plasticcat
New Member
ok here is my question.... like most i have it in my head but hard to put in words so heres a shot...
i am making a circuit that lets 2 thermostats controll one air conditioner unit and i have a relay that allows one or the other thermostat to be sent to the main air conditioner at any given time.... so lets say thermostat 1 is on the normally closed contact on the relay and thermostat 2 is on normally open, now lets say if this condition existed..... thermostat 1 is in use at this given moment then thermostat 2 is turned on and being used. I cant have 2 thermostats calling at the same time, so i have a astable timer circuit in place to give 15 minutes to each thermostat untill each thermostat has reached temp. ok so far so good, but lets say thermostat 1 (normally closed) is calling first and then thermostat 2 (normally open) calls therefore energizing my timing circuit to alternate 15 minutes between them both, but in doing so, in the nature of the circuit, it will enegize my relay allowing thermostat 2 priority when thermostat 1 should have it.......
i hope i made sense
so to solve this i have came up with this solution...
in the event that both thermostats are calling and thermostat 1 calls first, i have a secondary monostable timer circuit set at 15 min to allow the full 15 minutes to thermostat 1 is allowed to use then when the 15 minutes is over, turn controll over to the other timer circut to go into normal 15 minute cycles
god i hope this made sense, im really bad at typing out whats in my head
if this sounds like it would work give me input if not tell me how i can explain better
i am making a circuit that lets 2 thermostats controll one air conditioner unit and i have a relay that allows one or the other thermostat to be sent to the main air conditioner at any given time.... so lets say thermostat 1 is on the normally closed contact on the relay and thermostat 2 is on normally open, now lets say if this condition existed..... thermostat 1 is in use at this given moment then thermostat 2 is turned on and being used. I cant have 2 thermostats calling at the same time, so i have a astable timer circuit in place to give 15 minutes to each thermostat untill each thermostat has reached temp. ok so far so good, but lets say thermostat 1 (normally closed) is calling first and then thermostat 2 (normally open) calls therefore energizing my timing circuit to alternate 15 minutes between them both, but in doing so, in the nature of the circuit, it will enegize my relay allowing thermostat 2 priority when thermostat 1 should have it.......
i hope i made sense
so to solve this i have came up with this solution...
in the event that both thermostats are calling and thermostat 1 calls first, i have a secondary monostable timer circuit set at 15 min to allow the full 15 minutes to thermostat 1 is allowed to use then when the 15 minutes is over, turn controll over to the other timer circut to go into normal 15 minute cycles
god i hope this made sense, im really bad at typing out whats in my head
if this sounds like it would work give me input if not tell me how i can explain better
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