The doorbell system is mainly designed for elderly or vision-impaired persons and is pretty straight-forward in its workings. In short, the doorbell switch triggers the camera to obtain footage. Next, faces in the footage are detected and matched with a whitelist and blacklist. The occupant gets clear visual feedback by a clear traffic light display. Hereby, the green, yellow or red light indicate that the person(s) are on the whitelist, unknown to the system or on the blacklist respectively. If the yellow or red light is triggered, the photo is sent by a Telegram bot to inform/warn a relative or caretaker.
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Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.