Casio W800H Countdown Timer Mod

Casio W800H is a great watch! But it can be better... For unknown reasons countdown timer is factory disabled on 3240 module used in W800H. Luckily masterminds of the internet figured how to hack the watch to its full potential.
In addition I slipped a color filter in there to make it more personal. Overall, Casio W80H is great. Maybe a little ugly but functional, especially with countdown timer mod. Enjoy!
Watch is for sale:
ebay.us/YVu3Jz?cmpnId=5338273189
Winner to last weeks giveaway is @keenanjts!
Visit my Etsy shop:
www.etsy.com/shop/WildTechsas
Casio W800H:
(US) amzn.to/2ytX3mc
(UK) amzn.to/3c2vwXN
Screwdriver set:
(US) amzn.to/2IJex1R
(UK) amzn.to/2UHJ6qj
Cutting Mat:
(US) amzn.to/2IZZRee
(UK) amzn.to/2XMKUjI
Xiaomi Wiha Screwdriver set:
(US) amzn.to/2R9myka
(UK) amzn.to/2qiPNGe
Music by Back to 84:
thmatc.co/?l=ED0A28FE
backto84.bandcamp.com/
/ backto84
Follow me:
/ bytechsas
Support my broke ass on Patreon:
/ techsas

[@BT84]

Thank you for featuring my music in your videos! I'm a fan of your channel btw. Great watches and mods ♥

[@Techsas]

Hey! No worries, I love your music!

[@MyOtheHedgeFox]

...That’s it? Just scratch off that one solder blob and that’s it?! Holy guacamolё, that’s the only thing I need to make my favorite watch even more favoriter?!? Now that’s an amazing discovery. Will try it as soon as I can. Thank you so very much for this.

[@Techsas]

Yes that's it haha

[@sargera1]

Can we just get it off using blower

[@rexyoda]

What what's the point of disabling it in the first place then

[@Shrek_Has_Covid19]

they make more money by selling the same watch without the solder and saying its a premium feature

[@dubjon5134]

​@@rexyoda I guess they want people to buy one of the uglier cousins, F201WA for example

[@simonbollard9836]

I was a bit sceptical about the countdown timer mod and in my first attempt it didn’t work. I built up the courage to take the module apart and got it another go and second time around it worked. A really useful mod thank you so much

[@manuelcastillo585]

You just remove the crome and works?

[@caror0]

Thank you for the helpful video! I wanted a classic Casio watch w/ countdown timer for running and pomodoro and this seems like a great mod!

[@Techsas]

Thanks!

[@kato223]

Looks great! I also just enabled the 5 alarms on mine. I thought I wouldn't like it, but I love it since you can set any of the 5 for everyday, everyday in a month, a specific date in a month and or for 1 single day of the year. I learned though that only alarm 1 will show the ALM and SNZ if enabled. The other 4 alarms will not. However, figuring them out if they are on or off is quite easy. When you hold in the adjust button on any of the alarms, it enables the alarm only. Then exit the alarm set and only the alarm will be on. Then press the ADJUST button 2 more times to turn off that alarm. It is annoying at a quick glance that you can't see that they are enabled, but with the buttons that way it is easy enough to figure out.

[@Wasserverschmutzung]

Just did that to my W800H and it works with no problem! Thank you!

[@sezwo5774]

Is there a beep and the end of countdown or it silent? Thanks.

[@Wasserverschmutzung]

@@sezwo5774 yes, there is. It's really cool mod.

[@grandriver3152]

Just did it myself. Works as described.

[@mattiataccori6487]

Thank you for this video! I was waiting for it and now I can do the same mod in my w800h. Nice work as always!

[@Techsas]

Thanks!

[@manuelcastillo585]

You just remove the crome and it works?

[@sped6954]

I picked up another one of these a couple days ago at Walmart, a gray one with a black band. Just decided a little while ago to mod that one as well, but after getting the whole thing torn down, lol I couldn't for the life of me remember which of the solders to eliminate, so I came back for a refresher course, and this time I scraped away enough of it to make it work the first time. Total working time from the time I started removing the springbars for the bands to having it completed and with the bands back on? Well under 15 minutes. Now I'm not sure which of them I like better... probably the gray one. Great tutorial and thanks for posting this mod that changes everything for this watch.

[@mikesims6638]

Awesome! Thanks man! I've been trying to figure out how to get a timer on this watch since I got it. Just didn't make sense that it didn't have one. Works like a charm! Interesting how after the timer expires, it automatically repeats...

[@Techsas]

Glad I could help!

[@s.h.v.c2865]

Nice mod techsas, sometimes simple is best. I was considering this mod when looking for a casio with a timer but I ended up getting the F-201WA which already has a timer and is a slimmer watch (barely larger than an F-91W)

[@Techsas]

F201 is great choice!

[@s.h.v.c2865]

So great there's not much to mod!

[@0hleg]

Well problem with that watch is it doesn’t tell time and display timer does it? This one does both which not a lot of Casio watches do

[@s.h.v.c2865]

@@0hleg true, that’s is a good feature I wish it had, alongside showing the home time in the dual time screen.

[@Shvmadogg]

I was always afraid to damage the WR by opening the back plate. Could it affect the WR telling by your experience?

[@Tyle_smalcu]

That orange screen is gorgeous!

[@Techsas]

Thanks!

[@wagt3634]

I am looking for a simple watch that would also give the possibility to set seconds in the timer mode (not only hours and minutes), can you help?

[@mmv1503]

if you don't need double time and want something smaller, you can go for W-202/B640/(w-720 looks like casio :) but not sold any more) with 3294 (1846) module

[@Techsas]

Thanks for the info!

[@alvinpillay9995]

I did it and it works. Thanks.

[@Techsas]

Welcome to the club!

[@lctrstone8302]

Do you know that you can add five alarm mod also, but instead of removing the solder you have to add it under the two contact that already soldered in right middle of the circuit which is the third contact. I did that to my Casio W-96H which is has the same circuit as W800H.

[@zamSEG]

hello sir, may i know which part of the board that it need to be soldered? did you mean instead of removing the solder, it must be soldered to the other circuit, which one?

[@lctrstone8302]

@@zamSEG OK let's say that we have the circuit, we're going to work on the side where the processor exist, and let's make the LED on the left bottom. now you can see that there are five contacts arranged in the right side of the circuit some of them are already soldered, you can add five alarm mod by adding some solder in the middle .

[@zamSEG]

@@lctrstone8302 duly noted. thank you for the tips. i'll try it later and update about the outcome. thank you very much sir and have a nice day.

[@stonehill27]

I did it on W800H. But changed back to original. You can't see if alarm 2-5 are active or not on W800H . Yes, you can test and learn if alarm 2-5 are active or not by pressing adjust button, but not for me.

[@Mo-gi2xf]

@@zamSEG did it work?

[@andresmorales6723]

Just Amazing, it works perfectly, thanks 👍👍👍

[@BosunM8James]

Does anyone know if that countdown timer hack works on the casio a178?

[@EDNILSONRELOGIOS]

Good Morning. I would like to know that "sticker" is the one that you pasted on the watch's LCD, I wanted to do an experience like that too. a big hug here from Brazil rio de janeiro 😉

[@Techsas]

It's Rosco Color filter

[@unzulaessig]

What for an foil is it? I want to try it out by myself!

[@johnfordcoleyleyson243]

can you try that in casio f91w or a168? countdown timer

[@DiegoCamarero]

so, is the countdown timer function hack as easy as removing that solder?

[@teogonzalez8921]

Beautiful!!!

[@Techsas]

Thanks!

[@shnlynwdg220]

I have a casio w800H that now i know what to do....interior is much more complicated than i expected

[@Techsas]

It is. Make sure you put it back the right way

[@fbekakc144]

Hi, great video mate! I was wondering if the mod affects the water resistance of the watch? My watch comes in the mail on Tuesday and I'm super excited, just need to be able to use it in water. Also I read about an issue where the alarm won't sound, does the alarm still go off after this mod?

[@Techsas]

Thanks! If you put everything back together as it was the I don't see why would that effect water resistance. Alarm is working as it was just don't loose that little spring at 1:15 when you are putting it back together.

[@100Rumpelstiltskin]

How about 3234 module from A178w? I need a countdown timer.

[@noah8554]

Where did you get that sheet of filters?

[@EffendiChung]

Been wondering where to get these filter films. What are they called and if any brands you would recommend.

[@Techsas]

Rosco Color

[@monkelover2056]

How do you do it on casio a158

[@kukicata46]

Nice video! Soldering one of the pins you can also add the 5 alarm feature. The only cons. Is that on the other 4 you don't see if are activated or not (and the snz does not work for that 4 alarms)

[@glaurung78]

It is so with many casios that have 5 alarms: only the first one has the snooze feature

[@zamSEG]

to enable countdown timer it need to remove that solder pin and may i know which one of the pins that need to be solder? is that right, or need to solder the countdown with the other pin?

[@kukicata46]

@@zamSEG I don't remember what pin you have to solder. I found it on a forum

[@thepenultimateninja5797]

@@zamSEG Here's a link to a blog post with an explanation of what the various solder points do: ianrrees.github.io/2019/09/13/casio-w-800h-extras.html You can do the following: Enable countdown timer Enable 5 alarms Disable dual time function

[@and_rew9768]

Well done 🥇

[@wailfaridi2070]

Wow that's quite a nice thing for people with that module. Do you know off anything like this on other more popular casios like the f91w and the a168 series?

[@Techsas]

No, I haven't seen anyone do something like that on other model.

[@mluij]

@@Techsas Actually there is a way to do such a modification on an A500WEA-1EF

[@zabdielalvarez5285]

WOWOWOWOWWOWOWOOW!!!!! THANKS BRO. GREAT WORK

[@Techsas]

You're welcome!

[@cekpi7]

I read this somewhere but didn't believe, thanks for doing this video :) Are there any bugs or glitches after enabling it? It doesn't make sense why would they disable it.

[@Techsas]

No bugs or glitches. I thing it's disabled because they want people to buy more expensive watch with the same module where it's enabled.

[@stonehill27]

I did this today on almost new watch. Works very good, haven't found any faults after procedure. Thanks for instructions! I suggest using a loupe and take your time.

[@gabrielcornea9119]

no glitch, works perfectly. just be careful not to burn the main board while you're changing the jumpers

[@keith4288]

Great video and love your channel! There was a tiny spring that came out when carrying out this mod, any idea where it came from?! The countdown timer has been enabled but I've got no beep on alarm or timer...

[@Techsas]

Thanks! Tiny spring goes into a module, you can see it in 1:15. Without it sounds don't work.

[@sezwo5774]

@@Techsas So if this mod is done properly there will be a beep at end of countdown?

[@zamSEG]

@@sezwo5774 yes, please do keep it in safe place and not losing it. the spring need to be contacted to the piezo speaker at the backcase to beep. if you've already lost it, it can be mod by using some wire strain, but it's quite tedious, time consuming and lots of patience.

[@ethand4784]

friggin nice video to wake up to dude, does it beep when it reaches 0 like the alarm?

[@Techsas]

It does!

[@algren1368]

Funciona bien el truco, solo debes dividir la soldadura con un desarmador delgado, gracias por el video me ayudo mucho, desde Mexico

[@laluciernagagrifa]

OYE MAN NO TE PASOQEU AL HACKEARLO SE LE BORRARON LAS LINEAS DE SEPARACION EN LA PANTALLA Y DESAPARECIO LOS SIMBOLOS DE ALARMA SIG Y SNOOS?

[@manuelcastillo585]

​@@laluciernagagrifa a ti te pasó?

[@laluciernagagrifa]

@@manuelcastillo585 Simon, todo jala bien pero se borraron todos las señales

[@manuelcastillo585]

@@laluciernagagrifa entonces no funciona jajaja

[@DeadliestEvil]

god watching him scrape that solder off just hurt, get a soldering iron and do it right.

[@zilvinasbaskys7194]

I have don't have a soldering iron just like I don't have any fucks to give

[@hsrojasd1]

This is great, I just have one question, does the timer works for seconds or just minutes and hours? Thanks!

[@SeanFlaherty]

Just minutes and hours.

[@blackvolga7]

Hello! A bit of a noob question, but what is that black thing on the circuit board?

[@Techsas]

no idea, must be some black magic

[@blackvolga7]

@@Techsas...

[@zamSEG]

if not mistaken it is some sort of foam protection sticker/padding between lcd and the board.

[@docnele]

Under that insulation pad is probably the "blob" that covers controller chip which contains the bulk of the watch (beside the display itself). Note that the chip does not have the case, but is just insulated with a blob of hard resin.

[@bachtrantrung9902]

How about 3224 module from W 218? I need a countdown timer.

[@Techsas]

Never tried. Can't tell if it's going to work.

[@teogonzalez8921]

greetings from Argentina!!!!

[@Techsas]

Heyyy

[@focalpolyglass7337]

My W800H is on 3092 module, will this mod work on 3092 module?

[@Techsas]

Yes, it should work.

[@focalpolyglass7337]

Thanks techsas

[@mbnv99234]

I’ve done this mod on two of my W800H watches. While it works, sometimes when I press and hold “adjust” to reset the time, or set an alarm, the “beep” goes faint and resets itself. Not all the time, but often enough where it’s an issue having to reset the watch almost every other time I set an alarm or every other time I have to press and hold the adjust button. Both my W800H watches do this. Does anyone know what I did wrong ?

[@SeanFlaherty]

Maybe the spring that enables the sound is not in the optimal position? Also, I think the sticker on the battery has to be in a correct position so that the only continuity contact is from the spring.

[@mbnv99234]

@@SeanFlaherty good thoughts. Just double checked and the spring , as well as the sticker that goes over the battery are both fine on both W800 watches that I have. So, no idea what’s causing this.

[@sped6954]

I couldn't get it to work on mine. I tore it down three or four times thinking I may not have completely severed the connection, but no dice. After reassembly, everything else still works how it's supposed to, just no countdown timer. EDIT: 6/10/2021 After breaking it all back down a few days ago, I kind of lost interest and put everything into a small plastic storage box, and left it on my nightstand. About a half hour ago, I looked at it and got interested again, I finished breaking the module down, scraping solder, reassembling the module, nothing, break the module down again, more scraping, reassemble, nothing, break it down a third time, told it that if it didn't unlock my countdown timer this time, I was going to scavenge all of its universal stuff like screws, battery, pushers, clips, etc, and the rest was going in the trash. This time I got overly aggressive with the screwdriver that I was scraping with, and I felt a very noticeable click while I was scraping and decided that this was probably as good a place as any to stop. I reassembled the module, popped the battery back in, locked it down, shorted the AC terminal to ground, pressed the mode button twice and there it was... TR in the upper left corner. Then I put the module back into the case, put the cover on, and pressed the MODE button a few times to make sure I still had noise. Project complete, timer unlocked. One weird thing I noticed while everything was apart... The back cover says it has Module 3240, the spider clip that holds the module together says 3238 in its upper left position by the Casio logo, after the module was completely disassembled, the side of the PCB that faces inward said it was Module 3239, and after everything was reassembled, the three button Casio legitimizing test says it's Module 3233. Anyone have any thoughts on this? What Module does this thing actually have? I've seen this before on a few of my others where the cover says one thing, but the three button Casio test says something else. This is my first time actually disassembling a module, so I don't have much of a basis for comparison. Regardless of what everything else says, and I'm sure some would argue this point against me... I don't really care much what any of the printed items say, but the one thing that's actually permanently programmed into the watch's memory is 3233, so that's what I'm going with.

[@the_depressionist_]

Great mod, thanks! 👍 Hmm...for some reasons, after watching this vid i got a strong desire to watch Miami Vice...🤔

[@Techsas]

Then my mission is complete!

[@the_depressionist_]

😄👍

[@connorprice5611]

What’s the perks of adding the film over the display?

[@pingapong64]

To personalize it.

[@sediqkhan8353]

\Can you please explain Why would the company deliberately remove a feature?

[@Mo-gi2xf]

He doesnt answer

[@tynungester2543]

Where do you get your polarizing film?

[@Techsas]

It's color filter not a polarizing film. It's called Roscolux color gels, you can find them on ebay.

[@sterby1]

Did you hear of this new invention called the "soldering iron"?

[@Orangelemonblue]

Help!! So I just did this and I now have the Countdown function but it's doesn't make any noise when the timer is complete and reaches zero. Anybody else? Any tips?

[@zilvinasbaskys7194]

You probably lost a little spring that goes in the back of the module. If that doesn't touch the backplate it doesn't beep.

[@Orangelemonblue]

Yups, you're right, luckily I was able to just take a spring from an old casio I dont use anymore and put it in this new one...thx ✌️

[@davisssamuel]

Where do you buy the films for the color filter mod?

[@Techsas]

Ebay. Look for Rosco Color Swatch book

[@frog5mack]

Watched this, 5 minutes later I have the timer I wanted, thank you

[@Techsas]

@@frog5mack Happy to help!

[@SkibidiWaPaPaPaPa]

What was the name of the color in the Rosco Color Swatch book?

[@suegere]

cool

[@khulgarulfsson8067]

Considering how prominently countdown timers have been featured in 80s movies, it’s a little strange they aren’t standard on Casios.

[@akorkmaz074]

can the dual time be turned off?

[@Techsas]

Possibly

[@pukayfly1]

thanks now i can use my watch full potential

[@djizzah]

so why didnt casio just leave the function on this model?

[@Techsas]

So people buy more expensive one with this function enabled

[@Shrek_Has_Covid19]

the answer is always money.

[@isaacdominguez1385]

No entendí , porque desarmo todo, solo para ponerle el plástico rojo,

[@SENGVIN]

Where does that litte spring go lol?

[@Techsas]

They have a tendency to escape...

[@sped6954]

If you look at the white plastic piece, and try to keep it oriented correctly, there will be a tiny hole near the top left corner. On the metal frame that clips the module together, on the top row it says UP(+). The hole directly below UP(+) is where the spring goes. The spring is actually not the same in both ends. One end flares out just slightly and has to be installed on the inside face of the module, so when you go to put everything back together, the spring will be captive in the module and won't be lost when you remove the back cover to change the battery. Some people just drop it down inside the module as the last step before putting the cover back on, which is wrong because it makes it too easy to lose it on future battery replacements.

[@caicucing]

thats why al qaeda love casio watches. Haha

[@ShihabdeentheCyclist]

Is this possible in casio f91w

[@Mo-gi2xf]

No because another model(module) inside

[@kaeking86]

I have the same filters

[@luisferreira7845]

Nice video! I remove the solder but didn't work!

[@user-se3yj9hv3p]

Работает. Ура

[@philknight8808]

im not sure of what he accomplished??? and niether d i think lt was necessary?????

[@sixty502]

He enabled a countdown timer feature that is factory disabled

[@efisiotocco1628]

I activated the 5 alarms😉

[@wittner82]

7:31 now it's a little bit glitched

[@JS-cg3ir]

FYI: This doen't work on the Casio W-218H models, there are no jumpers.

[@electron7659]

Casio dislikes this video........ 🤔 Well.........okay........I'll be honest....🙄 Casio HATES this video. 🤭 But we the "watchers" like, approve and appreciate it. Thanks 😉

[@grahamwishart4832]

No need to remove strap

[@serhandogan4366]

There was no need to disassemble that much for the job done.

[@rodriguezg6999]

2077 🌎🌎🌎🌎🌎🌎

[@maboleth]

You could just unsolder it, much cleaner... smh.

[@totsamiyokomtimectala]

Это что за мастер который отвертку не может держать??🤦🏻‍♂️

[@tbonemoon1330]

Why are you wearing gloves? Lol Edit: never mind, I see why now

[@Techsas]

Fingerprints

[@manuelcastillo585]

Alguien ya intentó y funcionó?