Analyzing PWM Period and Duty Cycle without an Oscilloscope
Now that I have an oscilloscope, I’ve been able to learn a lot more about the circuit I’ve been designing for the MC-2100, as well as the MC-2100 itself. However, a lot of people don’t have access to a scope (even one as old and crappy as mine :)). I’ve had an idea for a method of analyzing a PWM signal without a scope for a while now. Last night, I got some time to test my idea and it worked fairly well, so I figured I’d share it here.
Brian, and 1 other are discussing. 
littleschoolie 9:50 am on April 6, 2013 Permalink |
Dude that is awesome.
Brian 12:10 pm on April 25, 2013 Permalink |
This is pretty great. I’m building a PWM that may or may not be capable of 100% duty cycle, and I’d love to confirm it one way or the other but I don’t have an oscilloscope. I figured there would be a way to somehow generate an output that could be measured audibly. Visual wouldn’t really work as an LED could pulse faster than visible detection.
schoolie 3:41 pm on April 25, 2013 Permalink |
Cool! I think if you get to 100% duty cycle, the buzzer will be silent. You can probably confirm that without even analyzing the signal. I’d love to hear if this ends up working for you.