School Project using water to deactivate alarm

In summary, the conversation discusses the creation of an alarm that is activated by pouring water on a moisture sensor and the challenges faced in testing and resetting it. The group plans to incorporate Bluetooth into the final design but is currently focused on finding a solution for the resetting issue, potentially by incorporating a small hole in the basin to slowly drain the water.
  • #1
skymilks
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< Mentor Note -- thread moved to HH from the technical engineering forums, so no HH Template is shown >

Hello! My partners and I are trying to create a alarm that is set to go off at a certain time then is turned off by pouring water on a water or moisture sensor. We have a few ideas but they seem much to complicated or to expensive to test out. Another problem we are facing is how to reset the alarm without the excess water from the previous "trial pour" automatically turning off the alarm, instead of manually drying off the sensor in order to try again. We plan on incorporating Bluetooth into our final project design as well, but we don't plan on getting their for a while if we even do.

Thanks!
 
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  • #2
And your question is ... ?
 
  • #3
Regarding the resetting problem, I would suggest a small hole in the bottom that will slowly drain the basin the trigger is in. The size of the hole will modulate the "memory" of the alarm.
 

1. How does using water deactivate an alarm?

Water is a good electrical conductor, meaning it can carry an electrical current. Many alarms use electrical circuits to function, and when water comes into contact with these circuits, it disrupts the flow of electricity and deactivates the alarm.

2. Can any type of water be used to deactivate an alarm?

Yes, any type of water can be used to deactivate an alarm as long as it is able to make contact with the electrical circuits. This includes tap water, distilled water, and even salt water.

3. Are there any risks involved in using water to deactivate an alarm?

Yes, there are some risks involved. First, there is a possibility of electric shock if the person attempting to deactivate the alarm is not careful. Second, using excessive amounts of water can cause damage to the alarm system or the surrounding area.

4. Are there any alternatives to using water to deactivate an alarm?

Yes, there are other methods that can be used to deactivate an alarm, such as using a key or code to disarm it. Some alarms also have a manual shut-off switch that can be used. However, these methods may not always be available or may require prior knowledge or authorization.

5. Is it legal to use water to deactivate an alarm?

In most cases, it is not illegal to use water to deactivate an alarm. However, it is important to note that intentionally tampering with or damaging someone else's property, even if it is an alarm, can still be considered a crime. It is always best to use caution and seek proper permission before attempting to deactivate an alarm using water.

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