April 20, 2020
Intro to 555 Timers
1. Using Multisim, build a Monostable Multivibrator that has a decay of around 2 seconds. Determine the value of R1 assuming you are using 10uF for C1. Take a screenshot of the split screen showing that the pulse stays “high” for about 2 seconds. Also include a link to your Multisim page.
The pulse stays “high” for about two seconds but after that it starts going high and low very fast. I am working to figure out why it does this but I haven’t gotten it yet.
The 555 Timer Circuit – – – My Page
2. Find an example of another project that is based on a 555 Timer. What is the chip being used for? Can you identify if it is an Astable, Monostable, or Bistable multivibrator? Or none of the above?
The chip is being used to create a voltage controlled oscillator. It is an astable multivibrator.
Project: https://www.multisim.com/content/p8ftihA3q27xTTBJgzU6XM/555-timer-voltage-controlled-oscillator/
NYU Electronics 