I am trying to drive a speaker from M48. I am using PB0 to send an ON/OFF pulse to my speaker. The speaker is 16 ohms. However when connected, the speaker does beep but the sound is too low. I looked at the datasheet and the M48 is supposed to drive 40 mA but this is not enough. Can I use a 2N2222 transistor to drive my speaker harder? If yes, how do I connect my 2N222 to drive my speaker louder? I checked and the beta for this transistor is about 180. U
Unfortunately I do not know the power rating of this speaker. It must be definitely higher than 25.6 mW since the sound is very faint with 40 mA and 16ohms.