Mutual Induction

  If we make alternating current to flow through a coil, it creates a time varying magnetic field. Voltage will be induced on another coil kept within this field. We need to monitor the applied and the induced waveforms on the two analog channels. Both should be fed through the level shifters since they go to negative values. The primary waveform can be from an external source or a waveform generated on the DAC socket. The output from the DAC socket is passed through a capacitor to block the DC component.
    The photograph shows the connection of the two coils. One is connected to between the DAC socket and ground. It is also connected to CH1 through the level shifter amplifier. A sinusoidal wave of around 50 Hz is set on the DAC socket. The induced voltage is fed to CH0 through another level shifter. The red colored trace is the input and black one is the output. The ferrite material is required to give good magnetic coupling.
       You can also use this simple Python program to capture the above waveform.
# xmgrace -nxy mu_induction.dat    , to plot the result.