SS4H-SD Smart Doorbell – DIY project based on ESP32

You surely know this feeling when the doorbell rings while you are doing something interesting: watching a movie, playing a video game, or spending a romantic evening with your loved one. And when it turns out that this is an uninvited/unwanted guest, you get even more pissed off.

Of course, you can ignore it and not open the door, but there will always be this hint of uncertainty – “maybe it was important”.

The solution to this problem is the “smart doorbell”. Thanks to it, you’ll know if it is worth getting up from the couch and opening the door or not.

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Simple External and Internal Weather Station using Arduino Nano, DHT22, 433Mhz

Today I would like to propose a simple project that requires easy skills. It’s a simple weather station, that measures, internal and external temperature. It’s made out of two components: an indoor receiver, and an outdoor transmitter. The transmission is managed at 433Mhz. The components and the electrical diagram for both devices, are showed in the video. The receiver is very easy to use. to toggle between the external and internal temperature, you need to press the button for more than 3 seconds.

Digital LED Staircase lightening in motion using Arduino and Ultrasonic Sensor

Automated lightening of staircase not only helps to save electricity but also takes us to advancement in quality living of life. We generally uses normal circuit to turn on and off the light in stairs, but there is loss in electricity since we turn it off only at once during sleep. So, in this tutorial we are going to make the automated staircase that will light up only when it senses motion of people passing through stair.

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DIY Smart Lock with Arduino and RFID

You walk up to an invisible lock that only you have the key for, and open it without even touching it. Sounds cool? Today we are going to build a simple RFID-based smart lock using an Arduino as the backbone and a few cheap components.

The technology behind this project is already used in many industries. Anyone who has worked in a modern office or used public transport will probably have used it every day. RFID (radio-frequency identification) identifies data stored on a chip in a card or dongle, and compares them to a list of tags that have already been scanned.

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