Nirodha
Newbie level 6
Audio circuit problem
Hello,
I have a circuit that uses a phototransistor to convert a light signal into an electrical signal. I amplify the voltage of the signal with another transistor. The circuit works when plugged into a laptop recorder, but when I replace the laptop with a simple 9V speaker/amplifier from radioshack, the output vanishes.
Do I need to convert my output to AC, or do I simply need to amplify the current by some amount to drive the speaker?
Thanks in advance.
Hello,
I have a circuit that uses a phototransistor to convert a light signal into an electrical signal. I amplify the voltage of the signal with another transistor. The circuit works when plugged into a laptop recorder, but when I replace the laptop with a simple 9V speaker/amplifier from radioshack, the output vanishes.
Do I need to convert my output to AC, or do I simply need to amplify the current by some amount to drive the speaker?
Thanks in advance.