OHSEN RED LED WRISTWATCH
Ohsen Red LED Wristwatch, retail $16.49
Manufactured by Ohsen (www.ohsen.com)
Last updated 01-30-12




I've only reviewed three watches prior to this, so please bear with me here.

You might remember LED wristwatches from the 1970s, heck, you might still have one.

The Ohsen is an LED watch that features a large display comprised of seven-segment LED "readouts"
It displays time in either 12 hour (regular AM/PM time) or 24 hour (military) format.

It can display the time & date like other digital watches, it also displays seconds if you require that feature, and it has a plastic band.


SIZE

This picture shows the watch on my wrist, like it's supposed to be worn.



The LED wristwatch comes ready to use right out of the box. You may need to set the hour to the time zone you're in, and set the date as well - but is otherwise ready to go right away.

The wristband is a standard plastic buckle type; fasten it to your wrist & adjust the size much as you would use a belt on your pants.

To read the time, press & release the button on the upper right once. The time will be displayed for three seconds, and then automatically extinguish.

To read the date, press & release the button on the upper right twice in fairly quick succession. The date will be displayed for three seconds, and then automatically extinguish.

To read the seconds, press & release the button on the upper right three times in fairly quick succession. The seconds will be displayed for three seconds, and then automatically extinguish.


To set the watch, activate the time display by pressing & releasing the upper right button, then press & release the lower right button.

The watch will show the hours & minutes; the hours value will be flashing. Press the upper right button to change the hours value from 00 to 12. You may hold this button in to rapidly advance the hours value if desired.

Press the lower button once to cause the minutes value to flash. Press the upper button to change the minutes value from 00 to 59. You may hold this button in to rapidly advance the minutes value if desired.

Press the lower button once more to get the month & date on the screen - the "month" value will flash. Press the upper button to change it from 1 to 12; you may hold the button down to rapidly advance it.

Press the lower button once more to get the date value to flash. Press the upper button to advance the date from 1 to 31. You may hold this button in to rapidly advance the month value if desired.

Press the lower button to cause the year value to be displayed; press the upper button one or more times to get the year to change from 2000 to 2049. You may hold this button in to rapidly advance the year value if desired.

Press the lower button yet once more to cause the indicator to display "12hr" or "24hr"; press the upper button to toggle the two.

Finally, press the lower button again to finish up and turn your watch's display off.



It is not stated how the battery should be changed, so I don't have instructions for performing a battery change.

The watch uses a CR2032 lithium coin cell.

(Update 03-31-10) Out of necessity, I figured out how to change the battery...start by using a sharp-edged instrument such as a sturdy knife, and carefully pry the back plate off. Carry it to a...O WAIT!!! I MEAN set it aside.

On the back of the watch, you'll see a CR2032 lithium coin cell held in place by what appear to be small black plastic clips that appear built into the black plastic watch casing. Using the same knife (you did choose one with a sharp point, right?), carefully pry the used cell up, starting on the edge of the cell that looks held in place with two tiny plastic tits. Push toward the opposite side with the knife blade as you're gently prying the old cell up.

EXCERSIZE EXTREME CAUTION!!!!!!! The knife you need to use has a very sharp blade and point; you don't want to accidentally stab or slash yourself the wrong way and subsequently become worm food here!!!

Once the cell pops out, carefully lift it away and set it aside (you'll see why I didn't advise you to dispose of the old cell shortly).

Insert a new CR2032 cell into the chamber, orienting it so that its flat-side (+) positive faces up, and gently press down on it until it snaps into place.

If you quickly look at the watch face now, it should indicate "12:00" before going back out within several seconds.

On the old cell, you'll see a black foam disc stuck to its flat side. Carefully peel it off, and stick it to the center of the new cell. NOW you may dispose of or recycle the old cell as you see fit.

Snap the back plate of the watch on, pressing down firmly on all of its edges so that it doesn't just summarily fall off later on.

Set the time and date to the correct values.
There, you're finished.





Because this is a watch and not a flashlight, I won't try to flush it down the potty, stomp on it with old or used bowling "shooz", viciously throw it at a wall or in the bathtub, smack it against a steel rod, run over it with my Celebrity motorised wheelchair, or perform other potentially destructive tests on it that might be performed on a flashlight.

I did attempt to cut through the crystal (top window that protects the LED display) with the blade of a folding knife, and I was not successful.
This tells me that the crystal is made of glass (almost certainly mineral glass), not acrylic, polycarbonate, or other plastic.
Would I really try to cut up the crystal of a brand spanken new wristwatch I paid perfectly good money for?
You bet your sugar-coated toliet muscle (sweet patootie) I would, if it's in the name of science.

I also used the shower with this watch on, and noted no leakage or malfunctions.
It reads "WATER RESIST" on the crystal, which is why I attempted to use it in the shower in the first place.

As a wristwatch, I think it's quite nice. And to see real live LEDs in it, that's even better. I love LEDs and things made with them, and this watch is no exception



A picture showing the watch displaying the time (7:09am).




Photograph of the watch displaying the date April 2.
Note that there are no leading zeros like many other digital watches display.


Spectrographic analysis
Spectrographic analysis of the LEDs in this wristwatch.
USB2000 spectrometer graciously donated by P.L.





This is a video on YourTube showing how the "seconds" display can be kept on for more than three seconds.

This clip is approximately 6.13346567421 megabytes (6,377,300 bytes) in length; dial-up users please be aware.
It will take no less than thirty one minutes to load at 48.0Kbps.




This video on YourTube shows how my Ohsen Red LED Wristwatch has eaten it. The leaf switch controlling the upper right button became busted; the watch can now no longer be set.

This video is approximately 6.26457734002 megabytes (6,458,784 bytes) in length; dial-up users please be aware.
It will take no less than thirty one minutes to load at 48.0Kbps.

I cannot provide these videos in other formats, so please do not ask.



TEST NOTES:
Test unit was purchased on Ebay on 01-29-09, and was received on the afternoon of 02-05-09.

Product was made in China. A product's country of origin really does matter to some people, which is why I published it on this web page.


UPDATE: 04-25-09
This is a photograph of the watch displaying the date April 20.



The significance of "420" is to users of "maryjane" (pot, grass, tea, ganja, Maui Wowee, Matanuska Thunder{vulgar term for intercourse}, green stuff, marihuana (yes, spelled with an "h" and not a "j"), whacky tobacco, cannibis, reefer, etc.).


UPDATE: 08-04-09
This is a photograph of the watch displaying the time "5:55".



"555" is a very common timer IC (integrated circuit) chip.


UPDATE: 09-13-09
The back plate has fallen off, and I have no idea where it is.
I took the watch off to use the shower yesterday morning, and when I went to put it back on afterward, I noticed that it looked a little funny. It did not take me long to realise that it looked queer because the back plate was missing.

As a result, the dreadful "Failed or was destroyed during/after testing" icon will appear next to its listings until or if I find this part.


UPDATE: 03-22-10
I found the back plate to this watch when I moved the bed to vacume under it on 03-20-10; therefore, that dreadful "Failed or was destroyed during/after testing" icon will be removed.


UPDATE: 03-31-10
I figured it out!
I figured out how to change the battery!!
I figured out Blue Clues!!!

Please see the "Feeding Time" section farther up this web page for the instructions!


UPDATE: 09-21-10
I added a photograph of the watch displaying "8:08" -- a very common laser wavelength (in nanometers) generated by the pump diode in DPSS (Diode Pumped Solid State) lasers, such as found in those common 532nm green laser pointers.





UPDATE: 10-03-10
I know many of you might consider this a piddly little thing, but one of the two loops that hold the watchband in place broke and fell off a couple of days ago. This does not affect the overall functionality of the watch, but I felt it necessary to do an update about.


UPDATE: 01-06-11
The band snapped at 10:23am PST on 01-04-11 (or "04 Jan 2011" or even "Jan 04 Twenty Double Sticks" if you prefer.
Let's show you with a photograph:


Note that there is a second location on the band that would be next to become broken as well if it didn't fail here first.

In light of this failure (the watch can no longer be used as intended!), I have little choise but to issue the dreadful "Failed or was destroyed during/after testing" icon and append it next to its listings on this website.


UPDATE: 01-06-11
No, you aren't seeing things.
Yes, a same-day update.
I used the band from this wristwatch to repair this one.
It fits my wrist somewhat loosely, but it does do the job.

Therefore, the dreadful "Failed or was destroyed during/after testing" icon will be replaced with the slightly less dreadful "" icon, denoting that the product is missing a component (the band in this case), but is still functional. Shortly thereafter, I replaced that band with the one from the Digibeat Blue LED Wristwatch, which went down the tube in May 2010.


Here is a photograph of the watch with that band in place.


UPDATE: 01-23-11
The metal contact for the switch button that you press to read the time, date, and seconds has become busted. Although I can still read the time by pressing the upper left button, the date and seconds are inaccessible; and I don't know how one would reset the watch for DST or after a battery change after this. Therefore, that dreadful "Failed or was destroyed during/after testing" icon will be appended to its listings on this website.

Actually, in just attempting to do so, I was able to successfully set the time & date on this watch; even though the date can no longer be accessed for viewing.


UPDATE: 02-14-11
Although I can *ACCESS* the time & date set mode on this watch, I am not actually able to *SET* it, as the video that I made which is shown above displays rather vividly.


UPDATE: 02-15-11
I have effected a TEMPORARY repair (and the word "temporary" is rather strongly emphasised here!) to this watch that will allow me to set the time & date when the need arises -- such as after changing the battery. This repair was conducted using a small piece of kitchen aluminum foil. Since the foil is not that "springy" and will deform quite readily, I'll still use the upper left button to read this watch unless I need to know the date and/or display seconds.


UPDATE: 01-30-12
I have successfully changed the battery; it only took a couple of minutes from start to finish this time.





    MANUFACTURER: Ohsen
    PRODUCT TYPE: LED digital wristwatch
    LAMP TYPE: Red LED (seven segment-type LEDs)
    No. OF LAMPS: 31 (discrete LEDs)
    BEAM TYPE: N/A
    SWITCH TYPE: Momentary pushbuttons for setting time, and date
    CASE MATERIAL: Stainless steel body, mineral glass crystal, plastic band
    BEZEL: Mineral glass crystal (window) protects LED display
    BATTERY: 1x CR2032 lithium
    CURRENT CONSUMPTION: Unknown/unable to measure
    WATER- AND PEE-RESISTANT: Yes
    SUBMERSIBLE: Yes, to 3ATM
    ACCESSORIES: 1x CR2032 cell
    WARRANTY: Unknown/not stated

    PRODUCT RATING:

    Because this product is not intended to emit
    light, the standard "star" rating will not be used.





Red LED Wristwatch *






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