Hello to all,
For our project, I am trying to design a very easy PCB with a NE555 Timer to measure the soil humidity.
My first idea was to use a circuit board (attached as a photo) as my capacitive sensor. There is epoxy between the copper layers. I soldered one cable to each side to measure the capacity at different conditions like in the air, in a glass of water, in soil, etc. In the end, I connected this "sensor" to my circuit and it worked really well. I measured the frequency of around 250 kHz in the soil.
Now I want to bring this circuit and the sensor on one PCB, something like in the attached file. For the purpose of this project, I can't just order it from amazon.
I designed the circuit in EAGLE but I don't know exactly how I should be designing the rest of the board. You can see the screenshot of my circuit attached. There is a capacitor called SENSOR. One leg of it needs to be one side of the board and the other leg other side of the board.
I hope you could help me with your ideas
I wish you a Merry Christmas and a healthy new year
For our project, I am trying to design a very easy PCB with a NE555 Timer to measure the soil humidity.
My first idea was to use a circuit board (attached as a photo) as my capacitive sensor. There is epoxy between the copper layers. I soldered one cable to each side to measure the capacity at different conditions like in the air, in a glass of water, in soil, etc. In the end, I connected this "sensor" to my circuit and it worked really well. I measured the frequency of around 250 kHz in the soil.
Now I want to bring this circuit and the sensor on one PCB, something like in the attached file. For the purpose of this project, I can't just order it from amazon.
I designed the circuit in EAGLE but I don't know exactly how I should be designing the rest of the board. You can see the screenshot of my circuit attached. There is a capacitor called SENSOR. One leg of it needs to be one side of the board and the other leg other side of the board.
I hope you could help me with your ideas
I wish you a Merry Christmas and a healthy new year
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