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  • ana0001 commented on Grathio's instructable Secret Knock Detecting Door Lock1 year ago
    Secret Knock Detecting Door Lock

    I’m taking a subject of entrepreneurship and we have to present an idea to put in the market. My group thought about a keychain with a little light that warns us if we locked our front door or forgot. In case we don't lock, the light of the keychain is red. Otherwise the light will be green. We don’t have a deep understanding of electronics, but from what I searched I think the best way to do this would be with a piezoelectric sensor installed in the lock, so that when the door latch goes into the cavity, the sensor will be activated. I probably also need a arduino, right? To receive the information of the sensor. My question is: what else do I need to send that information to the keychain? How can that be done?What are the main components to do something like this?If anyone...

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    I’m taking a subject of entrepreneurship and we have to present an idea to put in the market. My group thought about a keychain with a little light that warns us if we locked our front door or forgot. In case we don't lock, the light of the keychain is red. Otherwise the light will be green. We don’t have a deep understanding of electronics, but from what I searched I think the best way to do this would be with a piezoelectric sensor installed in the lock, so that when the door latch goes into the cavity, the sensor will be activated. I probably also need a arduino, right? To receive the information of the sensor. My question is: what else do I need to send that information to the keychain? How can that be done?What are the main components to do something like this?If anyone could explain me just the basics, it would be a big help already. Thanks.

    I’m taking a subject of entrepreneurship and we have to present an idea to put in the market. My group thought about a keychain with a little light that warns us if we locked our front door or forgot. In case we don't lock, the light of the keychain is red. Otherwise the light will be green. We don’t have a deep understanding of electronics, but from what I searched I think the best way to do this would be with a piezoelectric sensor installed in the lock, so that when the door latch goes into the cavity, the sensor will be activated. I probably also need a arduino, right? To receive the information of the sensor. My question is: what else do I need to send that information to the keychain? How can that be done?What are the main components to do something like this?If anyone...

    see more »

    I’m taking a subject of entrepreneurship and we have to present an idea to put in the market. My group thought about a keychain with a little light that warns us if we locked our front door or forgot. In case we don't lock, the light of the keychain is red. Otherwise the light will be green. We don’t have a deep understanding of electronics, but from what I searched I think the best way to do this would be with a piezoelectric sensor installed in the lock, so that when the door latch goes into the cavity, the sensor will be activated. I probably also need a arduino, right? To receive the information of the sensor. My question is: what else do I need to send that information to the keychain? How can that be done?What are the main components to do something like this?If anyone could explain me just the basics, it would be a big help already. Thanks.

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