Would someone be so kind as to help me figure out why my circuit is not working?
I am having difficulties with Experiment 11, Steps 2 & 3 in Charles Platt's book. The experiment is designed to teach me how I can use transistors to amplify a signal, and to audibly hear that amplified signal through a 8 ohm speaker.
Here's the schematic:
Here's a picture of the circuit I built:
I am able to build the oscillator with the LED on the top, no problem, but I'm not getting any sound to come out of the speaker. My multimeter tells me that current is going through the transistor. When I scratch the leads of the multimeter against the emitter and collector leads of the transistor, I do get some noise from the speaker, so I know the speaker is not broken.