Hello I am trying to understand that how can I read the data using arduino? Which kind of filters or amplifiers do I need for that transducer. I connect my Garmin GT20-TM to the oscilloscope to understand which kind of data does it produces because I couldn't find any kind of datasheets or pinout information online. The only information that I found by myself is that I cut the wire and look inside I saw 3 cables one red one black and one white
This is the data that I take without the connection the I connect power supply but the signal does not change. Does anybody know something about it.
First I gave 18 volt and than 12 volt
Than I connect it to the signal generator and gave 200khz and 83khz for test but I couldn't understand the output that I take and should I gave rectangle wave or sinus wave. Can anybody help me about this problem?
The very first thing a researcher must do is determine if the device works properly as it was designed to do. Did it work properly when it was a fish finder?
Yes it was working. I am trying to make my own fish finder thats why I need to understand how does it work. How does generates signal and send it to the fish finder ?
Your first step should be to google how fish finders work to get as much information as you need .
The transducers to get the sound pulse into the water will be an expensive part .
It is a very complex project ( coding the scan mechanism and interpret time critical signals ), so after your research decide how you will copy that .
The display is also a tricky part , so you need some good coding (very good ) skills .
Sure, but that signal will be fairly high voltage AC (typically several hundred volts), with frequency typically near the transducer resonant frequency.
You will also need an ultrasonic audio amplifier to detect the return pulse.
