You Can Simulate a 555 Timer in 123D Circuits

It is an absolute joy to make this announcement about a tiny, unassuming chip that has changed the world:  You read it first here.  You can simulate a 555 in 123D Circuits!

Whether you knew it or not, we've all touched a 555.  They're inside appliances like toaster ovens, microwaves, alarm clocks, little robots, zillions of toys, early computers and even a few spacecraft.  They're everywhere!

Don't believe us?  According to their original 1971 inventor, Hans Camenzind, production has steadily ramped up to an astonishing 1 BILLION 555s being made per year, and they crossed that threshold in 2003!

For the announcement we put together an example circuit that when connected to a servo lets you control the angle (or position) by turning a potentiometer.  Click the Read More button to load it.  Click the PLAY button (upper right) in the frame below to start the simulation, and click on the blue circle (potentiometer) to change the angle of the servo.

Example 555 servo controller.

The example shows the 555 acting like an oscillator, which is the behavior of one of it's three modes: Astable mode.  The other two modes: Monostable mode, where it acts like a timer, and Bistable mode, where it acts like a Schmitt-Trigger are equally as useful.  

We've given you the tools, now for the challenge!  What can you build with a 555 in 123D Circuits?