Stopwatch Circuit: Schematic for High School Engineering Project

[Jeff179]

Hello,
I am in need of a schematic for a circuit that acts as a stopwatch which counts and displays seconds and 1/100ths of seconds for a high school engineering project. The circuit would have two input switches: one that acts as a start/stop button and one that acts as a reset button. After searching around on the internet, the closest thing I have found were these:

http://www.electronics-lab.com/projects/oscillators_timers/014/index.html
http://www.electronics-lab.com/projects/oscillators_timers/015/index.html

These would work except that I need it to display 1/100ths of a second as well. Having minutes also would be helpful but not necessary. Could anybody help me figure out how I could do this?
Thanks, any help is appreciated.

 

[MATLABdude]

Do you know how to use a microcontroller? It'd be dead simple with one.

 

[oswaler]

Dear student,

Thank you for reaching out for help with your high school engineering project. The circuits you have found online are a good starting point, but as you mentioned, they do not display 1/100ths of a second. To achieve this level of precision, you will need to use a more advanced circuit design.

One option is to use a microcontroller, such as an Arduino, to create your stopwatch circuit. With a microcontroller, you can program it to count and display 1/100ths of a second, as well as minutes and seconds. You can also incorporate the two input switches to act as the start/stop and reset buttons.

Another option is to use a digital integrated circuit (IC) specifically designed for timing applications, such as the CD4541. This IC has a built-in oscillator and can be programmed to count in 1/100ths of a second. You can find schematic diagrams and tutorials for using this IC online.

I recommend doing some further research and experimentation to determine which option would be the best fit for your project. It's important to keep in mind the level of complexity and resources you have available for your project. I wish you the best of luck in your project and hope this response was helpful. If you have any further questions, please feel free to reach out.

Sincerely,