and a spare 5V wall wart. It took 5mins or so to sync when first started. I got the blue led version for personal reasons. I have other GPS time keeping gizmo's on my desk. This clock gives me a visual display of the time that everyone is chiming to. I will probably purchase another unit and set it to UTC. They should look pretty good stacked.

Takafumi | Oct. 7, 2020

Great kits! Perfect functionality.

These are great kits. I have both V3 and V6. I actually might buy a few more. PCBs and parts are of great quality and functionality is perfectly implemented. GPS is super sensitive and locks very quickly. Customer service is great, too. I ended up with a defective LED. He overnighted it! Quite impressive and very much appreciated.

I have one installed as an independent clock, and the other one is used as timing source for an NTP server. It is working wonderfully.

An only thing I wish is if I can get SMA connectors and power connectors uninstalled. As designed and installed, they stick out from each side limiting casing options. I have a desoldering station, so I removed them and replaced them with right angle type.

Not mentioned specifically anywhere is that V6 can use battery for backup. It's a small CR1220 type. I imagine it is storing survey data for GPS. Works fine without but will take a while to lock as it has to survey every time. It was a super-cap on V3, I believe....

Jonathan | July 11, 2020

Best clock ever.

Excellent build. Absolutely love this clock. I’m incredibly impressed with the quality and accuracy. Might even get a second one for dad.

Steve | April 30, 2020

GPS Clock works great

Assembly went pretty quickly and I found a good GPS lock for the antenna on a window sill. For me it's useful that the antenna lead and the power cord are located on the sides as that allows placement in a shallow area. Assembly instructions are online only but are pretty descriptive. A couple of assembly pictures would be nice.

Thomas | Jan. 28, 2020

Antenna placement is important.

The GPS clock has to continuously receive the signals from the satellites in order to continuously display the time. I tried putting the antenna in a south facing window and the clock showed the time about 80% of the time. I expect that the fact that my house has aluminum siding was causing problems as that would block the signal from many of the satellites. I bought an extension cable for the antenna intending to put the antenna on the roof. But a friend suggested that I try putting the antenna up on the second floor or perhaps in the attic. With the antenna on the second floor about 3 feet above the floor the clock showed the time about 95% of the time. With the antenna in the attic the clock shows the time 100% of the time.
I bought my clock in kit form and had no problem building it. But I have worked as an electronic technician. If you have no experience soldering parts to a circuit board then you should probably buy it already assembled.
The antenna specifies that it wants 3.3 volts for power but my clock came setup to supply 5 volts. This does not seem to cause any problems but I re-jumpered it to supply 3.3 volts.

Andrew | July 23, 2019

Nice little clock does what it is supposed to do.

I asked questions before I placed the order for a clock. The seller was nice to answe all of them.
I placed the order on Sunday night. I received it on Tuesday morning. The seller and I are next county neighbors (25 miles away).
First of all, I am no electronic wizard. My knowledge about electronic are high schiool level. I have never done any soldering in my life. I don't know circuitry. I am able to plug in the power and the GPS antenna. The same kind of skill to set up the "over the air" TV broadcast signal.
I waited for about five minutes, and 'No GPS' disappeared. The clock runs as it is supposed to be with HH MM SS s.
I was able to use the two buttons on the back of the clock to adjust display brightness, set time zone (UTC off set). I did not read the documetation and still be able to figure it out on my own.
The size of the digit is about right. I think it is a little bit higher than 0.56 inch tall.
I am surprised that this unit only consumes 0.075 Amp at the peak.

Brian | June 3, 2019

This is the best high-accuracy clock you can buy

If you own fine watches and want to be able to truly know what their accuracy is then you need a high accuracy time source that you can trust 100%. Unless you can afford to have your own atomic clock (not a radio sync clock that syncs to WWVB - those drift over the 24 hours that elapses between syncs) then you can't do better than this GPS clock.

This clock is showing you the time signal from a GPS satellite (which has an actual atomic clock onboard) in real time. It doesn't sync to the atomic clock, it displays the real time atomic clock data. If you don't have a GPS signal then it doesn't show the time. If the clock is showing time, then you're looking at live data.

I LOVE the tenths of a second. I can take a photograph of my precision timepiece (watch) in front of the GPS clock and compare the watch to the GPS clock, with the tenths of a second allowing for even sub-second measures of accuracy. There are other GPS clocks out there (like high accuracy time sources to be installed on a network) but they only display whole seconds. Those are useless for my purposes.

I was so frustrated at trying to find a high accuracy clock that shows tenths of a second that I was going to undertake building my own. I'm glad I found this one first. It saved me a ton of time and I have no doubt that the product Gepetto is selling is better than anything I would have achieved no matter how much time I put into it.

I'm sure there are other uses for this besides using as an error free reference for precision timepieces, but if you are an owner of such watches I can't see how you can live without one of these clocks.

Does it seem like I love mine? Yes. Yes I do. :-)

Robert | March 27, 2019

Great clock: Can I use as timer?

I love this clock, especially the tenth-second display. But reading it in real time isn't really possible so I video record it and read back in slow motion to time an audio cue. Pretty awkward. Is there a way I could freeze the display with a relay contact closure or equivalent? My application is measuring the performance of an antique clock. It produces a strike on the half hour that I'm using to gauge its accuracy. Do I really need tenth-second resolution for that, you might ask? Well, I'm getting results as good as 3 seconds per week. Pretty gross, I know, but this is 1890 era technology. (Actually, some were way better than this one.) Thanks
Robert Harrington, Vista, CA

Jim | Jan. 8, 2019

This is the BEST GPS clock kit I've seen!

This review pertains to V3.1, which is what is being shipped as of the review date. A new version in in the works. I bought the 'quick kit' and used my own 5V power supply, GPS antenna, and case.

OK, the BEST, but not perfect. First, the GOOD stuff. Nick has taken the care and time to get a LOT of details right. The clock does Daylight Saving Time (and this is not a simple matter with a GPS clock). The displayed time is not just synchronized to the NMEA message from the GPS receiver, but actually uses the GPS PPS signal to advance the seconds (I have another maker's GPS clock that doesn't use the PPS signal, so it has an error of a few tenths of a second - not a huge deal, but not right either). And this clock has tenths of a second. Honestly we all know that's totally pointless for practical purposes, but I wanted it anyway (you do too, I know...).

The user interface is simple to use and intuitive. So, setting the time zone, display brightness, colon mode (off, on, or flashing), tenths digit, and a couple other settings is fast and easy.

Here's what I found that I'd improve, were it my product. On the V3.1, the AM/PM and colons flicker annoyingly at a rapid rate ( a few Hz, coincident with the tenths digit count -the flicker goes away if you only use max brightness). Nick is aware of this, because I returned a model so he could see it himself. I was able to fix it on my clock by adding a 33k resistor from the AM/PM LEDs to ground. Nick and I both spent a fair amount of time pondering this issue, and agree it arises from fact that the Maxim LED driver chip is driving different style of LEDs (0.56" 7-segment, 0.3" 7-segment, T1-3/4, and T1). The Maxim chip is being designed out in the next version, as I understand it, so this issue will be moot at some point.

The LEDs are bright. Too bright in a bedroom, for example, and the dimmest setting is still too bright, at least for me. It'd be nice if there were more range available in the dimmed settings.

The connectors stick out the left and right side of the PCB, which means the cords that plug into them are visible. IMO, having them exit toward the back would be better.

The GPS antenna needs to be mounted where it has a clear sky view. If you plan to keep the GPS antenna indoors, you might find (as I did) frequent 'NO GPS' being displayed. I design RF circuits, including embedded GPS for a living, and I think it'd be possible to get better GPS sensitivity, at least based on comparison to GPS that I've used in other devices. GPS is very sensitive to on-board noise, and I think the switching power supply and Maxim LED driver might be pushing some noise into the receiver or antenna bias line, though I have not investigated this in much detail. The good news is that the micro in the clock just needs a UART line that contains some common NMEA message - I patched in a NEO-6M, and it worked fine, so you're not stuck using the GPS implementation on the board.

If the PCB was smaller, particularly in width, it'd allow more case choices. There's about 3/4" inch to the left and right of the display that forces the case to be wider than needed. Similarly, the display in not centered vertically. Not a big deal, but if you like symmetry you need to offset the board and use an otherwise- oversized case.

The AM/PM LEDs are useless, IMO. I removed mine.

So, there's the good and bad, as I see it...

Bottom line: Would I buy another one? Yep - I already did! As I mentioned, there's nothing better in a GPS clock kit.

Allan | Dec. 19, 2018

Great little clock, interesting circuit

I would imagine this could be combined with the broadcast time signal to automate daylight savings as well. In any case my only gripe was the need to run back to the web to get instructions. Even a slip of paper or a mark on the rear containing a link to a PDF manual would be appreciated.

Response from Geppetto Electronics | June 29, 2019

The firmware will do DST correction with the current rules from the EU, USA, Australia and New Zealand. If any of those rules change in the future, then it is possible to perform a field firmware update.

Allan | Sept. 24, 2018

Great GPS Clock

I purchased the assembled clock circuit board without the case as I wanted to install it into a Hammond Translucent Plastic Case ( the largest one fits perfectly ) so I could install power and GPS antenna connectors on the back ( the power and gps antenna connectors are mounted on the sides of the circuit board so their matching plugs exit the sides of the case nick provides ) and not have any screws heads protruding from the front of the case. I purchased black m3x10mm screws to replace the silver screws that come with the case so they would not be noticeable. Since the screw heads are countersunk into the case front and are farther away from the clock display than those surface mounted heads on the case nick provides, they are not as noticeable and for me make the case and display seem cleaner.
Understand, I’m not bashing or disparaging the case nick sells. It’s considerably smaller than the Hammond case, has AM and PM markings on the front and is considerably less expensive than the Hammond case itself not even including all of the associated hardware, plugs and connectors I needed to complete the installation. It just didn’t fit my aesthetic sensibilities.
Because the Hammond case wouldn’t have the AM and PM markings engraved on the case as does the case Nick provides, I decided to replace the Red PM LED with an orange one. I contacted Nick who replied that he would assemble the circuit board but not install the AM & PM LEDs but would include them so I could install whatever LEDs that looked best.
Nick promptly assembled and shipped my clock. After trying a number of different led color combinations and viewing them through the Hammond Red Case so I would know exactly how they would look I chose a Red LED for AM and an orange ( Amber ) LED for PM.
I purchased a back for the case nick sells from nick to use as a drilling guide for the mounting screws for the circuit board and using it drilled the four mounting holes and the two holes for the setting switches into the back of the case. Nick even offered to refund the cost of the back after I used it to drill the holes if I returned it to him undamaged !!.
I then drilled an 8mm hole for the 1.5x5.5mm power socket in the back of the case below the circuit board and soldered a matching right angle power plug cable to the socket since both the power and gps sockets on the circuit board are mounted on the sides.
I drilled a 1/4” hole in the case back for a 4” right angle SMA male to a right angle sma female bulkhead Cable I got on eBay and mounted the bulkhead connector into the case.
I mounted a 4-40 x 1-1/2” threaded standoff/spacer into each of the 4 holes I drilled into the case back. I then plugged in the right angle power plug cable I attached to the matching jack I installed in the case back and the male right angle sma connector on the 4” cable which is attached to the female right angle sma bulkhead connector also mounted to the case back
( because of limited clearance the connectors need to be mounted to the circuit board before it is attached to the standoffs/spacers ).
I then attached the circuit board to the spacers, attached the front of the case to the case body and attached the active gps antenna and the power supply I got from nick to the power jack and female sma jacks I installed on the case back.
The clock started right up and synced the time to the gps satellites within a minute.
The clock looks and works great and Nick was great to work with.

Larry | April 29, 2018

Excellent Clock

I've bought three of these GPS Clocks through three design generations. All have worked, providing GPS-accurate time with the desirable and interesting tenth-second time display, much like the old Heathkit GC-1000 Most Accurate Clock from 1987. I especially like the red LED 7-segment displays, which are easily read. The latest generation with HH MM and SS digit separation and optional colons, and with (somewhat limited duration) super-capacitor storage for GPS data, is my favorite. The wood case is a bit tricky to assemble but works ok, with an effective smoky-gray filter window. I added a right-angle SMA adapter so the antenna cable exits rearward. I have two Most Accurate Clocks and I found the tenth-second digits of these Heathkit clocks and that of the GPS Clock roll over simultaneously, even when seen video recorded at 8X speed; I find that interesting and enjoyable! My clocks are deep inside by house, which has radiant-barrier (think of it a giant aluminum foil umbrella) thermal insulation so I use a GPS antenna located on my roof. The current clock design allows a choice between 3.3 and 5.0 vdc to feed the GPS antenna, allowing the use of more-common, remote-located GPS antennas. The current third-generation clock design has moved the GPS Sync LED to the rear of the circuit board, where it no longer distracts from the time display. What would I like beyond this Generation 3 design? Perhaps more control to dim the displays and longer storage of GPS data when not powered. As in all good products, the designer, Nick Sayer, has listened and has evolved the design to enhance the features and performance. This GPS Clock is highly recommended!

Richard | March 21, 2018

Great Clock Kit

This is a GPS clock kit with high quality parts. It was easy to build because the surface mount components were preinstalled. There were clear instructions for construction and set up was easy. The nice feature is the time is always correct and doesn't need to be set. Time is displayed to the tenth of a second. The only negative is if GPS signal is not present tube clock displays no GPS and doesn't keep time until it acquires a signal. It has an external antenna that has a long cord for mounting outside. With this I have always had signal. It comes with a case. In all a great kit.

Randy | Feb. 8, 2018

I love this clock

This is a cool clock. I am glad I found it. I’ve been looking for an accurate clock for under my TV, and you can’t beat GPS. I looked for a digital clock that uses WWVB, but did not find one I liked. In addition, WWVB reception inside my house is spotty. Speaking of reception, GPS reception in my TV room was not 100%, which was what I expected. I solved that by placing the GPS antenna in the attic, and that works perfectly (outside was not necessary). Some dark stain for the wood and black paint for the hardware make the case look great. I did find the lowest brightness setting still too bright for watching TV in a dark room. I solved that in a low-tech way with tinted tape over the displays. Maybe some day I will take a crack changing the software to do that. A cool addition (hint hint) would be to use something like a photoresistor to change the brightness with the room light, but that would add cost and complexity.

Arthur | Dec. 31, 2017

Very basic electronics skill required.

A very simple project and well documented. I have only very basic electronics skill and manage to solder the parts correctly within half an hour.
I live in an apartment and mounted the antenna just outside my windows. Cold start is around 20 minutes.

Julian | Dec. 20, 2017

Works Great

It displays time if it locks to GPS signal. However when no GPS signal is present, it does not display time but a "No GPS" message. It would have been better to continue to display time with a note that there is no GPS.

Response from Geppetto Electronics | Dec. 20, 2017

This concept is called “holdover” and I wrote a project log about it on the project page: https://hackaday.io/project/18501-gps-clock/log/70091-whither-holdover

Richard | Nov. 30, 2017

GPS clock with lots of options

Works wonderfully.

Took a short time to assemble since the surface mount devices were already in place in the kit. My old eyes thank you!
Both AM/PM LEDs have clear markings on orientation. Had to go to the schematics to ensure that the colons LEDs had the same orientation (They do!)
If you click the documentation window all needed information is there including code on Github and Hackaday for future modifications you might want to make.
Programming and changing programs will be easy since the ports are already there to do it. Just need to solder connector pins when needed.

Could not ask for anything more from this. Hope I'll get emails when there are upgrades done in the future.

Highly recommended.

Cheers.

Response from Geppetto Electronics | Nov. 30, 2017

Thank you for your kind words!

In lieu of soldering a connector on the programming header, you can also use a pogo pin adapter. I happen to sell one...

William | June 5, 2017

Nice kit, works great

Easy to assemble kit. Had an issue with one of the 7 segment displays, emailed the seller and he replied immediately even though after hours. Had a replacement part in the mail that day. Great product, can't beat the service!

James | June 1, 2017

GPS Clock - a GREAT addition to my amateur radio shack

All of the controlled clocks in my home are of the Atomic clock variety that receive a signal from WWVB on 60 kHz from Fort Collins, Colorado: https://www.nist.gov/pml/time-and-frequency-division/radio-stations/wwvb . I live in SC, so the only way I can reliably sync them is to move them to the Western side of my house near a window at night, which I do weekly. It is wonderful to have a clock where I just need to place the GPS puck outside my window, and be assured of the 100 ms accuracy every split-second of the day. I purchased the clock fully assembled. It's options allow customization of the clock in terms of LED intensity, Time Zone, Daylight Savings Time, 12 vs 24 hr, display of the tenth's of seconds display, and more. There is no significant documentation provided in the package, but it is on the Tindie website. Setup is fairly intuitive, though. No communication was necessary between me and the seller. Shipping was very prompt, and packaging was good. I realize that this began as a very simple project, but it definitely has a permanent place in my ham shack. - 73 de JIM N2ZZ

Response from Geppetto Electronics | June 1, 2017

Thank you for your kind words!

I do have to point out that I've had to revise the specifications of the clock's accuracy down to 200 µs instead of 100 µs. The code in the interrupt handler for the PPS took longer than I had estimated, but the 200 µs figure is the worst-case accuracy measurement.

David | May 22, 2017

Very good and excellent support from the developer.

I built the clock from the kit, and put it into the supplied enclosure. It went together easily and worked first time. Anyone who has done any soldering before will have no trouble fitting the parts with a bit of care.

I had a couple of questions and contacted the developer who was able to advise me very promptly.

I bought the GPS antenna and it picks up the signal in an upstairs room with only a couple of small roof lights. I have seen it lose signal only a couple of times, presumably because of a particularly bad position of the satellite constellation at that time. If it was critical I could position the antenna outside.

Due to a leap second update added recently, the clock is 2 seconds fast for approx 5 minutes, before it downloads the correction details, and then it is exactly correct.

The developer is now revising the design to include a backup super capacitor to store the correction so that if there is a short power interruption, the clock will not have to wait for the leap second correction.

The LED clock display is bright and easily seen in full sunshine, and can be dimmed if you wish. The separators between H,M,S are decimal points, not colons which would have been nicer.

The case is laser cut wood and can be painted, or stained as the developer suggested to me. I may do that. Black stain with the dark red acrylic front would look very good I feel.

One other wish would have been for the antenna and power connections to have been on the rear rather on opposite sides, it would improve the appearance and make it easier to place beside other equipment on a shelf.

The software is well thought out, giving all the options I require - Timezone, DST, 12/24hr, tenths of a second on or off, brightness control.

The flashing LED for GPS fix is annoying, and not necessary, so I fitted the LED on the rear and can only see it through the hole beside the antenna socket now. New boards will have a small LED on the rear as standard. It isn't needed at all as the clock displays NO GPS while it is unlocked anyway.

I bought a small linear plug top 5V power supply for the unit, but it turned out to be unregulated and the voltage was too high as the load was so low, it caused no damage fortunately. I fitted a small 5 V linear regulator and that cured the problem. I would advise buying a proper 5V regulated supply, the one supplied from the developer would be fine I presume, I did not buy one because I was unsure if it would have a UK plug and used switched mode regulator which I am wary of because of potential RF noise issues.

I have noticed no RF interference or RF immunity problems at all with the clock, which is important to me in my ham radio station.

The buttons for setting it are on the rear and require something like a paper clip to press them, fortunately they are mainly set and forget.

The price is very reasonable, especially if you are in the USA, however if you live in the U.K. be aware you will pay VAT and handling charges which adds quite a bit to the total. It is still a good deal I feel.

Response from Geppetto Electronics | May 24, 2017

Thank you so much for your kind words.

The version now in the store has colons between the H, M and S digits and (as mentioned) the super-cap to preserve the almanac over brief (up to around 3/4 hr) power interruptions. Newer units also now have an SMD "FIX" LED mounted on the component (back) side (visible through the antenna hole).

The power supply available for purchase with the unit is a switching supply that accepts 90-240 VAC 50/60 Hz, but has a North American plug. A passive plug adapter would be sufficient for world-wide use. Alternatively, any 2W @ 5 VDC supply with a 2.1mm center-positive barrel connector would work.

John | April 13, 2017

GPS Clock

This is a great clock.
I bought mine allready prebuilt.
It looks and works great.
Clocks buffs, Ham radio Guys, SWL's, buy this clock. You'll like it.

Lars | Feb. 23, 2017

LOVE the clock

This is a quality design/build and something sexy to add to the ham/work bench. The ONLY change would be to add a firmware setting to disable the heartbeat led from being displayed, easily resolved with with a soldering iron or black electrical tape applied directly to LED for reduced illumination but... The tenth of second digit reminds me of my old Heathkit most accurate clock that gave many years of wonderful service. It's amazing how one gets attached to something. Spence - NS3F

Response from Geppetto Electronics | Feb. 23, 2017

Thank you very much for your kind words. Another option for the FIX LED is to mount it on the component side of the board. It wouldn't be visible through the front panel, but you could check on it when desired by peeking in from the side or perhaps drilling an auxiliary hole in the back panel.

Steven | Feb. 10, 2017

I just love this GPS clock

I am very happy with this GPS that I bought two. The unit is very well made and there was little assembly required. Great little accessory to have in your hamschack.

Thomas | Feb. 6, 2017

Great Clock

I think that your clock is Great. You lost my order, but I'ii forgive you if design a clock with a 1.5" numerals with your basic clock. Maybe someday design the clock with Grand father clock time chimes in clock