Hey,
I was building a microphone with a piezo sensor and tested it out with my computer. I assumed(though with no real reason) that amplitude of the waves is directly proportional to the voltage, so to amplify the input (me talking), i just passed the piezo output through a transistor which was connected like this:
base- 1K resistor to piezo input
collector-+1V (from +5V using 2 resistors as a voltage divider)
emitter- microphone jack to computer
I tried increasing and decreasing the voltage input of the transistor, but the playback volume is always too low....
What am i doing wrong ?
Thanks !
I was building a microphone with a piezo sensor and tested it out with my computer. I assumed(though with no real reason) that amplitude of the waves is directly proportional to the voltage, so to amplify the input (me talking), i just passed the piezo output through a transistor which was connected like this:
base- 1K resistor to piezo input
collector-+1V (from +5V using 2 resistors as a voltage divider)
emitter- microphone jack to computer
I tried increasing and decreasing the voltage input of the transistor, but the playback volume is always too low....
What am i doing wrong ?
Thanks !