CANADUINO® 60kHz WWVB Atomic Clock Receiver - Compatible with MSF and JJY60

This is a receiver for the WWVB US time signal at 60 kHz. A tiny crystal is provided for the desired signal, depending on your country. This crystal must be very carefully soldered to the circuit board, quickly to avoid damage. The antenna and header pins also require soldering. As noted elsewhere, the PDN pin MUST be grounded to enable the receiver. After soldering, the device was powered up and instantly began recovering the time signal. The ferrite rod antenna is much larger and more sensitive than the similar tiny antennas found in most "Atomic Clocks" - my testing took place at 1500 hrs. in the northeast USA (full daylight)! I highly recommend this device for timeheads.

Packaging was pretty robust - the board and bar antenna were packed securely in a capped, sturdy plastic tube. It just took a tap on the opened end for it to slide out. The device came with printed documentation and usable references to part data if needed.After soldering down a 5-pin breakaway header on the board, I put it down on a breadboard and wired it to an Arduino, and wrote a short test sketch to time the edges on the T pin, and saw the right kind of timings (800ms/200ms etc). This was done on a bench in the man cave/Faraday cage, so that's pretty impressive performance. As a secondary check, I turned on an LF receiver in the shack and verified the pulses lined up with what I heard on WWVB. Looking forward to writing a time decoder for this very slow and very accurate PWM'd bit stream.Remember to pull down the P1 pin to turn on the receiver. It doesn't draw a lot of current (about 50 uA) when it's running, and draws near nothing (0.1uA) when you power it down (by pulling P1 up). The included documentation describes cycling this pin to retrigger the AGC logic to hasten signal acquisition time. You might therefore want to dedicate an Arduino output pin to controlling P1 rather than just grounding it. For my first test, I just grounded P1 and signal was acquired within seconds of power up.Standard shipping is via the Canadian and US Postal system; it took about a week and a half to get here. Seller was really quick to reply on a shipping question. He didn't solicit a review from me, I'm just impressed with this inexpensive, sensitive receiver giving me WWVB on a pin.

Took me 30 min to figure where the crystal goes. Everything else was labeled on the PCB.Then I tried to make it work with an Arduino. The Universal solder points you to a couple outside developers on GitHub. One is useless since he never tested the code with a unit.The other one seems OK, but he won't tell you what pins of the unit go where on the Arduino. Then he integrates it with a segment display that is no longer in production, and impossible to find.Shouldn't the manufacturer develop working code for it?Too bad,

Just picked up from mailbox. Read the three page pdf from their website. Three minutes of soldering. works well.I added a speaker so I can hear the beeps.At 5 volts, uses 7ma approx.

Since the seller begged me to write a review, I'll say that first, the module arrives so tightly wedged tightly in a plastic test tube that there's no way to get it out without breaking its wires. I had to drill a hole in the opposite end of the plastic tube and push it out with a screwdriver. Second, there's neither instructions nor schematic, so it's left to one's imagination how to connect up its its five solder eyelets. I gave it more than one star because its cheap and some folks seem to figure out how to use it. I doubt that i'll ever use mine.

The 100 mm ferrite-rod antenna performs well. I'm nearly 1000 miles NW of WWVB in Ft. Collins CO and this module picks up the signal (with only occasional glitches) around the clock, 24/7 and not just special times at night or dawn/dusk. You should orient the antenna (approximately, nothing precise needed), and keep some distance from metal surfaces and noisy electronics like a cell phone or switching power supplies (eg. any modern wall-wart power supply). Don't know how well the scope photo shows it, but I see about 5 msec RMS timing jitter on the rising edge of the output signal relative to an ovenized 1-PPS reference, in this case around sunset. During the day it's around 10 ms RMS. Obviously this is a long way from single-shot GPS timing but it's pretty small, cheap, doesn't need a sky view, no warmup, and it only draws 43 uA at 3 V running at full power.

EXCELLENT!! This is a kit. You will need some soldering skill and a little more than beginners electronics skill. Do go to the Canaduino website for information on using it. I have uploaded images of the minimum hookup that gets it running. If you connect it as shown (PDN connection grounded) the PDN LED will be off and then a minute or two after you have it connected to power ( 3 to 15 VDC) the OUT LED should begin blinking irregularly (data is coming out). This is a very nice kit and compatible with most Arduinos (the out signal is 3.3 VDC which is fine for 3.3 or 5 V Arduinos). Good Luck!

This unit does work and is small and inexpensive. It does not appear to be as sensitive, however, as the other WWVB clocks we have around although they may just be very clever in how they pull data from a noisy bitstream. (This unit only produces the raw AM demodulated WWVB data leaving interpretation to the user.) Signal is nevertheless very clear at night with careful antenna alignment and we are ~2k miles from the transmitter.