Victor M. Alvarez
Victor M. Alvarez
Hi, in theory you can replace the PIC12F508 with an ESP8266, but it would need a new program for decoding the signal and probably a new circuit. The ESP8266 is...
I didn't wrote the code for the ESP, I dropped the idea of using ESP very early in the design phase.
The A/V signal is analog, not digital. It looks like some kind of [composite video](https://en.wikipedia.org/wiki/Composite_video), but I'm not sure whether it is PAL, NTSC or SECAM. My expertise in that...
See #6.
@issalig that's very interesting, can you share more details about your setup?
It's hard to say what's happening there. Without an oscilloscope that allows you to see if the signal you are receiving is ok, you will have a hard time debugging...
Unfortunately I don't have the hex file around.
The trick is measuring the time that elapses from one pin change to the other. You need to measure for how long the pin remains without changes. When that interval...
It looks like the signal that arrives to you when someone rings outside is too weak, and falls below the threshold voltage for the LM2903. The LM2903 is acting as...
Great! The high pass filter looks like a great design improvement. If I understand correctly you put a capacitor in between R5 and Q1, right?