Experiment Name: Voltage Controlled Oscillator

Conducted By: Jamie, Clover, Michael (Tianyu), Tom, Anpu, Harry

Conducted On: Mar 8, 2020

Circuit Diagram

This is the original diagram that I referred to.

 

Due to the difference in the material we have, the following is the exact circuit I used for this lab.

Materials

Here is a list of materials I used in this lab:

1. A breadboard
2. A NE555
3. 2 200kΩ potentiometers
4. A 1kΩ resister
5. Two 100Ω resisters
6. A speaker,
7. A 0.01μF capacitor
8. 4 1.5V some batteries

Circuit

Here are the pictures of my breadboard:

When the power is on, we can hear the beep sound.

One mistake I made

When designing the circuit, I tried to work with the following draft:

One thing I didn’t notice was that in this circuit, there’s actually a shout out problem. I finally found out this issue by using the online simulator.

Bad Speaker

My speaker also had a bad connection. Since I do not have a soldering iron, I used tapes to stick it.