Add a Signal Strength Indicator

But there’s no LED, and you know I love LEDs, so let’s add an LED to the super sensitive audio amplifier to include an LED. And, we’ll use the LED to indicate how strong the signal the microphone (earphone) is picking up.

[am4show have=’p9;p51;p103;p108;’ guest_error=’Guest error message’ user_error=’User error message’ ]

[/am4show]