Yes, I know, you all want to know about the soap opera that is my life. Well, today, we’re going to get a little more literal with the soap part than usual, because it’s time for my useless invention of the month.
Here’s the idea. Take your typical bath/shower valve assembly. Now remove it. Replace the two valves with two spring-loaded voice-coil style actuators (i.e. the more current you put into them, the wider they open, when all current is removed, they default closed). Add manual valves to ajust the close-stop (for the old fashoned or for bathing in a power failure]
Now add a microcontroller and DC power supply. [since there’s going to be water around, we don’t really want a AC-operated device. Also, pot everything just to be sure]
Add some buttons, like:
Flow:
OFF
DOWN
UP
MAX
AUTO-FILL
Temp:
UP
DOWN
Preset:
1
2
3
4
SHOWER/BATH
BATH-UNTIL-HOT
Add a optical sensor that tells the widget when the tub is full, so it can automatically turn off.
Now, you can all probably visualize where this is going. You set your flow and temp once, and store it in a preset. Then, in the morning, you just whack that preset button. Whala, a shower that is the perfect temp. Even if someone flushes the toilet during your shower, the computer automatically ajusts to keep the shower temp the same (though the flow rate may massively decrease). With ‘BATH-UNTIL-HOT’ pushed, the unit flows water to the bath spigot until the water is up to your temp, then turns on the shower. No more uncertainty about shower temp in the morning, no more fiddling with valves..
The whole widget could probably be made for about $100 in parts, and be made reliable enough to last 50+ years. [Don’t forget the clamping zener and the MOV on the input to the power supply!]
We did mention that this device will only save you about 10 seconds a day and is more or less totally useless, right?
Thank you, drive through.
S.