Please, bear with me, I'm a real rookie at electrical engineering. So please be easy on me. ;-)
I've got the following circuit. I have a 5 seconds HIGH / LOW interval on
D5 and am seeing the voltage drop to near 0 and rise to 12V when measuring with my multimeter on the terminals of the speaker. Still, my Piezo speaker won't make a sound. When connecting it straight to the 12V source, it works as perfectly. What am I missing? Current at the source of the MOSFET I guess? But, why? Did I connect it wrong?
P.s. also tried connecting a LED with a 470 ohm resistor after the MOSFET, but that does not turn on either. And this also simply works directly on the 12V power source.
- Transistor used: IRF520N (datasheet)
- Voltage Regulator used: L7805CV (datasheet)
- Piezo speaker used: BU2 M28 (datasheet)