Hello forum members!
I'm attempting to build a simple control unit for a salt water chlorine generator (SWCG).
In a nutshell, a SWCG consists of an electrolytic cell, bathing in a salt water solution. A voltage applied to the plates in the cell causes an electro-chemical reaction which generates hypochlorous ions - to sanitize the water and oxidize bather waste. SWCGs are becoming gaining in popularity (as an alternative to bleach or pucks) to keep pool and hot tub water clean.
The control unit in its simplest terms (see block diagram below):
I am in the very initial stage of drawing this circuit out.
The purpose of this post is to validate my approach in the use of SSRs .
I've developed several Arduino projects in the past, and am OK with that. I'm just wondering whether my use of SSRs is okay in this context.
Thanks in advance!!
Ron
Montreal
I'm attempting to build a simple control unit for a salt water chlorine generator (SWCG).
In a nutshell, a SWCG consists of an electrolytic cell, bathing in a salt water solution. A voltage applied to the plates in the cell causes an electro-chemical reaction which generates hypochlorous ions - to sanitize the water and oxidize bather waste. SWCGs are becoming gaining in popularity (as an alternative to bleach or pucks) to keep pool and hot tub water clean.
The control unit in its simplest terms (see block diagram below):
- is a programmable (Arduino) timer which applies DC voltage to the plates for short periods (eg 15 minutes) at regular intervals (eg 6 to 8 times) throughout the day; so an RTC & battery are part of the project (not included in diagram);
- a fixed 24 VDC is required for the cell to generate the ions; the current varies between 20A and 25A depending on salt concentration and water temperature;
- on alternate cycles that the plates are energized, the current must change direction;
so, if at noon plate A is positive, and B is grounded, then at the next cycle, say 4PM, plate B will be positive and A grounded; - I contemplate using SSRs (solid state relays) to control current direction on alternating cycles (see block diagram);
- in the diagram below, when pin 1 is high, current flows one way (B to A); when pin 2 is high, current flows the other way (A to B);
Note: pins 1 and 2 are NEVER high at the same time! but both can simultaneously be low (ie. no current flow in either direction;
I am in the very initial stage of drawing this circuit out.
The purpose of this post is to validate my approach in the use of SSRs .
I've developed several Arduino projects in the past, and am OK with that. I'm just wondering whether my use of SSRs is okay in this context.
Thanks in advance!!
Ron
Montreal