Ok here is my project.
My house uses wood heat so a digital thermostat was just installed near the stove. When the temp drops too low it opens a relay, and that closes a circuit to a 1.5v buzzer (Right now it's on a AA battery).
The idea is, when the buzzer rings, we know it's time to put wood into the stove (which is in the basement).
It works, however it continues to buzz until the heat surpasses the set thermostat temp which could be 5 minutes or more after it starts buzzing.
So here is the circuit I'm requesting.
When a 555 timer receives power (relay on from thermostat), it should activate the buzzer. When a "silence" button is pressed, the buzzer should be silenced for about 10 minutes. If at this point the power hasn't cut off to the whole circuit, it should start buzzing again. If the power has cut off it should still work the next time the relay closes.
I have searched bistable circuits and that is almost close to what I think I need, but I have a feeling 2 timers will be needed.
Anybody with the expertise is free to weigh in
thanks for reading my long post
My house uses wood heat so a digital thermostat was just installed near the stove. When the temp drops too low it opens a relay, and that closes a circuit to a 1.5v buzzer (Right now it's on a AA battery).
The idea is, when the buzzer rings, we know it's time to put wood into the stove (which is in the basement).
It works, however it continues to buzz until the heat surpasses the set thermostat temp which could be 5 minutes or more after it starts buzzing.
So here is the circuit I'm requesting.
When a 555 timer receives power (relay on from thermostat), it should activate the buzzer. When a "silence" button is pressed, the buzzer should be silenced for about 10 minutes. If at this point the power hasn't cut off to the whole circuit, it should start buzzing again. If the power has cut off it should still work the next time the relay closes.
I have searched bistable circuits and that is almost close to what I think I need, but I have a feeling 2 timers will be needed.
Anybody with the expertise is free to weigh in
thanks for reading my long post