Hello everyone!
You are on the CyberLab channel and today I have a video about how to open a door connected to the intercom using a Yandex column Alice It often happens that someone calls the intercom, and you are busy with something at that moment, or just too lazy to come up to would open the door. A familiar situation, isn't it? And my intercom does not open the door at all without picking up the phone, and if you do not pick up the phone within 30 seconds after the call, the image disappears and the door opening button does not work until a new call arrives. Since the intercom is not cheap (at that time), the toad choked me to change it to another. But here, to my happiness, last year they gave me a voice assistant Alice for my birthday and I had an idea to open the door through the voice command of a smart speaker. And today came the day when I undertook to implement my idea and integrate it into my "Smart Home". How the door station of the video intercom works. The outdoor panel is connected to the intercom monitor using 4 wires GND, 12V, audio and video. If on the calling panel, close the Audio wire through a 100 Ohm resistor to GND, then a call signal will be heard. And if a voltage of 12 V is applied to the Audio wire, the relay for opening the electromagnetic lock will work. If you use a special intercom cable to connect the outdoor panel to the monitor, then it is usually connected according to the following instructions: GND - 12 V shielding braid - red wire Audio - blue wire Video - central core of the coaxial cable To connect our Arduino device to the intercom , only 2 wires are required. Instead of a relay, you can use an N-P-N transistor key or a PC817 optocoupler. I used an IR receiver, the first one that caught my eye, which I once dropped from an old TV set and which had been lying on my shelf in the trash for many years
16 дек 2020
