I am designing something similar to a coil gun. So what I have is a magnet passing through/adjacent to a coil. Due to the electromagnetic induction, I do get a pulse(triangular) across the coil. However, the amplitude of this pulse is very low to detect, as its around 60mV peak.
I tried using a comparator(LM311) for detecting that low voltage, but noise disrupted the operation, as the noise level was also high. Is there something I can do to detect that pulse?
Things I thought about : 1. Increasing windings on the coil 2. Using a stronger magnet but apart from these, is there something that can help me achieve the same?
Currently the coil used is a small sized with about 30 turns of around 23-25 gauge magnet wire
UPDATE: I tried increasing the resistance by adding a 1Kohm-100Kohm in series to the coil, but it did not increase the voltage much. I also tried winding a coil with more turns but still the max voltage was around 40mv. Also, here is a video: http://www.youtube.com/watch?v=hajIIGHPeuU I came across. The current generated in this case is 20uA, which for a resistance of 1Kohm, should give a Voltage of 0.02V. Any other way, I can increase the voltage level. Would having a core help in anyway?