I installed a circuit amplifier to my breadboard, to amplify the sound of my buzzer. I used a 9v battery as the power source. I connected it to the positive and negative line. The negative line is connected to ground.
The issue is I have a vibration sensor that can only withstand 3.3v to 5v.
Is there any way to test out whether or not the sensor would work? Without shortcircuiting it?
If your vibration sensor requires a DC voltage supply in the range 3.3 V to 5 V, then you could get a voltage-adjustable 'bench' DC power supply to supply the required amount of DC supply voltage to the sensor.
Not sure what you mean by 'without shortcircuiting it'. You're not meant to short circuit anything (in general).
Or you could just breadboard an LM-317 (http://www.eleccircuit.com/my-first-variable-dc-power-supply-1-2v-to-30v-1a-by-lm317/)
(you can replace the unregulated input section with a store bought wall wart dc power supply (ie: 9V)
Before we get to carried away.
Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?
Can you post a picture of your project?
What is your circuit amplifier for your buzzer?
What model Arduino are you using?
Thanks.. Tom.. :)