In the follow a way to interface TDA7439 to a Raspberry drived from Nodered platform.
This is a way to power On other devices if our hdmi audio extractor feel presence of hdmi signal from SmarTv. Cyp Au-1harc is great to be connected out directly at power amplifier, because it have builted-in a volume control drived from remote of SmarTV.
Save the life of our project stored in sd memory is almost a backup 🙂
Raspberry pi as astronomical clock.
In the follow a guide to use 2 sim on a phone IOS/Android without physical second slot for sim.
This guide permit to use a Raspberry-Pi zero(W) as a Pedestrian detector and smooth DVR, but given the low speed of board max resolution can be 640×480. Anyhow i’ll describe how use a PI3 and with it resolution can be at least 1280×720. With wifi connection and PI3 also Ethernet.