Archives for category: Analog Circuits

Today in Analog Circuits class, we built our first operational amplifier circuit.  We used an LM358 op amp to amplify the input from an electret microphone.   I’ve wanted to learn about op amps for a while now, so I’m excited that my circuit works!


Here I have a volunteer whistling into a mic.  The op amp outputs to a speaker.



Today in analog circuits, we built a simple circuit with an awesome 555 timer.  Check out my breadboarding skillz and watch the LEDs blink!

Note: at the beginning of the video, the LEDs are blinking too fast for the camera to pick up.  It appears as though one LED is on and one LED is off – in reality, they were both blinking at opposite intervals.