D
DarkPath
- Jan 1, 1970
- 0
I wants to convert my old hot tub controller, wich is currently using
relays, to more reliable TTL gates (solid state) and opto-isolators.
Design and build a logic circuit thatl will replace the control function
of the relay controller. The all solid-state circuitry would have to
operate the following functions:
Switch Input #1-Main Power
Switch Input #2-Underwater Light
Switch Input #3-Circulator Pump
Switch Input #4-Jet Pump
Switch Input #5-Heat Demand Signal (thermostat)
Nothing may operate until switch #1 is activated (main power).
The light swithch (#2)may then be switched on or off independently after
the main power switch is on. However, they may not operate at the same
time. If one has been previously turned on, the other will not operate.
The first motor function to occure will have priority.
If switch #5 (heat demand) is activated, water must be moving through
the system, therefore if the water is stagnant, the circulator must
start automatically. If the circulator or jet pump is already running
when the heat demand is activated, no other function needs to take place.
Please reply via usenet. My header is a spam trap
relays, to more reliable TTL gates (solid state) and opto-isolators.
Design and build a logic circuit thatl will replace the control function
of the relay controller. The all solid-state circuitry would have to
operate the following functions:
Switch Input #1-Main Power
Switch Input #2-Underwater Light
Switch Input #3-Circulator Pump
Switch Input #4-Jet Pump
Switch Input #5-Heat Demand Signal (thermostat)
Nothing may operate until switch #1 is activated (main power).
The light swithch (#2)may then be switched on or off independently after
the main power switch is on. However, they may not operate at the same
time. If one has been previously turned on, the other will not operate.
The first motor function to occure will have priority.
If switch #5 (heat demand) is activated, water must be moving through
the system, therefore if the water is stagnant, the circulator must
start automatically. If the circulator or jet pump is already running
when the heat demand is activated, no other function needs to take place.
Please reply via usenet. My header is a spam trap