“Continuation of the previous project, now presenting the electronic part, which together with the Geophone sensor will represent a complete
A seismometer, is an instrument used to detect and record ground motion caused by seismic waves, such as those generated by earthquakes, volcanic eruptions, or other sources of ground vibration. Basically, the seismometer consists of two parts, and one part is a sensor that detects the earthquake and converts it into an electrical signal, and the other electronic part that amplifies, processes and records this weak signal for further processing.
In the previous video, I described a very simple and inexpensive way to make a very sensitive Geophone sensor that is capable of detecting earthquakes from the entire globe. This time I will continue by presenting the electronic part, which together with the sensor will represent a complete home seismometer. During the production I will use a ready-made module and a microcontroller, so there will be no need for extensive prior knowledge and experience in the field of electronics.
First let’s dwell on the amplifier. The signal induced in the sensor coil is very weak, so it needs to be amplified. For this purpose I use small module with LM358 IC which is capable of amplifying weak signals up to 10000 times. We can regulate the gain with these two potentiometers.”