The modules use both the RCWL-9616 and the BISS-0001 but it seems the schematics are all labeled BISS-0001. The parts values are different. He gives some good information about them. They operate at 3.5 and 3.98 GHz – the ones I have were advertised at 5 GHz. Also he shows his own version that uses a
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https://www.spglobal.com/marketintelligence/en/news-insights/latest-news-headlines/study-finds-green-hydrogen-can-be-competitive-with-fossil-fuels-as-soon-as-2030-74961136
The sensors on new satellites can sense huge methane releases on Earth. https://amp.theguardian.com/environment/2022/mar/06/how-satellites-may-hold-the-key-to-the-methane-crisis
I have a PIR (passive infrared) motion sensing light on my porch for more than a year, and I’ve noticed that it can sense some of the cars that go by. If the car has been running, like coming home it will usually trigger the light. But when a neighbor starts the cold car and
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Photo from ?? Thanks, Mike Guerrucci. This is a simple device. That means it’s just a buzzer and a battery. And it has a super sensitive magnetic switch. This detector is always open until it is disturbed by a magnetic field. They call it a magnetometer. One way to make this is to use a
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Many years ago I saw electronic listening devices for receiving a block of ultrasonic frequencies that bats use and downconvert that block to frequencies that humans can hear. But no one to my knowledge has tried to convert human frequencies up to ultrasonic frequencies so that humans can try to establish a conversation with other
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I bought two of these motion sensing LED lights for my hallway. They have a rechargeable cell that is charged through a micro USB port. To see one inside watch big Clive’s YouTube video – the ebay link to buy them is in his description. The charge lasts for more than a week with frequent
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I’ve been thinking about this for awhile. Let’s say I have a switch, for example a thermal switch that only has contacts that are NC (normally closed) until a certain temperature is reached. At that point, it changes to open, interrupting the circuit. But the input to my controller senses NO (normally open) switch contacts
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