Hi Folks.
I need to measure the duty cycle of a DC pulse. I'm in a spot of difficulty because the pulse width is around 0.1s. Which is too fast to measure manually... and I don't have an oscilloscope. A sampling rate of 20Hz would be sufficient, and I need only the pulse widths, not the actual voltage. Can anybody recommend a cheap (and simple) solution to get the measurement?
I was thinking of using the soundcard, because I've seen some soundcard oscilloscope software. But the soundcard is AC coupled and besides, I'm not sure how to wire it without killing my soundcard.
Any advice or suggestions would be appreciated.