I am working on a project that I am 90% done with. I just need to add one last feature.
I am designing a simple flood detection circuit. Here is the flow right now.
Power on - arm the device - start checking for floods - if flood detected, you must rearm with a push button. Can not rearm while flood is still detected.
The change i need to make is that I need the device to start up without needing to be armed. My problem right now is that I am treating a "flood" and loss of power as the same thing.
The circuit works like this:
On power on, the circuit is open until i press the button. The relay then latches until a flood breaks the contact again. The circuit "resets" when the button is pushed.
I have a DPDT just in case i need the a different power source to control
A few notes:
1. They do sell a Normally Open version of the sensor but id rather not have to buy more.
2. I know i can use an Arduino to do this pretty easily but I want the challenge of doing it solely with circuitry.
3. Adding more relays is not a problem if that would make it easy.
4. The circuit works, I have no issues with the current function, just want to modify to add the feature described.
TLDR: I want to adjust this circuit such that it does not need the button to be pushed on power up to activate the circuit, instead, I want the button to only to be used after a flood is detected in order to reset the circuit. I do not want the circuit to be able to restart on its own after a flood is detected (Sensor Opens.)
Thanks! Hope some of you find this interesting!
I am designing a simple flood detection circuit. Here is the flow right now.
Power on - arm the device - start checking for floods - if flood detected, you must rearm with a push button. Can not rearm while flood is still detected.
The change i need to make is that I need the device to start up without needing to be armed. My problem right now is that I am treating a "flood" and loss of power as the same thing.
The circuit works like this:
On power on, the circuit is open until i press the button. The relay then latches until a flood breaks the contact again. The circuit "resets" when the button is pushed.
I have a DPDT just in case i need the a different power source to control
A few notes:
1. They do sell a Normally Open version of the sensor but id rather not have to buy more.
2. I know i can use an Arduino to do this pretty easily but I want the challenge of doing it solely with circuitry.
3. Adding more relays is not a problem if that would make it easy.
4. The circuit works, I have no issues with the current function, just want to modify to add the feature described.
TLDR: I want to adjust this circuit such that it does not need the button to be pushed on power up to activate the circuit, instead, I want the button to only to be used after a flood is detected in order to reset the circuit. I do not want the circuit to be able to restart on its own after a flood is detected (Sensor Opens.)
Thanks! Hope some of you find this interesting!
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