Shower timer

once again i turn here for advice, thank you in advance

so the idea is to make a shower timer that lets water run after a button push for 6 mins with a buzzer that sound after 5 mins alerting the user to hurry up. after this it will shut off for 10 mins before reactivating and waiting for another button push.

parts needed

-12v solenoid 1/2" water fitting -relay module 5v trigger -Arduino nano -momentary waterproof switch - 4x 18650 cradle - step down module 14v-9v - 5v buzzer - waterproof project box - waterproof male female connector

Firstly i am going to bypass the solenoid valve in the event of failure or battery dying but nobody else in the house knows what a ball valve is so there is no danger of them thinking that through. All i want to know is am i going the correct way about this as i have seen post on here regarding similar things but its not quite how i want it. I was also thinking about incorporating a charge circuit so it can be unplugged from the solenoid valve and charged overnight. would the code for this be something say a beginner could do if i study it hard for a week or so.

Don't run any electricity into the shower. Not even from an adapter. Use a battery if you must do this. Even if you have a waterproof switch, this is no environment for a do it yourself project. I'm pretty sure it violates code, so it will probably invalidate your insurance.

What are the implications of bypassing the solenoid valve? Why would you need to know or not know what it is? You lost me.

... and why are you doing all this? Why? Aren't showers a good thing? If you want to save money or energy or something, wouldn't an honour system work?

All such schemes I have seen and used have the electrical part in the dressing room before you go into the shower. Are you only giving cold water showers or only hot water showers? You mention only a single solenoid.

What country are you in? In America, all states now have laws requiring showers to be operated with a single control that begins at cold and gets warmer as you continue to turn the control. There is also a requirement that a heat sensitive part must be incorporated to limit the temperature of the shower water.

Paul

aarg: Don't run any electricity into the shower. Not even from an adapter. Use a battery if you must do this. Even if you have a waterproof switch, this is no environment for a do it yourself project. I'm pretty sure it violates code, so it will probably invalidate your insurance.

What are the implications of bypassing the solenoid valve? Why would you need to know or not know what it is? You lost me.

... and why are you doing all this? Why? Aren't showers a good thing? If you want to save money or energy or something, wouldn't an honour system work?

so basically my hot water never burns anyone i have a thermostatic mixer valve under the shower that is set at 1 temp all the time all you have to do to have a shower is turn the mixer all the way to hot and shower so the solenoid would be on the hot side only. I am in the uk and insurance is not an issue. electricity wise it will be placed outside of the shower its only waterproof as a precaution. i doubt it will ever get wet where i am placing it.

You should consider adding one of these to your parts list.
In general, and this is what I heard first from a old factory manager: Never forbid or prevent something because it just causes you trouble. Just make it difficult or expensive.arduino_coin_meter.jpg

cobisby:
once again i turn here for advice, thank you in advance

so the idea is to make a shower timer that lets water run after a button push for 6 mins with a buzzer that sound after 5 mins alerting the user to hurry up. after this it will shut off for 10 mins before reactivating and waiting for another button push.

parts needed

-12v solenoid 1/2" water fitting
-relay module 5v trigger
-Arduino nano
-momentary waterproof switch

  • 4x 18650 cradle
  • step down module 14v-9v
  • 5v buzzer
  • waterproof project box
  • waterproof male female connector

Firstly i am going to bypass the solenoid valve in the event of failure or battery dying but nobody else in the house knows what a ball valve is so there is no danger of them thinking that through. All i want to know is am i going the correct way about this as i have seen post on here regarding similar things but its not quite how i want it. I was also thinking about incorporating a charge circuit so it can be unplugged from the solenoid valve and charged overnight. would the code for this be something say a beginner could do if i study it hard for a week or so.

hi, what you want to build is already designed; check the Acqua Tempus from Arelia https://arelia.es/blog/19_shower-timer-acqua-tempus.html but this one does not need any electric wiring, it produces all the power it needs, great product as far as I have been able to find out about it

!(http://[url=http://<a target=)!(http://thumbs.subefotos.com/a8e57906de1a18af7c6f035d25542df7o.jpg)]
![](http://[url=http://<a target=)![](http://thumbs.subefotos.com/dd433c9d63ecc4f65ae76843a8fa86f1o.jpg)]

!(http://(http://thumbs.subefotos.com/b294313bb6e40e15929a74bd042919c6o.jpg)]

this video is not very good but still quite clear, Control de duchas: temporizador Acqua Tempus - ahorrando agua y gas. - YouTube

Paul_KD7HB: In America, all states now have laws requiring showers to be operated with a single control that begins at cold and gets warmer as you continue to turn the control. There is also a requirement that a heat sensitive part must be incorporated to limit the temperature of the shower water.

Is that for commercial properties such as hotels? I've been in many hotels and other commercial/public type showers (campgrounds) and I don't remember the last time I saw a 2 knob shower in one of those. However, there are dozens of 2 knob units available at your Big Box stores that anyone can put in their shower at home. I just installed one a few months back.

DangerToMyself: Is that for commercial properties such as hotels? I've been in many hotels and other commercial/public type showers (campgrounds) and I don't remember the last time I saw a 2 knob shower in one of those. However, there are dozens of 2 knob units available at your Big Box stores that anyone can put in their shower at home. I just installed one a few months back.

and how do those 2 knob units work ar home? are they worth it?

Thought everyone knew how they work. Turn one for hot. The other for cold. Pretty simple really.

As for worth, well I didn't have to remodel my bathroom around a single knob unit. So, probably saved several hundred dollars, if not thousands. So, well worth it to me. I've used 2 knob showers at home my entire 50+ years. So, no big deal.

sounds like a plan should save you the effort of hollering at the kids when they are running up the water bill..... what is the question we are answering?