Hi Carl47,
First of all many thanks for your reply.
It am very delited to recieve responce which is very welcome.
In reacton of your anwser.
Good to hear that the sensor are ok.
I had a real good look at your picture in your article and I saw that you used also screened cable.
You connected the wire from the sensor direct on the PCBclose to the ic connection.
I changed the connection like you did. ( I routed the signal from the ic to terminals on the side of the PCB most problaby caused interfirence)
In this way it is optimal.
I wonder if the sensor realyis so sensitive. On the west sensor I heared the pulses as normal but also pulsen a bit weaker just for the stronger pulses.( interference)
I changed the place of the sensors west to south and south to west now the interference is not heard.
How can we check if a set of sensors are best for each other?
The ZCD is able to adjust to about 3000. This looks ok now.
Stil the envolope is 6000 about.
I will take a scope to check the CRO signal. ( can send scope pictures)
I think something is wrong with the LM324 loop envolope.Amplifier setting or so.
I keep you posted.
Kind regards,
Theo (ilioSS)
ps. Like your project gives lot of fun.