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David Richard

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  1. Once, one of our neighbors moved in and loaded up the furniture and stuff, which made him popular. Then there was a loud noise and a lot of people thought one of the pieces of furniture had fallen off, so no one checked. But out of curiosity, I went to the balcony and to my surprise the auto rickshaw had an accident and the driver was buried under the vehicle. After seeing it, I ran to the place with my father and moved the car. After 5 minutes, I was surprised that few people had gathered. So I came up with a project that lets people know their neighbors at the push of a button. Many people today are so busy with work that they can't check their surroundings, and people sometimes get discouraged or scared and don't know what to do next. With this in mind, I created a simple interface project to notify neighbors in case of an emergency. With the help of Arduino, GSM module, simple push button and other things, this project is possible. The mobile phone number and emergency alert message are predefined and stored in the Arduino. When a push button is pressed, an emergency alert message is sent to that number. People in emergency situations such as the elderly live alone Low blood sugar (hypoglycemia) chest pain / heart attack big haircut kick breathing, etc. 2. Theft/intruder incident 3. or unforeseen events other than the events mentioned above or natural disasters or environmental disasters.
  2. This is in depth details with images i guess we need to follow your instructions.
  3. If you're using a multimeter, all bets are off above a few hundred Hz. Make yourself a smoothing filter with 10k and 1000uF and measure that. Also, check the datasheet of the 595, it's possible that the O_EN takes longer to propagate a turn-on than off; this would increase the duty cycle at high frequencies.
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