Done with two Op-amps
As Non inverting Amplifier (The signal goes in from the + input)
The gain in defined by
V.out = 1 + R2/R1 * V.in
In this Exemple Gain is : 1 + 19k/1k = 20
The association of these two give 400 GAIN
The capacitor and resistor in the end give a High Pass Filter with Leaves the high frequency in their normal state et filter out the low frequencies..
EX : 3 volt at 10Hz filtered out as .6 volt
If the filter is perfect.. wich is obviously not 3 volt becames 0 volt ^^
So try it and enjoy :P but this may propably lack current to run any great thing .. but cool as a first experience ^^"
