Hi Everyone,
I have Reverse Osmosis home water filter system with 7 stage of filtering, the orders are:
- Solids filter
- Active Carbon filter
- Sediment filter
- Reverse Osmosis Mebrane
-- 3.5 Galloon Tank here in between the stage - Carbon filter
- Taste & Odor filter
- Lastly, the UV light
The whole out of the shelf package is not convenient when I look at the operation closely. It makes me think of modifying the system specially during the water production process and when collecting the water out of the faucet. Here's my issues:
a) When the tank is full, the Low Pressure (LP) at the inlet is remained engaged because of the inlet high pressure, this is fine; also the High Pressure (HP) between the Tank and RO Membrane is OFF, that must be. But, when I open the faucet, of course I'm collecting product water out of the Tank, it's switching ON the booster pump motor by engaging the HP even I collect a glass of water just when it got filled; in other words, the booster pump had switched ON by HP to produce filtered water again because of the state changes on HP valve. Now, I want the Tank to reach 1/4 or lower in capacity before it reprocess again the good water.
b) Next, by default the UV light has an HP switch valve along the faucet line, when the faucet is Open for collection, the HP valve switches the UV light power supply to do its job on the water flowing out. And when the faucet is Closed, the HP switch valve opens the circuit of UV light to turn the power supply Off. But when the Tank is half-way filled and its pressure is less for HP to remain Off, what's happening is, from half-way filled tank all the way to empty status the UV light remains ON and it heats up the UV housing as well as the stocked waters that last for days until the Tank got filled again. Now I want to replace the HP switch valve to do the switching of UV light, I have the coffee flow sensor switch that is reliable on sensing the flowing water from high to low pressure, my problem is I don't have controller to connect this to switch On and Off the UV light which disregarding the amount of pressure available from the Tank.
c) The controller should switch On the flush valve every 10-15 min for 15 Sec when the booster pump and RO membrane are in the process producing the water to prolong the life of the membrane where I have a flow restrictor at the waste water outlet.
d) Also I want a filter monitor for all of the disposable filters when it is time to replace due to its performance life by counting how many liters or galloon it has been through. And this filter monitor should beep me every certain period of time until it received an attention, acknowledgment or reset. The filter period should be configurable into desired limit when it reaches the liters it process.
There are controllers out of the market for RO system but not giving the necessary performance as I desire.
Is there anybody who can provide me solution using Arduino controllers which not necessarily complicated but the straight forward solution that has a timer and switching features?
Sincerely yours,
makelifeasy